Merge android-4.4.114 (fe09418) into msm-4.4

* refs/heads/tmp-fe09418
  Linux 4.4.114
  nfsd: auth: Fix gid sorting when rootsquash enabled
  net: tcp: close sock if net namespace is exiting
  flow_dissector: properly cap thoff field
  ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY
  net: Allow neigh contructor functions ability to modify the primary_key
  vmxnet3: repair memory leak
  sctp: return error if the asoc has been peeled off in sctp_wait_for_sndbuf
  sctp: do not allow the v4 socket to bind a v4mapped v6 address
  r8169: fix memory corruption on retrieval of hardware statistics.
  pppoe: take ->needed_headroom of lower device into account on xmit
  net: qdisc_pkt_len_init() should be more robust
  tcp: __tcp_hdrlen() helper
  net: igmp: fix source address check for IGMPv3 reports
  lan78xx: Fix failure in USB Full Speed
  ipv6: ip6_make_skb() needs to clear cork.base.dst
  ipv6: fix udpv6 sendmsg crash caused by too small MTU
  ipv6: Fix getsockopt() for sockets with default IPV6_AUTOFLOWLABEL
  dccp: don't restart ccid2_hc_tx_rto_expire() if sk in closed state
  hrtimer: Reset hrtimer cpu base proper on CPU hotplug
  x86/microcode/intel: Extend BDW late-loading further with LLC size check
  eventpoll.h: add missing epoll event masks
  vsyscall: Fix permissions for emulate mode with KAISER/PTI
  um: link vmlinux with -no-pie
  usbip: prevent leaking socket pointer address in messages
  usbip: fix stub_rx: harden CMD_SUBMIT path to handle malicious input
  usbip: fix stub_rx: get_pipe() to validate endpoint number
  usb: usbip: Fix possible deadlocks reported by lockdep
  Input: trackpoint - force 3 buttons if 0 button is reported
  Revert "module: Add retpoline tag to VERMAGIC"
  scsi: libiscsi: fix shifting of DID_REQUEUE host byte
  fs/fcntl: f_setown, avoid undefined behaviour
  reiserfs: Don't clear SGID when inheriting ACLs
  reiserfs: don't preallocate blocks for extended attributes
  reiserfs: fix race in prealloc discard
  ext2: Don't clear SGID when inheriting ACLs
  netfilter: xt_osf: Add missing permission checks
  netfilter: nfnetlink_cthelper: Add missing permission checks
  netfilter: fix IS_ERR_VALUE usage
  netfilter: use fwmark_reflect in nf_send_reset
  netfilter: nf_conntrack_sip: extend request line validation
  netfilter: restart search if moved to other chain
  netfilter: nfnetlink_queue: reject verdict request from different portid
  netfilter: nf_ct_expect: remove the redundant slash when policy name is empty
  netfilter: nf_dup_ipv6: set again FLOWI_FLAG_KNOWN_NH at flowi6_flags
  netfilter: arp_tables: fix invoking 32bit "iptable -P INPUT ACCEPT" failed in 64bit kernel
  netfilter: x_tables: speed up jump target validation
  ACPICA: Namespace: fix operand cache leak
  ACPI / scan: Prefer devices without _HID/_CID for _ADR matching
  ACPI / processor: Avoid reserving IO regions too early
  x86/ioapic: Fix incorrect pointers in ioapic_setup_resources()
  ipc: msg, make msgrcv work with LONG_MIN
  mm, page_alloc: fix potential false positive in __zone_watermark_ok
  cma: fix calculation of aligned offset
  hwpoison, memcg: forcibly uncharge LRU pages
  mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack
  fs/select: add vmalloc fallback for select(2)
  mmc: sdhci-of-esdhc: add/remove some quirks according to vendor version
  PCI: layerscape: Fix MSG TLP drop setting
  PCI: layerscape: Add "fsl,ls2085a-pcie" compatible ID
  drivers: base: cacheinfo: fix boot error message when acpi is enabled
  drivers: base: cacheinfo: fix x86 with CONFIG_OF enabled
  Prevent timer value 0 for MWAITX
  timers: Plug locking race vs. timer migration
  time: Avoid undefined behaviour in ktime_add_safe()
  PM / sleep: declare __tracedata symbols as char[] rather than char
  can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once
  can: af_can: can_rcv(): replace WARN_ONCE by pr_warn_once
  sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks
  x86/retpoline: Fill RSB on context switch for affected CPUs
  x86/cpu/intel: Introduce macros for Intel family numbers
  x86/microcode/intel: Fix BDW late-loading revision check
  usbip: Fix potential format overflow in userspace tools
  usbip: Fix implicit fallthrough warning
  usbip: prevent vhci_hcd driver from leaking a socket pointer address
  x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
  ANDROID: sched: EAS: check energy_aware() before calling select_energy_cpu_brute() in up-migrate path
  UPSTREAM: eventpoll.h: add missing epoll event masks
  ANDROID: xattr: Pass EOPNOTSUPP to permission2

Conflicts:
	kernel/sched/fair.c

Change-Id: I15005cb3bc039f4361d25ed2e22f8175b3d7ca96
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

93 files changed, 919 insertions, 365 deletions

diff --git a/Makefile b/Makefile
index ba24b36d8ded..49681e6f8f0c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 4
-SUBLEVEL = 113
+SUBLEVEL = 114
 EXTRAVERSION =
 NAME = Blurry Fish Butt
 
diff --git a/arch/um/Makefile b/arch/um/Makefile
index e3abe6f3156d..9ccf462131c4 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -117,7 +117,7 @@ archheaders:
 archprepare: include/generated/user_constants.h
 
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
-LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
+LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
 
 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
 	$(call cc-option, -fno-stack-protector,) \
diff --git a/arch/x86/entry/vsyscall/vsyscall_64.c b/arch/x86/entry/vsyscall/vsyscall_64.c
index 112178b401a1..2d359991a273 100644
--- a/arch/x86/entry/vsyscall/vsyscall_64.c
+++ b/arch/x86/entry/vsyscall/vsyscall_64.c
@@ -46,6 +46,7 @@ static enum { EMULATE, NATIVE, NONE } vsyscall_mode =
 #else
 	EMULATE;
 #endif
+unsigned long vsyscall_pgprot = __PAGE_KERNEL_VSYSCALL;
 
 static int __init vsyscall_setup(char *str)
 {
@@ -336,11 +337,11 @@ void __init map_vsyscall(void)
 	extern char __vsyscall_page;
 	unsigned long physaddr_vsyscall = __pa_symbol(&__vsyscall_page);
 
+	if (vsyscall_mode != NATIVE)
+		vsyscall_pgprot = __PAGE_KERNEL_VVAR;
 	if (vsyscall_mode != NONE)
 		__set_fixmap(VSYSCALL_PAGE, physaddr_vsyscall,
-			     vsyscall_mode == NATIVE
-			     ? PAGE_KERNEL_VSYSCALL
-			     : PAGE_KERNEL_VVAR);
+			     __pgprot(vsyscall_pgprot));
 
 	BUILD_BUG_ON((unsigned long)__fix_to_virt(VSYSCALL_PAGE) !=
 		     (unsigned long)VSYSCALL_ADDR);
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 0fbc98568018..641f0f2c2982 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -199,6 +199,7 @@
 #define X86_FEATURE_HWP_EPP	( 7*32+13) /* Intel HWP_EPP */
 #define X86_FEATURE_HWP_PKG_REQ ( 7*32+14) /* Intel HWP_PKG_REQ */
 #define X86_FEATURE_INTEL_PT	( 7*32+15) /* Intel Processor Trace */
+#define X86_FEATURE_RSB_CTXSW	( 7*32+19) /* Fill RSB on context switches */
 
 #define X86_FEATURE_RETPOLINE	( 7*32+29) /* Generic Retpoline mitigation for Spectre variant 2 */
 #define X86_FEATURE_RETPOLINE_AMD ( 7*32+30) /* AMD Retpoline mitigation for Spectre variant 2 */
diff --git a/arch/x86/include/asm/intel-family.h b/arch/x86/include/asm/intel-family.h
new file mode 100644
index 000000000000..6999f7d01a0d
--- /dev/null
+++ b/arch/x86/include/asm/intel-family.h
@@ -0,0 +1,68 @@
+#ifndef _ASM_X86_INTEL_FAMILY_H
+#define _ASM_X86_INTEL_FAMILY_H
+
+/*
+ * "Big Core" Processors (Branded as Core, Xeon, etc...)
+ *
+ * The "_X" parts are generally the EP and EX Xeons, or the
+ * "Extreme" ones, like Broadwell-E.
+ *
+ * Things ending in "2" are usually because we have no better
+ * name for them.  There's no processor called "WESTMERE2".
+ */
+
+#define INTEL_FAM6_CORE_YONAH		0x0E
+#define INTEL_FAM6_CORE2_MEROM		0x0F
+#define INTEL_FAM6_CORE2_MEROM_L	0x16
+#define INTEL_FAM6_CORE2_PENRYN		0x17
+#define INTEL_FAM6_CORE2_DUNNINGTON	0x1D
+
+#define INTEL_FAM6_NEHALEM		0x1E
+#define INTEL_FAM6_NEHALEM_EP		0x1A
+#define INTEL_FAM6_NEHALEM_EX		0x2E
+#define INTEL_FAM6_WESTMERE		0x25
+#define INTEL_FAM6_WESTMERE2		0x1F
+#define INTEL_FAM6_WESTMERE_EP		0x2C
+#define INTEL_FAM6_WESTMERE_EX		0x2F
+
+#define INTEL_FAM6_SANDYBRIDGE		0x2A
+#define INTEL_FAM6_SANDYBRIDGE_X	0x2D
+#define INTEL_FAM6_IVYBRIDGE		0x3A
+#define INTEL_FAM6_IVYBRIDGE_X		0x3E
+
+#define INTEL_FAM6_HASWELL_CORE		0x3C
+#define INTEL_FAM6_HASWELL_X		0x3F
+#define INTEL_FAM6_HASWELL_ULT		0x45
+#define INTEL_FAM6_HASWELL_GT3E		0x46
+
+#define INTEL_FAM6_BROADWELL_CORE	0x3D
+#define INTEL_FAM6_BROADWELL_XEON_D	0x56
+#define INTEL_FAM6_BROADWELL_GT3E	0x47
+#define INTEL_FAM6_BROADWELL_X		0x4F
+
+#define INTEL_FAM6_SKYLAKE_MOBILE	0x4E
+#define INTEL_FAM6_SKYLAKE_DESKTOP	0x5E
+#define INTEL_FAM6_SKYLAKE_X		0x55
+#define INTEL_FAM6_KABYLAKE_MOBILE	0x8E
+#define INTEL_FAM6_KABYLAKE_DESKTOP	0x9E
+
+/* "Small Core" Processors (Atom) */
+
+#define INTEL_FAM6_ATOM_PINEVIEW	0x1C
+#define INTEL_FAM6_ATOM_LINCROFT	0x26
+#define INTEL_FAM6_ATOM_PENWELL		0x27
+#define INTEL_FAM6_ATOM_CLOVERVIEW	0x35
+#define INTEL_FAM6_ATOM_CEDARVIEW	0x36
+#define INTEL_FAM6_ATOM_SILVERMONT1	0x37 /* BayTrail/BYT / Valleyview */
+#define INTEL_FAM6_ATOM_SILVERMONT2	0x4D /* Avaton/Rangely */
+#define INTEL_FAM6_ATOM_AIRMONT		0x4C /* CherryTrail / Braswell */
+#define INTEL_FAM6_ATOM_MERRIFIELD1	0x4A /* Tangier */
+#define INTEL_FAM6_ATOM_MERRIFIELD2	0x5A /* Annidale */
+#define INTEL_FAM6_ATOM_GOLDMONT	0x5C
+#define INTEL_FAM6_ATOM_DENVERTON	0x5F /* Goldmont Microserver */
+
+/* Xeon Phi */
+
+#define INTEL_FAM6_XEON_PHI_KNL		0x57 /* Knights Landing */
+
+#endif /* _ASM_X86_INTEL_FAMILY_H */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index c124d6ab4bf9..86bccb4bd4dc 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -574,7 +574,7 @@ static inline void sync_core(void)
 {
 	int tmp;
 
-#ifdef CONFIG_M486
+#ifdef CONFIG_X86_32
 	/*
 	 * Do a CPUID if available, otherwise do a jump.  The jump
 	 * can conveniently enough be the jump around CPUID.
diff --git a/arch/x86/include/asm/switch_to.h b/arch/x86/include/asm/switch_to.h
index 751bf4b7bf11..025ecfaba9c9 100644
--- a/arch/x86/include/asm/switch_to.h
+++ b/arch/x86/include/asm/switch_to.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_X86_SWITCH_TO_H
 #define _ASM_X86_SWITCH_TO_H
 
+#include <asm/nospec-branch.h>
+
 struct task_struct; /* one of the stranger aspects of C forward declarations */
 __visible struct task_struct *__switch_to(struct task_struct *prev,
 					   struct task_struct *next);
@@ -24,6 +26,23 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
 #define __switch_canary_iparam
 #endif	/* CC_STACKPROTECTOR */
 
+#ifdef CONFIG_RETPOLINE
+	/*
+	 * When switching from a shallower to a deeper call stack
+	 * the RSB may either underflow or use entries populated
+	 * with userspace addresses. On CPUs where those concerns
+	 * exist, overwrite the RSB with entries which capture
+	 * speculative execution to prevent attack.
+	 */
+#define __retpoline_fill_return_buffer					\
+	ALTERNATIVE("jmp 910f",						\
+		__stringify(__FILL_RETURN_BUFFER(%%ebx, RSB_CLEAR_LOOPS, %%esp)),\
+		X86_FEATURE_RSB_CTXSW)					\
+	"910:\n\t"
+#else
+#define __retpoline_fill_return_buffer
+#endif
+
 /*
  * Saving eflags is important. It switches not only IOPL between tasks,
  * it also protects other tasks from NT leaking through sysenter etc.
@@ -46,6 +65,7 @@ do {									\
 		     "movl $1f,%[prev_ip]\n\t"	/* save    EIP   */	\
 		     "pushl %[next_ip]\n\t"	/* restore EIP   */	\
 		     __switch_canary					\
+		     __retpoline_fill_return_buffer			\
 		     "jmp __switch_to\n"	/* regparm call  */	\
 		     "1:\t"						\
 		     "popl %%ebp\n\t"		/* restore EBP   */	\
@@ -100,6 +120,23 @@ do {									\
 #define __switch_canary_iparam
 #endif	/* CC_STACKPROTECTOR */
 
+#ifdef CONFIG_RETPOLINE
+	/*
+	 * When switching from a shallower to a deeper call stack
+	 * the RSB may either underflow or use entries populated
+	 * with userspace addresses. On CPUs where those concerns
+	 * exist, overwrite the RSB with entries which capture
+	 * speculative execution to prevent attack.
+	 */
+#define __retpoline_fill_return_buffer					\
+	ALTERNATIVE("jmp 910f",						\
+		__stringify(__FILL_RETURN_BUFFER(%%r12, RSB_CLEAR_LOOPS, %%rsp)),\
+		X86_FEATURE_RSB_CTXSW)					\
+	"910:\n\t"
+#else
+#define __retpoline_fill_return_buffer
+#endif
+
 /*
  * There is no need to save or restore flags, because flags are always
  * clean in kernel mode, with the possible exception of IOPL.  Kernel IOPL
@@ -112,6 +149,7 @@ do {									\
 	     "call __switch_to\n\t"					  \
 	     "movq "__percpu_arg([current_task])",%%rsi\n\t"		  \
 	     __switch_canary						  \
+	     __retpoline_fill_return_buffer				  \
 	     "movq %P[thread_info](%%rsi),%%r8\n\t"			  \
 	     "movq %%rax,%%rdi\n\t" 					  \
 	     "testl  %[_tif_fork],%P[ti_flags](%%r8)\n\t"		  \
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h
index 4865e10dbb55..9ee85066f407 100644
--- a/arch/x86/include/asm/vsyscall.h
+++ b/arch/x86/include/asm/vsyscall.h
@@ -13,6 +13,7 @@ extern void map_vsyscall(void);
  */
 extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
 extern bool vsyscall_enabled(void);
+extern unsigned long vsyscall_pgprot;
 #else
 static inline void map_vsyscall(void) {}
 static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index fc91c98bee01..fd945099fc95 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2592,8 +2592,8 @@ static struct resource * __init ioapic_setup_resources(void)
 		res[num].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 		snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i);
 		mem += IOAPIC_RESOURCE_NAME_SIZE;
+		ioapics[i].iomem_res = &res[num];
 		num++;
-		ioapics[i].iomem_res = res;
 	}
 
 	ioapic_resources = res;
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 49d25ddf0e9f..8cacf62ec458 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -22,6 +22,7 @@
 #include <asm/alternative.h>
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>
+#include <asm/intel-family.h>
 
 static void __init spectre_v2_select_mitigation(void);
 
@@ -154,6 +155,23 @@ disable:
 	return SPECTRE_V2_CMD_NONE;
 }
 
+/* Check for Skylake-like CPUs (for RSB handling) */
+static bool __init is_skylake_era(void)
+{
+	if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
+	    boot_cpu_data.x86 == 6) {
+		switch (boot_cpu_data.x86_model) {
+		case INTEL_FAM6_SKYLAKE_MOBILE:
+		case INTEL_FAM6_SKYLAKE_DESKTOP:
+		case INTEL_FAM6_SKYLAKE_X:
+		case INTEL_FAM6_KABYLAKE_MOBILE:
+		case INTEL_FAM6_KABYLAKE_DESKTOP:
+			return true;
+		}
+	}
+	return false;
+}
+
 static void __init spectre_v2_select_mitigation(void)
 {
 	enum spectre_v2_mitigation_cmd cmd = spectre_v2_parse_cmdline();
@@ -212,6 +230,24 @@ retpoline_auto:
 
 	spectre_v2_enabled = mode;
 	pr_info("%s\n", spectre_v2_strings[mode]);
+
+	/*
+	 * If neither SMEP or KPTI are available, there is a risk of
+	 * hitting userspace addresses in the RSB after a context switch
+	 * from a shallow call stack to a deeper one. To prevent this fill
+	 * the entire RSB, even when using IBRS.
+	 *
+	 * Skylake era CPUs have a separate issue with *underflow* of the
+	 * RSB, when they will predict 'ret' targets from the generic BTB.
+	 * The proper mitigation for this is IBRS. If IBRS is not supported
+	 * or deactivated in favour of retpolines the RSB fill on context
+	 * switch is required.
+	 */
+	if ((!boot_cpu_has(X86_FEATURE_KAISER) &&
+	     !boot_cpu_has(X86_FEATURE_SMEP)) || is_skylake_era()) {
+		setup_force_cpu_cap(X86_FEATURE_RSB_CTXSW);
+		pr_info("Filling RSB on context switch\n");
+	}
 }
 
 #undef pr_fmt
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index e38d338a6447..b4ca91cf55b0 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -934,6 +934,8 @@ static int __populate_cache_leaves(unsigned int cpu)
 		ci_leaf_init(this_leaf++, &id4_regs);
 		__cache_cpumap_setup(cpu, idx, &id4_regs);
 	}
+	this_cpu_ci->cpu_map_populated = true;
+
 	return 0;
 }
 
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index b428a8174be1..2c76a1801393 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -39,6 +39,9 @@
 #include <asm/setup.h>
 #include <asm/msr.h>
 
+/* last level cache size per core */
+static int llc_size_per_core;
+
 static unsigned long mc_saved_in_initrd[MAX_UCODE_COUNT];
 static struct mc_saved_data {
 	unsigned int mc_saved_count;
@@ -996,15 +999,18 @@ static bool is_blacklisted(unsigned int cpu)
 
 	/*
 	 * Late loading on model 79 with microcode revision less than 0x0b000021
-	 * may result in a system hang. This behavior is documented in item
-	 * BDF90, #334165 (Intel Xeon Processor E7-8800/4800 v4 Product Family).
+	 * and LLC size per core bigger than 2.5MB may result in a system hang.
+	 * This behavior is documented in item BDF90, #334165 (Intel Xeon
+	 * Processor E7-8800/4800 v4 Product Family).
 	 */
 	if (c->x86 == 6 &&
 	    c->x86_model == 79 &&
 	    c->x86_mask == 0x01 &&
+	    llc_size_per_core > 2621440 &&
 	    c->microcode < 0x0b000021) {
 		pr_err_once("Erratum BDF90: late loading with revision < 0x0b000021 (0x%x) disabled.\n", c->microcode);
 		pr_err_once("Please consider either early loading through initrd/built-in or a potential BIOS update.\n");
+		return true;
 	}
 
 	return false;
@@ -1067,6 +1073,15 @@ static struct microcode_ops microcode_intel_ops = {
 	.microcode_fini_cpu               = microcode_fini_cpu,
 };
 
+static int __init calc_llc_size_per_core(struct cpuinfo_x86 *c)
+{
+	u64 llc_size = c->x86_cache_size * 1024;
+
+	do_div(llc_size, c->x86_max_cores);
+
+	return (int)llc_size;
+}
+
 struct microcode_ops * __init init_intel_microcode(void)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
@@ -1077,6 +1092,8 @@ struct microcode_ops * __init init_intel_microcode(void)
 		return NULL;
 	}
 
+	llc_size_per_core = calc_llc_size_per_core(c);
+
 	return &microcode_intel_ops;
 }
 
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index e912b2f6d36e..45772560aceb 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -93,6 +93,13 @@ static void delay_mwaitx(unsigned long __loops)
 {
 	u64 start, end, delay, loops = __loops;
 
+	/*
+	 * Timer value of 0 causes MWAITX to wait indefinitely, unless there
+	 * is a store on the memory monitored by MONITORX.
+	 */
+	if (loops == 0)
+		return;
+
 	start = rdtsc_ordered();
 
 	for (;;) {
diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c
index 8af98513d36c..2298434f7bdb 100644
--- a/arch/x86/mm/kaiser.c
+++ b/arch/x86/mm/kaiser.c
@@ -345,7 +345,7 @@ void __init kaiser_init(void)
 	if (vsyscall_enabled())
 		kaiser_add_user_map_early((void *)VSYSCALL_ADDR,
 					  PAGE_SIZE,
-					   __PAGE_KERNEL_VSYSCALL);
+					  vsyscall_pgprot);
 
 	for_each_possible_cpu(cpu) {
 		void *percpu_vaddr = __per_cpu_user_mapped_start +
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 9f77943653fb..b63a173786d5 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -331,15 +331,6 @@ static int acpi_processor_get_info(struct acpi_device *device)
 		pr->throttling.duty_width = acpi_gbl_FADT.duty_width;
 
 		pr->pblk = object.processor.pblk_address;
-
-		/*
-		 * We don't care about error returns - we just try to mark
-		 * these reserved so that nobody else is confused into thinking
-		 * that this region might be unused..
-		 *
-		 * (In particular, allocating the IO range for Cardbus)
-		 */
-		request_region(pr->throttling.address, 6, "ACPI CPU throttle");
 	}
 
 	/*
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index de325ae04ce1..3b3c5b90bd20 100644
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -593,25 +593,20 @@ struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle)
 void acpi_ns_terminate(void)
 {
 	acpi_status status;
+	union acpi_operand_object *prev;
+	union acpi_operand_object *next;
 
 	ACPI_FUNCTION_TRACE(ns_terminate);
 
-#ifdef ACPI_EXEC_APP
-	{
-		union acpi_operand_object *prev;
-		union acpi_operand_object *next;
+	/* Delete any module-level code blocks */
 
-		/* Delete any module-level code blocks */
-
-		next = acpi_gbl_module_code_list;
-		while (next) {
-			prev = next;
-			next = next->method.mutex;
-			prev->method.mutex = NULL;	/* Clear the Mutex (cheated) field */
-			acpi_ut_remove_reference(prev);
-		}
+	next = acpi_gbl_module_code_list;
+	while (next) {
+		prev = next;
+		next = next->method.mutex;
+		prev->method.mutex = NULL;	/* Clear the Mutex (cheated) field */
+		acpi_ut_remove_reference(prev);
 	}
-#endif
 
 	/*
 	 * Free the entire namespace -- all nodes and all objects
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 73c9c7fa9001..f06317d6fc38 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -99,13 +99,13 @@ static int find_child_checks(struct acpi_device *adev, bool check_children)
 		return -ENODEV;
 
 	/*
-	 * If the device has a _HID (or _CID) returning a valid ACPI/PNP
-	 * device ID, it is better to make it look less attractive here, so that
-	 * the other device with the same _ADR value (that may not have a valid
-	 * device ID) can be matched going forward.  [This means a second spec
-	 * violation in a row, so whatever we do here is best effort anyway.]
+	 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
+	 * better to make it look less attractive here, so that the other device
+	 * with the same _ADR value (that may not have a valid device ID) can be
+	 * matched going forward.  [This means a second spec violation in a row,
+	 * so whatever we do here is best effort anyway.]
 	 */
-	return sta_present && list_empty(&adev->pnp.ids) ?
+	return sta_present && !adev->pnp.type.platform_id ?
 			FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
 }
 
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index f170d746336d..c72e64893d03 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -676,6 +676,15 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
 	if (!pr->flags.throttling)
 		return -ENODEV;
 
+	/*
+	 * We don't care about error returns - we just try to mark
+	 * these reserved so that nobody else is confused into thinking
+	 * that this region might be unused..
+	 *
+	 * (In particular, allocating the IO range for Cardbus)
+	 */
+	request_region(pr->throttling.address, 6, "ACPI CPU throttle");
+
 	pr->throttling.state = 0;
 
 	duty_mask = pr->throttling.state_count - 1;
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index e9fd32e91668..70e13cf06ed0 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -16,6 +16,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include <linux/acpi.h>
 #include <linux/bitops.h>
 #include <linux/cacheinfo.h>
 #include <linux/compiler.h>
@@ -104,9 +105,16 @@ static int cache_shared_cpu_map_setup(unsigned int cpu)
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct cacheinfo *this_leaf, *sib_leaf;
 	unsigned int index;
-	int ret;
+	int ret = 0;
+
+	if (this_cpu_ci->cpu_map_populated)
+		return 0;
 
-	ret = cache_setup_of_node(cpu);
+	if (of_have_populated_dt())
+		ret = cache_setup_of_node(cpu);
+	else if (!acpi_disabled)
+		/* No cache property/hierarchy support yet in ACPI */
+		ret = -ENOTSUPP;
 	if (ret)
 		return ret;
 
@@ -203,8 +211,7 @@ static int detect_cache_attributes(unsigned int cpu)
 	 */
 	ret = cache_shared_cpu_map_setup(cpu);
 	if (ret) {
-		pr_warn("Unable to detect cache hierarchy from DT for CPU %d\n",
-			cpu);
+		pr_warn("Unable to detect cache hierarchy for CPU %d\n", cpu);
 		goto free_ci;
 	}
 	return 0;
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index a311cfa4c5bd..a6975795e7f3 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c
@@ -166,14 +166,14 @@ void generate_pm_trace(const void *tracedata, unsigned int user)
 }
 EXPORT_SYMBOL(generate_pm_trace);
 
-extern char __tracedata_start, __tracedata_end;
+extern char __tracedata_start[], __tracedata_end[];
 static int show_file_hash(unsigned int value)
 {
 	int match;
 	char *tracedata;
 
 	match = 0;
-	for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ;
+	for (tracedata = __tracedata_start ; tracedata < __tracedata_end ;
 			tracedata += 2 + sizeof(unsigned long)) {
 		unsigned short lineno = *(unsigned short *)tracedata;
 		const char *file = *(const char **)(tracedata + 2);
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 7e2dc5e56632..0b49f29bf0da 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -383,6 +383,9 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
 	if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
 		psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
 		button_info = 0x33;
+	} else if (!button_info) {
+		psmouse_warn(psmouse, "got 0 in extended button data, assuming 3 buttons\n");
+		button_info = 0x33;
 	}
 
 	psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 90e94a028a49..83b1226471c1 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -584,6 +584,8 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
 {
 	struct sdhci_host *host;
 	struct device_node *np;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct sdhci_esdhc *esdhc;
 	int ret;
 
 	np = pdev->dev.of_node;
@@ -600,6 +602,14 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
 
 	sdhci_get_of_property(pdev);
 
+	pltfm_host = sdhci_priv(host);
+	esdhc = pltfm_host->priv;
+	if (esdhc->vendor_ver == VENDOR_V_22)
+		host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
+
+	if (esdhc->vendor_ver > VENDOR_V_22)
+		host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
+
 	if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
 	    of_device_is_compatible(np, "fsl,p5020-esdhc") ||
 	    of_device_is_compatible(np, "fsl,p4080-esdhc") ||
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index c5ea1018cb47..24155380e43c 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -2205,19 +2205,14 @@ static bool rtl8169_do_counters(struct net_device *dev, u32 counter_cmd)
 	void __iomem *ioaddr = tp->mmio_addr;
 	dma_addr_t paddr = tp->counters_phys_addr;
 	u32 cmd;
-	bool ret;
 
 	RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
+	RTL_R32(CounterAddrHigh);
 	cmd = (u64)paddr & DMA_BIT_MASK(32);
 	RTL_W32(CounterAddrLow, cmd);
 	RTL_W32(CounterAddrLow, cmd | counter_cmd);
 
-	ret = rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
-
-	RTL_W32(CounterAddrLow, 0);
-	RTL_W32(CounterAddrHigh, 0);
-
-	return ret;
+	return rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
 }
 
 static bool rtl8169_reset_counters(struct net_device *dev)
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index 4e0068e775f9..b7b859c3a0c7 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -860,6 +860,7 @@ static int pppoe_sendmsg(struct socket *sock, struct msghdr *m,
 	struct pppoe_hdr *ph;
 	struct net_device *dev;
 	char *start;
+	int hlen;
 
 	lock_sock(sk);
 	if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) {
@@ -878,16 +879,16 @@ static int pppoe_sendmsg(struct socket *sock, struct msghdr *m,
 	if (total_len > (dev->mtu + dev->hard_header_len))
 		goto end;
 
-
-	skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32,
-			   0, GFP_KERNEL);
+	hlen = LL_RESERVED_SPACE(dev);
+	skb = sock_wmalloc(sk, hlen + sizeof(*ph) + total_len +
+			   dev->needed_tailroom, 0, GFP_KERNEL);
 	if (!skb) {
 		error = -ENOMEM;
 		goto end;
 	}
 
 	/* Reserve space for headers. */
-	skb_reserve(skb, dev->hard_header_len);
+	skb_reserve(skb, hlen);
 	skb_reset_network_header(skb);
 
 	skb->dev = dev;
@@ -948,7 +949,7 @@ static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb)
 	/* Copy the data if there is no space for the header or if it's
 	 * read-only.
 	 */
-	if (skb_cow_head(skb, sizeof(*ph) + dev->hard_header_len))
+	if (skb_cow_head(skb, LL_RESERVED_SPACE(dev) + sizeof(*ph)))
 		goto abort;
 
 	__skb_push(skb, sizeof(*ph));
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 41e9ebd7d0a6..ebdee8f01f65 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -1859,6 +1859,7 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 		buf = DEFAULT_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 		dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE;
 		dev->rx_qlen = 4;
+		dev->tx_qlen = 4;
 	}
 
 	ret = lan78xx_write_reg(dev, BURST_CAP, buf);
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 0cbf520cea77..82bf85ae5d08 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -1563,7 +1563,6 @@ static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
 					  rq->rx_ring[i].basePA);
 			rq->rx_ring[i].base = NULL;
 		}
-		rq->buf_info[i] = NULL;
 	}
 
 	if (rq->comp_ring.base) {
@@ -1578,6 +1577,7 @@ static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
 			(rq->rx_ring[0].size + rq->rx_ring[1].size);
 		dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
 				  rq->buf_info_pa);
+		rq->buf_info[0] = rq->buf_info[1] = NULL;
 	}
 }
 
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 3923bed93c7e..a21e229d95e0 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -77,6 +77,16 @@ static void ls_pcie_fix_class(struct ls_pcie *pcie)
 	iowrite16(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE);
 }
 
+/* Drop MSG TLP except for Vendor MSG */
+static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
+{
+	u32 val;
+
+	val = ioread32(pcie->dbi + PCIE_STRFMR1);
+	val &= 0xDFFFFFFF;
+	iowrite32(val, pcie->dbi + PCIE_STRFMR1);
+}
+
 static int ls1021_pcie_link_up(struct pcie_port *pp)
 {
 	u32 state;
@@ -97,7 +107,7 @@ static int ls1021_pcie_link_up(struct pcie_port *pp)
 static void ls1021_pcie_host_init(struct pcie_port *pp)
 {
 	struct ls_pcie *pcie = to_ls_pcie(pp);
-	u32 val, index[2];
+	u32 index[2];
 
 	pcie->scfg = syscon_regmap_lookup_by_phandle(pp->dev->of_node,
 						     "fsl,pcie-scfg");
@@ -116,13 +126,7 @@ static void ls1021_pcie_host_init(struct pcie_port *pp)
 
 	dw_pcie_setup_rc(pp);
 
-	/*
-	 * LS1021A Workaround for internal TKT228622
-	 * to fix the INTx hang issue
-	 */
-	val = ioread32(pcie->dbi + PCIE_STRFMR1);
-	val &= 0xffff;
-	iowrite32(val, pcie->dbi + PCIE_STRFMR1);
+	ls_pcie_drop_msg_tlp(pcie);
 }
 
 static int ls_pcie_link_up(struct pcie_port *pp)
@@ -147,6 +151,7 @@ static void ls_pcie_host_init(struct pcie_port *pp)
 	iowrite32(1, pcie->dbi + PCIE_DBI_RO_WR_EN);
 	ls_pcie_fix_class(pcie);
 	ls_pcie_clear_multifunction(pcie);
+	ls_pcie_drop_msg_tlp(pcie);
 	iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN);
 }
 
@@ -203,6 +208,7 @@ static const struct of_device_id ls_pcie_of_match[] = {
 	{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021_drvdata },
 	{ .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
 	{ .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
+	{ .compatible = "fsl,ls2085a-pcie", .data = &ls2080_drvdata },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ls_pcie_of_match);
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index c1ccf1ee99ea..efce04df2109 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1727,7 +1727,7 @@ int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc)
 
 	if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
 		reason = FAILURE_SESSION_IN_RECOVERY;
-		sc->result = DID_REQUEUE;
+		sc->result = DID_REQUEUE << 16;
 		goto fault;
 	}
 
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index a3ec49bdc1e6..ec38370ffcab 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -163,8 +163,7 @@ static void stub_shutdown_connection(struct usbip_device *ud)
 	 * step 1?
 	 */
 	if (ud->tcp_socket) {
-		dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n",
-			ud->tcp_socket);
+		dev_dbg(&sdev->udev->dev, "shutdown sockfd %d\n", ud->sockfd);
 		kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
 	}
 
diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
index 7de54a66044f..56cacb68040c 100644
--- a/drivers/usb/usbip/stub_rx.c
+++ b/drivers/usb/usbip/stub_rx.c
@@ -338,23 +338,26 @@ static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
 	return priv;
 }
 
-static int get_pipe(struct stub_device *sdev, int epnum, int dir)
+static int get_pipe(struct stub_device *sdev, struct usbip_header *pdu)
 {
 	struct usb_device *udev = sdev->udev;
 	struct usb_host_endpoint *ep;
 	struct usb_endpoint_descriptor *epd = NULL;
+	int epnum = pdu->base.ep;
+	int dir = pdu->base.direction;
+
+	if (epnum < 0 || epnum > 15)
+		goto err_ret;
 
 	if (dir == USBIP_DIR_IN)
 		ep = udev->ep_in[epnum & 0x7f];
 	else
 		ep = udev->ep_out[epnum & 0x7f];
-	if (!ep) {
-		dev_err(&sdev->interface->dev, "no such endpoint?, %d\n",
-			epnum);
-		BUG();
-	}
+	if (!ep)
+		goto err_ret;
 
 	epd = &ep->desc;
+
 	if (usb_endpoint_xfer_control(epd)) {
 		if (dir == USBIP_DIR_OUT)
 			return usb_sndctrlpipe(udev, epnum);
@@ -377,15 +380,37 @@ static int get_pipe(struct stub_device *sdev, int epnum, int dir)
 	}
 
 	if (usb_endpoint_xfer_isoc(epd)) {
+		/* validate packet size and number of packets */
+		unsigned int maxp, packets, bytes;
+
+#define USB_EP_MAXP_MULT_SHIFT  11
+#define USB_EP_MAXP_MULT_MASK   (3 << USB_EP_MAXP_MULT_SHIFT)
+#define USB_EP_MAXP_MULT(m) \
+	(((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
+
+		maxp = usb_endpoint_maxp(epd);
+		maxp *= (USB_EP_MAXP_MULT(
+				__le16_to_cpu(epd->wMaxPacketSize)) + 1);
+		bytes = pdu->u.cmd_submit.transfer_buffer_length;
+		packets = DIV_ROUND_UP(bytes, maxp);
+
+		if (pdu->u.cmd_submit.number_of_packets < 0 ||
+		    pdu->u.cmd_submit.number_of_packets > packets) {
+			dev_err(&sdev->udev->dev,
+				"CMD_SUBMIT: isoc invalid num packets %d\n",
+				pdu->u.cmd_submit.number_of_packets);
+			return -1;
+		}
 		if (dir == USBIP_DIR_OUT)
 			return usb_sndisocpipe(udev, epnum);
 		else
 			return usb_rcvisocpipe(udev, epnum);
 	}
 
+err_ret:
 	/* NOT REACHED */
-	dev_err(&sdev->interface->dev, "get pipe, epnum %d\n", epnum);
-	return 0;
+	dev_err(&sdev->udev->dev, "CMD_SUBMIT: invalid epnum %d\n", epnum);
+	return -1;
 }
 
 static void masking_bogus_flags(struct urb *urb)
@@ -449,7 +474,10 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
 	struct stub_priv *priv;
 	struct usbip_device *ud = &sdev->ud;
 	struct usb_device *udev = sdev->udev;
-	int pipe = get_pipe(sdev, pdu->base.ep, pdu->base.direction);
+	int pipe = get_pipe(sdev, pdu);
+
+	if (pipe == -1)
+		return;
 
 	priv = stub_priv_alloc(sdev, pdu);
 	if (!priv)
diff --git a/drivers/usb/usbip/usbip_common.c b/drivers/usb/usbip/usbip_common.c
index 9752b93f754e..1838f1b2c2fa 100644
--- a/drivers/usb/usbip/usbip_common.c
+++ b/drivers/usb/usbip/usbip_common.c
@@ -317,18 +317,14 @@ int usbip_recv(struct socket *sock, void *buf, int size)
 	struct msghdr msg;
 	struct kvec iov;
 	int total = 0;
-
 	/* for blocks of if (usbip_dbg_flag_xmit) */
 	char *bp = buf;
 	int osize = size;
 
-	usbip_dbg_xmit("enter\n");
-
-	if (!sock || !buf || !size) {
-		pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf,
-		       size);
+	if (!sock || !buf || !size)
 		return -EINVAL;
-	}
+
+	usbip_dbg_xmit("enter\n");
 
 	do {
 		sock->sk->sk_allocation = GFP_NOIO;
@@ -341,11 +337,8 @@ int usbip_recv(struct socket *sock, void *buf, int size)
 		msg.msg_flags      = MSG_NOSIGNAL;
 
 		result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL);
-		if (result <= 0) {
-			pr_debug("receive sock %p buf %p size %u ret %d total %d\n",
-				 sock, buf, size, result, total);
+		if (result <= 0)
 			goto err;
-		}
 
 		size -= result;
 		buf += result;
diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index 86b08475c254..f875ccaa55f9 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -261,6 +261,7 @@ struct usbip_device {
 	/* lock for status */
 	spinlock_t lock;
 
+	int sockfd;
 	struct socket *tcp_socket;
 
 	struct task_struct *tcp_rx;
diff --git a/drivers/usb/usbip/usbip_event.c b/drivers/usb/usbip/usbip_event.c
index 64933b993d7a..2580a32bcdff 100644
--- a/drivers/usb/usbip/usbip_event.c
+++ b/drivers/usb/usbip/usbip_event.c
@@ -117,11 +117,12 @@ EXPORT_SYMBOL_GPL(usbip_event_add);
 int usbip_event_happened(struct usbip_device *ud)
 {
 	int happened = 0;
+	unsigned long flags;
 
-	spin_lock(&ud->lock);
+	spin_lock_irqsave(&ud->lock, flags);
 	if (ud->event != 0)
 		happened = 1;
-	spin_unlock(&ud->lock);
+	spin_unlock_irqrestore(&ud->lock, flags);
 
 	return happened;
 }
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index f9af04d7f02f..00d68945548e 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -121,9 +121,11 @@ static void dump_port_status_diff(u32 prev_status, u32 new_status)
 
 void rh_port_connect(int rhport, enum usb_device_speed speed)
 {
+	unsigned long	flags;
+
 	usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
 		| (1 << USB_PORT_FEAT_C_CONNECTION);
@@ -139,22 +141,24 @@ void rh_port_connect(int rhport, enum usb_device_speed speed)
 		break;
 	}
 
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
 }
 
 static void rh_port_disconnect(int rhport)
 {
+	unsigned long	flags;
+
 	usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
 	the_controller->port_status[rhport] |=
 					(1 << USB_PORT_FEAT_C_CONNECTION);
 
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 	usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
 }
 
@@ -182,13 +186,14 @@ static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
 	int		retval;
 	int		rhport;
 	int		changed = 0;
+	unsigned long	flags;
 
 	retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8);
 	memset(buf, 0, retval);
 
 	vhci = hcd_to_vhci(hcd);
 
-	spin_lock(&vhci->lock);
+	spin_lock_irqsave(&vhci->lock, flags);
 	if (!HCD_HW_ACCESSIBLE(hcd)) {
 		usbip_dbg_vhci_rh("hw accessible flag not on?\n");
 		goto done;
@@ -209,7 +214,7 @@ static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
 		usb_hcd_resume_root_hub(hcd);
 
 done:
-	spin_unlock(&vhci->lock);
+	spin_unlock_irqrestore(&vhci->lock, flags);
 	return changed ? retval : 0;
 }
 
@@ -236,6 +241,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 	struct vhci_hcd	*dum;
 	int             retval = 0;
 	int		rhport;
+	unsigned long	flags;
 
 	u32 prev_port_status[VHCI_NPORTS];
 
@@ -254,7 +260,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 
 	dum = hcd_to_vhci(hcd);
 
-	spin_lock(&dum->lock);
+	spin_lock_irqsave(&dum->lock, flags);
 
 	/* store old status and compare now and old later */
 	if (usbip_dbg_flag_vhci_rh) {
@@ -408,7 +414,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 	}
 	usbip_dbg_vhci_rh(" bye\n");
 
-	spin_unlock(&dum->lock);
+	spin_unlock_irqrestore(&dum->lock, flags);
 
 	return retval;
 }
@@ -431,6 +437,7 @@ static void vhci_tx_urb(struct urb *urb)
 {
 	struct vhci_device *vdev = get_vdev(urb->dev);
 	struct vhci_priv *priv;
+	unsigned long flags;
 
 	if (!vdev) {
 		pr_err("could not get virtual device");
@@ -443,7 +450,7 @@ static void vhci_tx_urb(struct urb *urb)
 		return;
 	}
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 
 	priv->seqnum = atomic_inc_return(&the_controller->seqnum);
 	if (priv->seqnum == 0xffff)
@@ -457,7 +464,7 @@ static void vhci_tx_urb(struct urb *urb)
 	list_add_tail(&priv->list, &vdev->priv_tx);
 
 	wake_up(&vdev->waitq_tx);
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 }
 
 static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
@@ -466,15 +473,16 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 	struct device *dev = &urb->dev->dev;
 	int ret = 0;
 	struct vhci_device *vdev;
+	unsigned long flags;
 
 	/* patch to usb_sg_init() is in 2.5.60 */
 	BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	if (urb->status != -EINPROGRESS) {
 		dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 		return urb->status;
 	}
 
@@ -486,7 +494,7 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 	    vdev->ud.status == VDEV_ST_ERROR) {
 		dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
 		spin_unlock(&vdev->ud.lock);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 		return -ENODEV;
 	}
 	spin_unlock(&vdev->ud.lock);
@@ -559,14 +567,14 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 
 out:
 	vhci_tx_urb(urb);
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	return 0;
 
 no_need_xmit:
 	usb_hcd_unlink_urb_from_ep(hcd, urb);
 no_need_unlink:
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 	if (!ret)
 		usb_hcd_giveback_urb(vhci_to_hcd(the_controller),
 				     urb, urb->status);
@@ -623,14 +631,15 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct vhci_priv *priv;
 	struct vhci_device *vdev;
+	unsigned long flags;
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	priv = urb->hcpriv;
 	if (!priv) {
 		/* URB was never linked! or will be soon given back by
 		 * vhci_rx. */
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 		return -EIDRM;
 	}
 
@@ -639,7 +648,7 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 
 		ret = usb_hcd_check_unlink_urb(hcd, urb, status);
 		if (ret) {
-			spin_unlock(&the_controller->lock);
+			spin_unlock_irqrestore(&the_controller->lock, flags);
 			return ret;
 		}
 	}
@@ -664,10 +673,10 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		 */
 		usb_hcd_unlink_urb_from_ep(hcd, urb);
 
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 		usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
 				     urb->status);
-		spin_lock(&the_controller->lock);
+		spin_lock_irqsave(&the_controller->lock, flags);
 
 	} else {
 		/* tcp connection is alive */
@@ -679,7 +688,7 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
 		if (!unlink) {
 			spin_unlock(&vdev->priv_lock);
-			spin_unlock(&the_controller->lock);
+			spin_unlock_irqrestore(&the_controller->lock, flags);
 			usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
 			return -ENOMEM;
 		}
@@ -698,7 +707,7 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		spin_unlock(&vdev->priv_lock);
 	}
 
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	usbip_dbg_vhci_hc("leave\n");
 	return 0;
@@ -707,8 +716,9 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
 {
 	struct vhci_unlink *unlink, *tmp;
+	unsigned long flags;
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 	spin_lock(&vdev->priv_lock);
 
 	list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
@@ -742,19 +752,19 @@ static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
 		list_del(&unlink->list);
 
 		spin_unlock(&vdev->priv_lock);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 
 		usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
 				     urb->status);
 
-		spin_lock(&the_controller->lock);
+		spin_lock_irqsave(&the_controller->lock, flags);
 		spin_lock(&vdev->priv_lock);
 
 		kfree(unlink);
 	}
 
 	spin_unlock(&vdev->priv_lock);
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 }
 
 /*
@@ -768,7 +778,7 @@ static void vhci_shutdown_connection(struct usbip_device *ud)
 
 	/* need this? see stub_dev.c */
 	if (ud->tcp_socket) {
-		pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
+		pr_debug("shutdown sockfd %d\n", ud->sockfd);
 		kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
 	}
 
@@ -821,8 +831,9 @@ static void vhci_shutdown_connection(struct usbip_device *ud)
 static void vhci_device_reset(struct usbip_device *ud)
 {
 	struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+	unsigned long flags;
 
-	spin_lock(&ud->lock);
+	spin_lock_irqsave(&ud->lock, flags);
 
 	vdev->speed  = 0;
 	vdev->devid  = 0;
@@ -836,14 +847,16 @@ static void vhci_device_reset(struct usbip_device *ud)
 	}
 	ud->status = VDEV_ST_NULL;
 
-	spin_unlock(&ud->lock);
+	spin_unlock_irqrestore(&ud->lock, flags);
 }
 
 static void vhci_device_unusable(struct usbip_device *ud)
 {
-	spin_lock(&ud->lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ud->lock, flags);
 	ud->status = VDEV_ST_ERROR;
-	spin_unlock(&ud->lock);
+	spin_unlock_irqrestore(&ud->lock, flags);
 }
 
 static void vhci_device_init(struct vhci_device *vdev)
@@ -933,12 +946,13 @@ static int vhci_get_frame_number(struct usb_hcd *hcd)
 static int vhci_bus_suspend(struct usb_hcd *hcd)
 {
 	struct vhci_hcd *vhci = hcd_to_vhci(hcd);
+	unsigned long flags;
 
 	dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
 
-	spin_lock(&vhci->lock);
+	spin_lock_irqsave(&vhci->lock, flags);
 	hcd->state = HC_STATE_SUSPENDED;
-	spin_unlock(&vhci->lock);
+	spin_unlock_irqrestore(&vhci->lock, flags);
 
 	return 0;
 }
@@ -947,15 +961,16 @@ static int vhci_bus_resume(struct usb_hcd *hcd)
 {
 	struct vhci_hcd *vhci = hcd_to_vhci(hcd);
 	int rc = 0;
+	unsigned long flags;
 
 	dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
 
-	spin_lock(&vhci->lock);
+	spin_lock_irqsave(&vhci->lock, flags);
 	if (!HCD_HW_ACCESSIBLE(hcd))
 		rc = -ESHUTDOWN;
 	else
 		hcd->state = HC_STATE_RUNNING;
-	spin_unlock(&vhci->lock);
+	spin_unlock_irqrestore(&vhci->lock, flags);
 
 	return rc;
 }
@@ -1053,17 +1068,18 @@ static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
 	int rhport = 0;
 	int connected = 0;
 	int ret = 0;
+	unsigned long flags;
 
 	hcd = platform_get_drvdata(pdev);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	for (rhport = 0; rhport < VHCI_NPORTS; rhport++)
 		if (the_controller->port_status[rhport] &
 		    USB_PORT_STAT_CONNECTION)
 			connected += 1;
 
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	if (connected > 0) {
 		dev_info(&pdev->dev,
diff --git a/drivers/usb/usbip/vhci_rx.c b/drivers/usb/usbip/vhci_rx.c
index bc4eb0855314..323aa7789989 100644
--- a/drivers/usb/usbip/vhci_rx.c
+++ b/drivers/usb/usbip/vhci_rx.c
@@ -71,10 +71,11 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
 {
 	struct usbip_device *ud = &vdev->ud;
 	struct urb *urb;
+	unsigned long flags;
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 	urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	if (!urb) {
 		pr_err("cannot find a urb of seqnum %u max seqnum %d\n",
@@ -103,9 +104,9 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
 
 	usbip_dbg_vhci_rx("now giveback urb %u\n", pdu->base.seqnum);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 	usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
 
@@ -116,8 +117,9 @@ static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
 						  struct usbip_header *pdu)
 {
 	struct vhci_unlink *unlink, *tmp;
+	unsigned long flags;
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 
 	list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
 		pr_info("unlink->seqnum %lu\n", unlink->seqnum);
@@ -126,12 +128,12 @@ static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
 					  unlink->seqnum);
 			list_del(&unlink->list);
 
-			spin_unlock(&vdev->priv_lock);
+			spin_unlock_irqrestore(&vdev->priv_lock, flags);
 			return unlink;
 		}
 	}
 
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	return NULL;
 }
@@ -141,6 +143,7 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
 {
 	struct vhci_unlink *unlink;
 	struct urb *urb;
+	unsigned long flags;
 
 	usbip_dump_header(pdu);
 
@@ -151,9 +154,9 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
 		return;
 	}
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 	urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	if (!urb) {
 		/*
@@ -170,9 +173,9 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
 		urb->status = pdu->u.ret_unlink.status;
 		pr_info("urb->status %d\n", urb->status);
 
-		spin_lock(&the_controller->lock);
+		spin_lock_irqsave(&the_controller->lock, flags);
 		usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 
 		usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
 				     urb->status);
@@ -184,10 +187,11 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
 static int vhci_priv_tx_empty(struct vhci_device *vdev)
 {
 	int empty = 0;
+	unsigned long flags;
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 	empty = list_empty(&vdev->priv_rx);
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	return empty;
 }
diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c
index 211f43f67ea2..1c7f41a65565 100644
--- a/drivers/usb/usbip/vhci_sysfs.c
+++ b/drivers/usb/usbip/vhci_sysfs.c
@@ -32,23 +32,28 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 {
 	char *s = out;
 	int i = 0;
+	unsigned long flags;
 
 	BUG_ON(!the_controller || !out);
 
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	/*
 	 * output example:
-	 * prt sta spd dev socket           local_busid
-	 * 000 004 000 000         c5a7bb80 1-2.3
-	 * 001 004 000 000         d8cee980 2-3.4
+	 * port sta spd dev      sockfd local_busid
+	 * 0000 004 000 00000000 000003 1-2.3
+	 * 0001 004 000 00000000 000004 2-3.4
 	 *
-	 * IP address can be retrieved from a socket pointer address by looking
-	 * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
-	 * port number and its peer IP address.
+	 * Output includes socket fd instead of socket pointer address to
+	 * avoid leaking kernel memory address in:
+	 *	/sys/devices/platform/vhci_hcd.0/status and in debug output.
+	 * The socket pointer address is not used at the moment and it was
+	 * made visible as a convenient way to find IP address from socket
+	 * pointer address by looking up /proc/net/{tcp,tcp6}. As this opens
+	 * a security hole, the change is made to use sockfd instead.
 	 */
 	out += sprintf(out,
-		       "prt sta spd bus dev socket           local_busid\n");
+		       "prt sta spd bus dev sockfd local_busid\n");
 
 	for (i = 0; i < VHCI_NPORTS; i++) {
 		struct vhci_device *vdev = port_to_vdev(i);
@@ -60,17 +65,17 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 			out += sprintf(out, "%03u %08x ",
 				       vdev->speed, vdev->devid);
 			out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
+			out += sprintf(out, "%06u", vdev->ud.sockfd);
 			out += sprintf(out, "%s", dev_name(&vdev->udev->dev));
 
-		} else {
-			out += sprintf(out, "000 000 000 0000000000000000 0-0");
-		}
+		} else
+			out += sprintf(out, "000 000 000 000000 0-0");
 
 		out += sprintf(out, "\n");
 		spin_unlock(&vdev->ud.lock);
 	}
 
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	return out - s;
 }
@@ -80,11 +85,12 @@ static DEVICE_ATTR_RO(status);
 static int vhci_port_disconnect(__u32 rhport)
 {
 	struct vhci_device *vdev;
+	unsigned long flags;
 
 	usbip_dbg_vhci_sysfs("enter\n");
 
 	/* lock */
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 
 	vdev = port_to_vdev(rhport);
 
@@ -94,14 +100,14 @@ static int vhci_port_disconnect(__u32 rhport)
 
 		/* unlock */
 		spin_unlock(&vdev->ud.lock);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 
 		return -EINVAL;
 	}
 
 	/* unlock */
 	spin_unlock(&vdev->ud.lock);
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 
 	usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
 
@@ -177,6 +183,7 @@ static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
 	int sockfd = 0;
 	__u32 rhport = 0, devid = 0, speed = 0;
 	int err;
+	unsigned long flags;
 
 	/*
 	 * @rhport: port number of vhci_hcd
@@ -202,14 +209,14 @@ static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
 	/* now need lock until setting vdev status as used */
 
 	/* begin a lock */
-	spin_lock(&the_controller->lock);
+	spin_lock_irqsave(&the_controller->lock, flags);
 	vdev = port_to_vdev(rhport);
 	spin_lock(&vdev->ud.lock);
 
 	if (vdev->ud.status != VDEV_ST_NULL) {
 		/* end of the lock */
 		spin_unlock(&vdev->ud.lock);
-		spin_unlock(&the_controller->lock);
+		spin_unlock_irqrestore(&the_controller->lock, flags);
 
 		sockfd_put(socket);
 
@@ -223,11 +230,12 @@ static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
 
 	vdev->devid         = devid;
 	vdev->speed         = speed;
+	vdev->ud.sockfd     = sockfd;
 	vdev->ud.tcp_socket = socket;
 	vdev->ud.status     = VDEV_ST_NOTASSIGNED;
 
 	spin_unlock(&vdev->ud.lock);
-	spin_unlock(&the_controller->lock);
+	spin_unlock_irqrestore(&the_controller->lock, flags);
 	/* end the lock */
 
 	vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
diff --git a/drivers/usb/usbip/vhci_tx.c b/drivers/usb/usbip/vhci_tx.c
index 3c5796c8633a..a9a663a578b6 100644
--- a/drivers/usb/usbip/vhci_tx.c
+++ b/drivers/usb/usbip/vhci_tx.c
@@ -47,16 +47,17 @@ static void setup_cmd_submit_pdu(struct usbip_header *pdup,  struct urb *urb)
 static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
 {
 	struct vhci_priv *priv, *tmp;
+	unsigned long flags;
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 
 	list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
 		list_move_tail(&priv->list, &vdev->priv_rx);
-		spin_unlock(&vdev->priv_lock);
+		spin_unlock_irqrestore(&vdev->priv_lock, flags);
 		return priv;
 	}
 
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	return NULL;
 }
@@ -137,16 +138,17 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)
 static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
 {
 	struct vhci_unlink *unlink, *tmp;
+	unsigned long flags;
 
-	spin_lock(&vdev->priv_lock);
+	spin_lock_irqsave(&vdev->priv_lock, flags);
 
 	list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
 		list_move_tail(&unlink->list, &vdev->unlink_rx);
-		spin_unlock(&vdev->priv_lock);
+		spin_unlock_irqrestore(&vdev->priv_lock, flags);
 		return unlink;
 	}
 
-	spin_unlock(&vdev->priv_lock);
+	spin_unlock_irqrestore(&vdev->priv_lock, flags);
 
 	return NULL;
 }
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index d6aeb84e90b6..d882d873c5a3 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -178,11 +178,8 @@ ext2_get_acl(struct inode *inode, int type)
 	return acl;
 }
 
-/*
- * inode->i_mutex: down
- */
-int
-ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+static int
+__ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 {
 	int name_index;
 	void *value = NULL;
@@ -192,13 +189,6 @@ ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 	switch(type) {
 		case ACL_TYPE_ACCESS:
 			name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
-			if (acl) {
-				error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
-				if (error)
-					return error;
-				inode->i_ctime = CURRENT_TIME_SEC;
-				mark_inode_dirty(inode);
-			}
 			break;
 
 		case ACL_TYPE_DEFAULT:
@@ -225,6 +215,24 @@ ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 }
 
 /*
+ * inode->i_mutex: down
+ */
+int
+ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+{
+	int error;
+
+	if (type == ACL_TYPE_ACCESS && acl) {
+		error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
+		if (error)
+			return error;
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+	}
+	return __ext2_set_acl(inode, acl, type);
+}
+
+/*
  * Initialize the ACLs of a new inode. Called from ext2_new_inode.
  *
  * dir->i_mutex: down
@@ -241,12 +249,12 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
 		return error;
 
 	if (default_acl) {
-		error = ext2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+		error = __ext2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
 		posix_acl_release(default_acl);
 	}
 	if (acl) {
 		if (!error)
-			error = ext2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+			error = __ext2_set_acl(inode, acl, ACL_TYPE_ACCESS);
 		posix_acl_release(acl);
 	}
 	return error;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 62376451bbce..5df914943d96 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -113,6 +113,10 @@ void f_setown(struct file *filp, unsigned long arg, int force)
 	int who = arg;
 	type = PIDTYPE_PID;
 	if (who < 0) {
+		/* avoid overflow below */
+		if (who == INT_MIN)
+			return;
+
 		type = PIDTYPE_PGID;
 		who = -who;
 	}
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index a260060042ad..67eb154af881 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -60,9 +60,10 @@ int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
 			else
 				GROUP_AT(gi, i) = GROUP_AT(rqgi, i);
 
-			/* Each thread allocates its own gi, no race */
-			groups_sort(gi);
 		}
+
+		/* Each thread allocates its own gi, no race */
+		groups_sort(gi);
 	} else {
 		gi = get_group_info(rqgi);
 	}
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index dc198bc64c61..edc8ef78b63f 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -513,9 +513,17 @@ static void __discard_prealloc(struct reiserfs_transaction_handle *th,
 			       "inode has negative prealloc blocks count.");
 #endif
 	while (ei->i_prealloc_count > 0) {
-		reiserfs_free_prealloc_block(th, inode, ei->i_prealloc_block);
-		ei->i_prealloc_block++;
+		b_blocknr_t block_to_free;
+
+		/*
+		 * reiserfs_free_prealloc_block can drop the write lock,
+		 * which could allow another caller to free the same block.
+		 * We can protect against it by modifying the prealloc
+		 * state before calling it.
+		 */
+		block_to_free = ei->i_prealloc_block++;
 		ei->i_prealloc_count--;
+		reiserfs_free_prealloc_block(th, inode, block_to_free);
 		dirty = 1;
 	}
 	if (dirty)
@@ -1128,7 +1136,7 @@ static int determine_prealloc_size(reiserfs_blocknr_hint_t * hint)
 	hint->prealloc_size = 0;
 
 	if (!hint->formatted_node && hint->preallocate) {
-		if (S_ISREG(hint->inode->i_mode)
+		if (S_ISREG(hint->inode->i_mode) && !IS_PRIVATE(hint->inode)
 		    && hint->inode->i_size >=
 		    REISERFS_SB(hint->th->t_super)->s_alloc_options.
 		    preallocmin * hint->inode->i_sb->s_blocksize)
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index 9b1824f35501..91b036902a17 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -37,7 +37,14 @@ reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 	error = journal_begin(&th, inode->i_sb, jcreate_blocks);
 	reiserfs_write_unlock(inode->i_sb);
 	if (error == 0) {
+		if (type == ACL_TYPE_ACCESS && acl) {
+			error = posix_acl_update_mode(inode, &inode->i_mode,
+						      &acl);
+			if (error)
+				goto unlock;
+		}
 		error = __reiserfs_set_acl(&th, inode, type, acl);
+unlock:
 		reiserfs_write_lock(inode->i_sb);
 		error2 = journal_end(&th);
 		reiserfs_write_unlock(inode->i_sb);
@@ -245,11 +252,6 @@ __reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
 	switch (type) {
 	case ACL_TYPE_ACCESS:
 		name = POSIX_ACL_XATTR_ACCESS;
-		if (acl) {
-			error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
-			if (error)
-				return error;
-		}
 		break;
 	case ACL_TYPE_DEFAULT:
 		name = POSIX_ACL_XATTR_DEFAULT;
diff --git a/fs/sdcardfs/inode.c b/fs/sdcardfs/inode.c
index da5aa1dfc6b1..1169a3c16380 100644
--- a/fs/sdcardfs/inode.c
+++ b/fs/sdcardfs/inode.c
@@ -625,6 +625,8 @@ static int sdcardfs_permission(struct vfsmount *mnt, struct inode *inode, int ma
 	struct inode tmp;
 	struct sdcardfs_inode_data *top = top_data_get(SDCARDFS_I(inode));
 
+	if (IS_ERR(mnt))
+		return PTR_ERR(mnt);
 	if (!top)
 		return -EINVAL;
 
diff --git a/fs/select.c b/fs/select.c
index 09e71a00a9b8..3d38808dbcb6 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -29,6 +29,7 @@
 #include <linux/sched/rt.h>
 #include <linux/freezer.h>
 #include <net/busy_poll.h>
+#include <linux/vmalloc.h>
 
 #include <asm/uaccess.h>
 
@@ -550,7 +551,7 @@ int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
 	fd_set_bits fds;
 	void *bits;
 	int ret, max_fds;
-	unsigned int size;
+	size_t size, alloc_size;
 	struct fdtable *fdt;
 	/* Allocate small arguments on the stack to save memory and be faster */
 	long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
@@ -577,7 +578,14 @@ int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
 	if (size > sizeof(stack_fds) / 6) {
 		/* Not enough space in on-stack array; must use kmalloc */
 		ret = -ENOMEM;
-		bits = kmalloc(6 * size, GFP_KERNEL);
+		if (size > (SIZE_MAX / 6))
+			goto out_nofds;
+
+		alloc_size = 6 * size;
+		bits = kmalloc(alloc_size, GFP_KERNEL|__GFP_NOWARN);
+		if (!bits && alloc_size > PAGE_SIZE)
+			bits = vmalloc(alloc_size);
+
 		if (!bits)
 			goto out_nofds;
 	}
@@ -614,7 +622,7 @@ int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
 
 out:
 	if (bits != stack_fds)
-		kfree(bits);
+		kvfree(bits);
 out_nofds:
 	return ret;
 }
diff --git a/fs/xattr.c b/fs/xattr.c
index 76f01bf4b048..a40f49cc04c3 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -70,7 +70,7 @@ xattr_permission(struct inode *inode, const char *name, int mask)
 			return -EPERM;
 	}
 
-	return inode_permission(inode, mask);
+	return inode_permission2(ERR_PTR(-EOPNOTSUPP), inode, mask);
 }
 
 /**
diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h
index 2189935075b4..a951fd10aaaa 100644
--- a/include/linux/cacheinfo.h
+++ b/include/linux/cacheinfo.h
@@ -71,6 +71,7 @@ struct cpu_cacheinfo {
 	struct cacheinfo *info_list;
 	unsigned int num_levels;
 	unsigned int num_leaves;
+	bool cpu_map_populated;
 };
 
 /*
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 2b6a204bd8d4..3ffc69ebe967 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -64,6 +64,13 @@ static inline ktime_t ktime_set(const s64 secs, const unsigned long nsecs)
 		({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; })
 
 /*
+ * Same as ktime_add(), but avoids undefined behaviour on overflow; however,
+ * this means that you must check the result for overflow yourself.
+ */
+#define ktime_add_unsafe(lhs, rhs) \
+		({ (ktime_t){ .tv64 = (u64) (lhs).tv64 + (rhs).tv64 }; })
+
+/*
  * Add a ktime_t variable and a scalar nanosecond value.
  * res = kt + nsval:
  */
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 04078e8a4803..d6c53fce006b 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -243,6 +243,10 @@ int xt_check_entry_offsets(const void *base, const char *elems,
 			   unsigned int target_offset,
 			   unsigned int next_offset);
 
+unsigned int *xt_alloc_entry_offsets(unsigned int size);
+bool xt_find_jump_offset(const unsigned int *offsets,
+			 unsigned int target, unsigned int size);
+
 int xt_check_match(struct xt_mtchk_param *, unsigned int size, u_int8_t proto,
 		   bool inv_proto);
 int xt_check_target(struct xt_tgchk_param *, unsigned int size, u_int8_t proto,
@@ -377,16 +381,16 @@ static inline unsigned long ifname_compare_aligned(const char *_a,
  * allows us to return 0 for single core systems without forcing
  * callers to deal with SMP vs. NONSMP issues.
  */
-static inline u64 xt_percpu_counter_alloc(void)
+static inline unsigned long xt_percpu_counter_alloc(void)
 {
 	if (nr_cpu_ids > 1) {
 		void __percpu *res = __alloc_percpu(sizeof(struct xt_counters),
 						    sizeof(struct xt_counters));
 
 		if (res == NULL)
-			return (u64) -ENOMEM;
+			return -ENOMEM;
 
-		return (u64) (__force unsigned long) res;
+		return (__force unsigned long) res;
 	}
 
 	return 0;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d9af852bbd63..e32741c1d4e1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1539,6 +1539,7 @@ struct sched_dl_entity {
 	u64 dl_deadline;	/* relative deadline of each instance	*/
 	u64 dl_period;		/* separation of two instances (period) */
 	u64 dl_bw;		/* dl_runtime / dl_deadline		*/
+	u64 dl_density;		/* dl_runtime / dl_deadline		*/
 
 	/*
 	 * Actual scheduling parameters. Initialized with the values above,
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 318c24612458..2260f92f1492 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -29,9 +29,14 @@ static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
 	return (struct tcphdr *)skb_transport_header(skb);
 }
 
+static inline unsigned int __tcp_hdrlen(const struct tcphdr *th)
+{
+	return th->doff * 4;
+}
+
 static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
 {
-	return tcp_hdr(skb)->doff * 4;
+	return __tcp_hdrlen(tcp_hdr(skb));
 }
 
 static inline struct tcphdr *inner_tcp_hdr(const struct sk_buff *skb)
diff --git a/include/linux/vermagic.h b/include/linux/vermagic.h
index a3d04934aa96..6f8fbcf10dfb 100644
--- a/include/linux/vermagic.h
+++ b/include/linux/vermagic.h
@@ -24,16 +24,10 @@
 #ifndef MODULE_ARCH_VERMAGIC
 #define MODULE_ARCH_VERMAGIC ""
 #endif
-#ifdef RETPOLINE
-#define MODULE_VERMAGIC_RETPOLINE "retpoline "
-#else
-#define MODULE_VERMAGIC_RETPOLINE ""
-#endif
 
 #define VERMAGIC_STRING 						\
 	UTS_RELEASE " "							\
 	MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT 			\
 	MODULE_VERMAGIC_MODULE_UNLOAD MODULE_VERMAGIC_MODVERSIONS	\
-	MODULE_ARCH_VERMAGIC						\
-	MODULE_VERMAGIC_RETPOLINE
+	MODULE_ARCH_VERMAGIC
 
diff --git a/include/net/arp.h b/include/net/arp.h
index 5e0f891d476c..1b3f86981757 100644
--- a/include/net/arp.h
+++ b/include/net/arp.h
@@ -19,6 +19,9 @@ static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32
 
 static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
 {
+	if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
+		key = INADDR_ANY;
+
 	return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev);
 }
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 7a8066b90289..84f0d0602433 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -281,6 +281,7 @@ int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
 			   int flags);
 int ip6_flowlabel_init(void);
 void ip6_flowlabel_cleanup(void);
+bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np);
 
 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 {
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 2dcea635ecce..93328c61934a 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -209,6 +209,11 @@ int net_eq(const struct net *net1, const struct net *net2)
 	return net1 == net2;
 }
 
+static inline int check_net(const struct net *net)
+{
+	return atomic_read(&net->count) != 0;
+}
+
 void net_drop_ns(void *);
 
 #else
@@ -233,6 +238,11 @@ int net_eq(const struct net *net1, const struct net *net2)
 	return 1;
 }
 
+static inline int check_net(const struct net *net)
+{
+	return 1;
+}
+
 #define net_drop_ns NULL
 #endif
 
diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index 47d6342b1c48..b9670d44654a 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -26,6 +26,19 @@
 #define EPOLL_CTL_DEL 2
 #define EPOLL_CTL_MOD 3
 
+/* Epoll event masks */
+#define EPOLLIN		0x00000001
+#define EPOLLPRI	0x00000002
+#define EPOLLOUT	0x00000004
+#define EPOLLERR	0x00000008
+#define EPOLLHUP	0x00000010
+#define EPOLLRDNORM	0x00000040
+#define EPOLLRDBAND	0x00000080
+#define EPOLLWRNORM	0x00000100
+#define EPOLLWRBAND	0x00000200
+#define EPOLLMSG	0x00000400
+#define EPOLLRDHUP	0x00002000
+
 /*
  * Request the handling of system wakeup events so as to prevent system suspends
  * from happening while those events are being processed.
diff --git a/ipc/msg.c b/ipc/msg.c
index c6521c205cb4..f993f441f852 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -742,7 +742,10 @@ static inline int convert_mode(long *msgtyp, int msgflg)
 	if (*msgtyp == 0)
 		return SEARCH_ANY;
 	if (*msgtyp < 0) {
-		*msgtyp = -*msgtyp;
+		if (*msgtyp == LONG_MIN) /* -LONG_MIN is undefined */
+			*msgtyp = LONG_MAX;
+		else
+			*msgtyp = -*msgtyp;
 		return SEARCH_LESSEQUAL;
 	}
 	if (msgflg & MSG_EXCEPT)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8db48e263f8e..59ba1d1266a7 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2289,6 +2289,7 @@ void __dl_clear_params(struct task_struct *p)
 	dl_se->dl_period = 0;
 	dl_se->flags = 0;
 	dl_se->dl_bw = 0;
+	dl_se->dl_density = 0;
 
 	dl_se->dl_throttled = 0;
 	dl_se->dl_new = 1;
@@ -3991,6 +3992,7 @@ __setparam_dl(struct task_struct *p, const struct sched_attr *attr)
 	dl_se->dl_period = attr->sched_period ?: dl_se->dl_deadline;
 	dl_se->flags = attr->sched_flags;
 	dl_se->dl_bw = to_ratio(dl_se->dl_period, dl_se->dl_runtime);
+	dl_se->dl_density = to_ratio(dl_se->dl_deadline, dl_se->dl_runtime);
 
 	/*
 	 * Changing the parameters of a task is 'tricky' and we're not doing
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 105f6cdac6fc..188c8388a63f 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -502,13 +502,84 @@ static bool dl_entity_overflow(struct sched_dl_entity *dl_se,
 }
 
 /*
- * When a -deadline entity is queued back on the runqueue, its runtime and
- * deadline might need updating.
+ * Revised wakeup rule [1]: For self-suspending tasks, rather then
+ * re-initializing task's runtime and deadline, the revised wakeup
+ * rule adjusts the task's runtime to avoid the task to overrun its
+ * density.
  *
- * The policy here is that we update the deadline of the entity only if:
- *  - the current deadline is in the past,
- *  - using the remaining runtime with the current deadline would make
- *    the entity exceed its bandwidth.
+ * Reasoning: a task may overrun the density if:
+ *    runtime / (deadline - t) > dl_runtime / dl_deadline
+ *
+ * Therefore, runtime can be adjusted to:
+ *     runtime = (dl_runtime / dl_deadline) * (deadline - t)
+ *
+ * In such way that runtime will be equal to the maximum density
+ * the task can use without breaking any rule.
+ *
+ * [1] Luca Abeni, Giuseppe Lipari, and Juri Lelli. 2015. Constant
+ * bandwidth server revisited. SIGBED Rev. 11, 4 (January 2015), 19-24.
+ */
+static void
+update_dl_revised_wakeup(struct sched_dl_entity *dl_se, struct rq *rq)
+{
+	u64 laxity = dl_se->deadline - rq_clock(rq);
+
+	/*
+	 * If the task has deadline < period, and the deadline is in the past,
+	 * it should already be throttled before this check.
+	 *
+	 * See update_dl_entity() comments for further details.
+	 */
+	WARN_ON(dl_time_before(dl_se->deadline, rq_clock(rq)));
+
+	dl_se->runtime = (dl_se->dl_density * laxity) >> 20;
+}
+
+/*
+ * Regarding the deadline, a task with implicit deadline has a relative
+ * deadline == relative period. A task with constrained deadline has a
+ * relative deadline <= relative period.
+ *
+ * We support constrained deadline tasks. However, there are some restrictions
+ * applied only for tasks which do not have an implicit deadline. See
+ * update_dl_entity() to know more about such restrictions.
+ *
+ * The dl_is_implicit() returns true if the task has an implicit deadline.
+ */
+static inline bool dl_is_implicit(struct sched_dl_entity *dl_se)
+{
+	return dl_se->dl_deadline == dl_se->dl_period;
+}
+
+/*
+ * When a deadline entity is placed in the runqueue, its runtime and deadline
+ * might need to be updated. This is done by a CBS wake up rule. There are two
+ * different rules: 1) the original CBS; and 2) the Revisited CBS.
+ *
+ * When the task is starting a new period, the Original CBS is used. In this
+ * case, the runtime is replenished and a new absolute deadline is set.
+ *
+ * When a task is queued before the begin of the next period, using the
+ * remaining runtime and deadline could make the entity to overflow, see
+ * dl_entity_overflow() to find more about runtime overflow. When such case
+ * is detected, the runtime and deadline need to be updated.
+ *
+ * If the task has an implicit deadline, i.e., deadline == period, the Original
+ * CBS is applied. the runtime is replenished and a new absolute deadline is
+ * set, as in the previous cases.
+ *
+ * However, the Original CBS does not work properly for tasks with
+ * deadline < period, which are said to have a constrained deadline. By
+ * applying the Original CBS, a constrained deadline task would be able to run
+ * runtime/deadline in a period. With deadline < period, the task would
+ * overrun the runtime/period allowed bandwidth, breaking the admission test.
+ *
+ * In order to prevent this misbehave, the Revisited CBS is used for
+ * constrained deadline tasks when a runtime overflow is detected. In the
+ * Revisited CBS, rather than replenishing & setting a new absolute deadline,
+ * the remaining runtime of the task is reduced to avoid runtime overflow.
+ * Please refer to the comments update_dl_revised_wakeup() function to find
+ * more about the Revised CBS rule.
  */
 static void update_dl_entity(struct sched_dl_entity *dl_se,
 			     struct sched_dl_entity *pi_se)
@@ -530,6 +601,14 @@ static void update_dl_entity(struct sched_dl_entity *dl_se,
 
 	if (dl_time_before(dl_se->deadline, rq_clock(rq)) ||
 	    dl_entity_overflow(dl_se, pi_se, rq_clock(rq))) {
+
+		if (unlikely(!dl_is_implicit(dl_se) &&
+			     !dl_time_before(dl_se->deadline, rq_clock(rq)) &&
+			     !dl_se->dl_boosted)){
+			update_dl_revised_wakeup(dl_se, rq);
+			return;
+		}
+
 		dl_se->deadline = rq_clock(rq) + pi_se->dl_deadline;
 		dl_se->runtime = pi_se->dl_runtime;
 	}
@@ -1054,11 +1133,6 @@ static void dequeue_dl_entity(struct sched_dl_entity *dl_se)
 	__dequeue_dl_entity(dl_se);
 }
 
-static inline bool dl_is_constrained(struct sched_dl_entity *dl_se)
-{
-	return dl_se->dl_deadline < dl_se->dl_period;
-}
-
 static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags)
 {
 	struct task_struct *pi_task = rt_mutex_get_top_task(p);
@@ -1090,7 +1164,7 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags)
 	 * If that is the case, the task will be throttled and
 	 * the replenishment timer will be set to the next period.
 	 */
-	if (!p->dl.dl_throttled && dl_is_constrained(&p->dl))
+	if (!p->dl.dl_throttled && !dl_is_implicit(&p->dl))
 		dl_check_constrained_dl(&p->dl);
 
 	/*
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index e7c2392666cb..0605755c246f 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -312,7 +312,7 @@ EXPORT_SYMBOL_GPL(__ktime_divns);
  */
 ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs)
 {
-	ktime_t res = ktime_add(lhs, rhs);
+	ktime_t res = ktime_add_unsafe(lhs, rhs);
 
 	/*
 	 * We use KTIME_SEC_MAX here, the maximum timeout which we can
@@ -669,7 +669,9 @@ static void hrtimer_reprogram(struct hrtimer *timer,
 static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base)
 {
 	base->expires_next.tv64 = KTIME_MAX;
+	base->hang_detected = 0;
 	base->hres_active = 0;
+	base->next_timer = NULL;
 }
 
 /*
@@ -1587,6 +1589,7 @@ static void init_hrtimers_cpu(int cpu)
 		timerqueue_init_head(&cpu_base->clock_base[i].active);
 	}
 
+	cpu_base->active_bases = 0;
 	cpu_base->cpu = cpu;
 	hrtimer_init_hres(cpu_base);
 }
diff --git a/mm/cma.c b/mm/cma.c
index 20e661a501a6..c0b5ea6d8331 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -55,7 +55,7 @@ unsigned long cma_get_size(const struct cma *cma)
 }
 
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
-					     int align_order)
+					     unsigned int align_order)
 {
 	if (align_order <= cma->order_per_bit)
 		return 0;
@@ -63,17 +63,14 @@ static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
 }
 
 /*
- * Find a PFN aligned to the specified order and return an offset represented in
- * order_per_bits.
+ * Find the offset of the base PFN from the specified align_order.
+ * The value returned is represented in order_per_bits.
  */
 static unsigned long cma_bitmap_aligned_offset(const struct cma *cma,
-					       int align_order)
+					       unsigned int align_order)
 {
-	if (align_order <= cma->order_per_bit)
-		return 0;
-
-	return (ALIGN(cma->base_pfn, (1UL << align_order))
-		- cma->base_pfn) >> cma->order_per_bit;
+	return (cma->base_pfn & ((1UL << align_order) - 1))
+		>> cma->order_per_bit;
 }
 
 static unsigned long cma_bitmap_pages_to_bits(const struct cma *cma,
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e25b93a4267d..55a9facb8e8d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5576,7 +5576,7 @@ static void uncharge_list(struct list_head *page_list)
 		next = page->lru.next;
 
 		VM_BUG_ON_PAGE(PageLRU(page), page);
-		VM_BUG_ON_PAGE(page_count(page), page);
+		VM_BUG_ON_PAGE(!PageHWPoison(page) && page_count(page), page);
 
 		if (!page->mem_cgroup)
 			continue;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 14c1c5cb3ccf..d4271ebc37d0 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -539,6 +539,13 @@ static int delete_from_lru_cache(struct page *p)
 		 */
 		ClearPageActive(p);
 		ClearPageUnevictable(p);
+
+		/*
+		 * Poisoned page might never drop its ref count to 0 so we have
+		 * to uncharge it manually from its memcg.
+		 */
+		mem_cgroup_uncharge(p);
+
 		/*
 		 * drop the page count elevated by isolate_lru_page()
 		 */
diff --git a/mm/mmap.c b/mm/mmap.c
index 2d5b7b08e535..2339b533f4b2 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2218,7 +2218,8 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
 		gap_addr = TASK_SIZE;
 
 	next = vma->vm_next;
-	if (next && next->vm_start < gap_addr) {
+	if (next && next->vm_start < gap_addr &&
+			(next->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) {
 		if (!(next->vm_flags & VM_GROWSUP))
 			return -ENOMEM;
 		/* Check that both stack segments have the same anon_vma? */
@@ -2303,7 +2304,8 @@ int expand_downwards(struct vm_area_struct *vma,
 	if (gap_addr > address)
 		return -ENOMEM;
 	prev = vma->vm_prev;
-	if (prev && prev->vm_end > gap_addr) {
+	if (prev && prev->vm_end > gap_addr &&
+			(prev->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) {
 		if (!(prev->vm_flags & VM_GROWSDOWN))
 			return -ENOMEM;
 		/* Check that both stack segments have the same anon_vma? */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 496bcba7d367..3c3d8139f594 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2545,9 +2545,6 @@ static bool __zone_watermark_ok(struct zone *z, unsigned int order,
 		if (!area->nr_free)
 			continue;
 
-		if (alloc_harder)
-			return true;
-
 		for (mt = 0; mt < MIGRATE_PCPTYPES; mt++) {
 #ifdef CONFIG_CMA
 			/*
@@ -2567,6 +2564,9 @@ static bool __zone_watermark_ok(struct zone *z, unsigned int order,
 			return true;
 		}
 #endif
+		if (alloc_harder &&
+			!list_empty(&area->free_list[MIGRATE_HIGHATOMIC]))
+			return true;
 	}
 	return false;
 }
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 928f58064098..c866e761651a 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -722,13 +722,12 @@ static int can_rcv(struct sk_buff *skb, struct net_device *dev,
 	if (unlikely(!net_eq(dev_net(dev), &init_net)))
 		goto drop;
 
-	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
-		      skb->len != CAN_MTU ||
-		      cfd->len > CAN_MAX_DLEN,
-		      "PF_CAN: dropped non conform CAN skbuf: "
-		      "dev type %d, len %d, datalen %d\n",
-		      dev->type, skb->len, cfd->len))
+	if (unlikely(dev->type != ARPHRD_CAN || skb->len != CAN_MTU ||
+		     cfd->len > CAN_MAX_DLEN)) {
+		pr_warn_once("PF_CAN: dropped non conform CAN skbuf: dev type %d, len %d, datalen %d\n",
+			     dev->type, skb->len, cfd->len);
 		goto drop;
+	}
 
 	can_receive(skb, dev);
 	return NET_RX_SUCCESS;
@@ -746,13 +745,12 @@ static int canfd_rcv(struct sk_buff *skb, struct net_device *dev,
 	if (unlikely(!net_eq(dev_net(dev), &init_net)))
 		goto drop;
 
-	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
-		      skb->len != CANFD_MTU ||
-		      cfd->len > CANFD_MAX_DLEN,
-		      "PF_CAN: dropped non conform CAN FD skbuf: "
-		      "dev type %d, len %d, datalen %d\n",
-		      dev->type, skb->len, cfd->len))
+	if (unlikely(dev->type != ARPHRD_CAN || skb->len != CANFD_MTU ||
+		     cfd->len > CANFD_MAX_DLEN)) {
+		pr_warn_once("PF_CAN: dropped non conform CAN FD skbuf: dev type %d, len %d, datalen %d\n",
+			     dev->type, skb->len, cfd->len);
 		goto drop;
+	}
 
 	can_receive(skb, dev);
 	return NET_RX_SUCCESS;
diff --git a/net/core/dev.c b/net/core/dev.c
index cb6a2ad2c91e..1c79e01d283f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2895,10 +2895,21 @@ static void qdisc_pkt_len_init(struct sk_buff *skb)
 		hdr_len = skb_transport_header(skb) - skb_mac_header(skb);
 
 		/* + transport layer */
-		if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)))
-			hdr_len += tcp_hdrlen(skb);
-		else
-			hdr_len += sizeof(struct udphdr);
+		if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))) {
+			const struct tcphdr *th;
+			struct tcphdr _tcphdr;
+
+			th = skb_header_pointer(skb, skb_transport_offset(skb),
+						sizeof(_tcphdr), &_tcphdr);
+			if (likely(th))
+				hdr_len += __tcp_hdrlen(th);
+		} else {
+			struct udphdr _udphdr;
+
+			if (skb_header_pointer(skb, skb_transport_offset(skb),
+					       sizeof(_udphdr), &_udphdr))
+				hdr_len += sizeof(struct udphdr);
+		}
 
 		if (shinfo->gso_type & SKB_GSO_DODGY)
 			gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 5ec5502d7360..875555959ed0 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -527,8 +527,8 @@ ip_proto_again:
 out_good:
 	ret = true;
 
-	key_control->thoff = (u16)nhoff;
 out:
+	key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
 	key_basic->n_proto = proto;
 	key_basic->ip_proto = ip_proto;
 
@@ -536,7 +536,6 @@ out:
 
 out_bad:
 	ret = false;
-	key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
 	goto out;
 }
 EXPORT_SYMBOL(__skb_flow_dissect);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 54ab748238d1..eff329e9c23b 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -496,7 +496,7 @@ struct neighbour *__neigh_create(struct neigh_table *tbl, const void *pkey,
 	if (atomic_read(&tbl->entries) > (1 << nht->hash_shift))
 		nht = neigh_hash_grow(tbl, nht->hash_shift + 1);
 
-	hash_val = tbl->hash(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
+	hash_val = tbl->hash(n->primary_key, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
 
 	if (n->parms->dead) {
 		rc = ERR_PTR(-EINVAL);
@@ -508,7 +508,7 @@ struct neighbour *__neigh_create(struct neigh_table *tbl, const void *pkey,
 	     n1 != NULL;
 	     n1 = rcu_dereference_protected(n1->next,
 			lockdep_is_held(&tbl->lock))) {
-		if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
+		if (dev == n1->dev && !memcmp(n1->primary_key, n->primary_key, key_len)) {
 			if (want_ref)
 				neigh_hold(n1);
 			rc = n1;
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 5e3a7302f774..7753681195c1 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -140,6 +140,9 @@ static void ccid2_hc_tx_rto_expire(unsigned long data)
 
 	ccid2_pr_debug("RTO_EXPIRE\n");
 
+	if (sk->sk_state == DCCP_CLOSED)
+		goto out;
+
 	/* back-off timer */
 	hc->tx_rto <<= 1;
 	if (hc->tx_rto > DCCP_RTO_MAX)
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 711b4dfa17c3..cb5eb649ad5f 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -223,11 +223,16 @@ static bool arp_key_eq(const struct neighbour *neigh, const void *pkey)
 
 static int arp_constructor(struct neighbour *neigh)
 {
-	__be32 addr = *(__be32 *)neigh->primary_key;
+	__be32 addr;
 	struct net_device *dev = neigh->dev;
 	struct in_device *in_dev;
 	struct neigh_parms *parms;
+	u32 inaddr_any = INADDR_ANY;
 
+	if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
+		memcpy(neigh->primary_key, &inaddr_any, arp_tbl.key_len);
+
+	addr = *(__be32 *)neigh->primary_key;
 	rcu_read_lock();
 	in_dev = __in_dev_get_rcu(dev);
 	if (!in_dev) {
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index b60106d34346..8212ed80da48 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -338,7 +338,7 @@ static __be32 igmpv3_get_srcaddr(struct net_device *dev,
 		return htonl(INADDR_ANY);
 
 	for_ifa(in_dev) {
-		if (inet_ifa_match(fl4->saddr, ifa))
+		if (fl4->saddr == ifa->ifa_local)
 			return fl4->saddr;
 	} endfor_ifa(in_dev);
 
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 6e3e0e8b1ce3..4cfcc22f7430 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -367,23 +367,12 @@ static inline bool unconditional(const struct arpt_entry *e)
 	       memcmp(&e->arp, &uncond, sizeof(uncond)) == 0;
 }
 
-static bool find_jump_target(const struct xt_table_info *t,
-			     const struct arpt_entry *target)
-{
-	struct arpt_entry *iter;
-
-	xt_entry_foreach(iter, t->entries, t->size) {
-		 if (iter == target)
-			return true;
-	}
-	return false;
-}
-
 /* Figures out from what hook each rule can be called: returns 0 if
  * there are loops.  Puts hook bitmask in comefrom.
  */
 static int mark_source_chains(const struct xt_table_info *newinfo,
-			      unsigned int valid_hooks, void *entry0)
+			      unsigned int valid_hooks, void *entry0,
+			      unsigned int *offsets)
 {
 	unsigned int hook;
 
@@ -472,10 +461,11 @@ static int mark_source_chains(const struct xt_table_info *newinfo,
 					/* This a jump; chase it. */
 					duprintf("Jump rule %u -> %u\n",
 						 pos, newpos);
+					if (!xt_find_jump_offset(offsets, newpos,
+								 newinfo->number))
+						return 0;
 					e = (struct arpt_entry *)
 						(entry0 + newpos);
-					if (!find_jump_target(newinfo, e))
-						return 0;
 				} else {
 					/* ... this is a fallthru */
 					newpos = pos + e->next_offset;
@@ -521,11 +511,13 @@ find_check_entry(struct arpt_entry *e, const char *name, unsigned int size)
 {
 	struct xt_entry_target *t;
 	struct xt_target *target;
+	unsigned long pcnt;
 	int ret;
 
-	e->counters.pcnt = xt_percpu_counter_alloc();
-	if (IS_ERR_VALUE(e->counters.pcnt))
+	pcnt = xt_percpu_counter_alloc();
+	if (IS_ERR_VALUE(pcnt))
 		return -ENOMEM;
+	e->counters.pcnt = pcnt;
 
 	t = arpt_get_target(e);
 	target = xt_request_find_target(NFPROTO_ARP, t->u.user.name,
@@ -642,6 +634,7 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 			   const struct arpt_replace *repl)
 {
 	struct arpt_entry *iter;
+	unsigned int *offsets;
 	unsigned int i;
 	int ret = 0;
 
@@ -655,6 +648,9 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 	}
 
 	duprintf("translate_table: size %u\n", newinfo->size);
+	offsets = xt_alloc_entry_offsets(newinfo->number);
+	if (!offsets)
+		return -ENOMEM;
 	i = 0;
 
 	/* Walk through entries, checking offsets. */
@@ -665,7 +661,9 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 						 repl->underflow,
 						 repl->valid_hooks);
 		if (ret != 0)
-			break;
+			goto out_free;
+		if (i < repl->num_entries)
+			offsets[i] = (void *)iter - entry0;
 		++i;
 		if (strcmp(arpt_get_target(iter)->u.user.name,
 		    XT_ERROR_TARGET) == 0)
@@ -673,12 +671,13 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 	}
 	duprintf("translate_table: ARPT_ENTRY_ITERATE gives %d\n", ret);
 	if (ret != 0)
-		return ret;
+		goto out_free;
 
+	ret = -EINVAL;
 	if (i != repl->num_entries) {
 		duprintf("translate_table: %u not %u entries\n",
 			 i, repl->num_entries);
-		return -EINVAL;
+		goto out_free;
 	}
 
 	/* Check hooks all assigned */
@@ -689,17 +688,20 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 		if (newinfo->hook_entry[i] == 0xFFFFFFFF) {
 			duprintf("Invalid hook entry %u %u\n",
 				 i, repl->hook_entry[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 		if (newinfo->underflow[i] == 0xFFFFFFFF) {
 			duprintf("Invalid underflow %u %u\n",
 				 i, repl->underflow[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 	}
 
-	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0))
-		return -ELOOP;
+	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0, offsets)) {
+		ret = -ELOOP;
+		goto out_free;
+	}
+	kvfree(offsets);
 
 	/* Finally, each sanity check must pass */
 	i = 0;
@@ -720,6 +722,9 @@ static int translate_table(struct xt_table_info *newinfo, void *entry0,
 	}
 
 	return ret;
+ out_free:
+	kvfree(offsets);
+	return ret;
 }
 
 static void get_counters(const struct xt_table_info *t,
@@ -1336,8 +1341,8 @@ static int translate_compat_table(struct xt_table_info **pinfo,
 
 	newinfo->number = compatr->num_entries;
 	for (i = 0; i < NF_ARP_NUMHOOKS; i++) {
-		newinfo->hook_entry[i] = info->hook_entry[i];
-		newinfo->underflow[i] = info->underflow[i];
+		newinfo->hook_entry[i] = compatr->hook_entry[i];
+		newinfo->underflow[i] = compatr->underflow[i];
 	}
 	entry1 = newinfo->entries;
 	pos = entry1;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index a399c5419622..a98173d1ea97 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -443,23 +443,12 @@ ipt_do_table(struct sk_buff *skb,
 #endif
 }
 
-static bool find_jump_target(const struct xt_table_info *t,
-			     const struct ipt_entry *target)
-{
-	struct ipt_entry *iter;
-
-	xt_entry_foreach(iter, t->entries, t->size) {
-		 if (iter == target)
-			return true;
-	}
-	return false;
-}
-
 /* Figures out from what hook each rule can be called: returns 0 if
    there are loops.  Puts hook bitmask in comefrom. */
 static int
 mark_source_chains(const struct xt_table_info *newinfo,
-		   unsigned int valid_hooks, void *entry0)
+		   unsigned int valid_hooks, void *entry0,
+		   unsigned int *offsets)
 {
 	unsigned int hook;
 
@@ -552,10 +541,11 @@ mark_source_chains(const struct xt_table_info *newinfo,
 					/* This a jump; chase it. */
 					duprintf("Jump rule %u -> %u\n",
 						 pos, newpos);
+					if (!xt_find_jump_offset(offsets, newpos,
+								 newinfo->number))
+						return 0;
 					e = (struct ipt_entry *)
 						(entry0 + newpos);
-					if (!find_jump_target(newinfo, e))
-						return 0;
 				} else {
 					/* ... this is a fallthru */
 					newpos = pos + e->next_offset;
@@ -663,10 +653,12 @@ find_check_entry(struct ipt_entry *e, struct net *net, const char *name,
 	unsigned int j;
 	struct xt_mtchk_param mtpar;
 	struct xt_entry_match *ematch;
+	unsigned long pcnt;
 
-	e->counters.pcnt = xt_percpu_counter_alloc();
-	if (IS_ERR_VALUE(e->counters.pcnt))
+	pcnt = xt_percpu_counter_alloc();
+	if (IS_ERR_VALUE(pcnt))
 		return -ENOMEM;
+	e->counters.pcnt = pcnt;
 
 	j = 0;
 	mtpar.net	= net;
@@ -811,6 +803,7 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 		const struct ipt_replace *repl)
 {
 	struct ipt_entry *iter;
+	unsigned int *offsets;
 	unsigned int i;
 	int ret = 0;
 
@@ -824,6 +817,9 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 	}
 
 	duprintf("translate_table: size %u\n", newinfo->size);
+	offsets = xt_alloc_entry_offsets(newinfo->number);
+	if (!offsets)
+		return -ENOMEM;
 	i = 0;
 	/* Walk through entries, checking offsets. */
 	xt_entry_foreach(iter, entry0, newinfo->size) {
@@ -833,17 +829,20 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 						 repl->underflow,
 						 repl->valid_hooks);
 		if (ret != 0)
-			return ret;
+			goto out_free;
+		if (i < repl->num_entries)
+			offsets[i] = (void *)iter - entry0;
 		++i;
 		if (strcmp(ipt_get_target(iter)->u.user.name,
 		    XT_ERROR_TARGET) == 0)
 			++newinfo->stacksize;
 	}
 
+	ret = -EINVAL;
 	if (i != repl->num_entries) {
 		duprintf("translate_table: %u not %u entries\n",
 			 i, repl->num_entries);
-		return -EINVAL;
+		goto out_free;
 	}
 
 	/* Check hooks all assigned */
@@ -854,17 +853,20 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 		if (newinfo->hook_entry[i] == 0xFFFFFFFF) {
 			duprintf("Invalid hook entry %u %u\n",
 				 i, repl->hook_entry[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 		if (newinfo->underflow[i] == 0xFFFFFFFF) {
 			duprintf("Invalid underflow %u %u\n",
 				 i, repl->underflow[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 	}
 
-	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0))
-		return -ELOOP;
+	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0, offsets)) {
+		ret = -ELOOP;
+		goto out_free;
+	}
+	kvfree(offsets);
 
 	/* Finally, each sanity check must pass */
 	i = 0;
@@ -885,6 +887,9 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 	}
 
 	return ret;
+ out_free:
+	kvfree(offsets);
+	return ret;
 }
 
 static void
diff --git a/net/ipv4/netfilter/nf_reject_ipv4.c b/net/ipv4/netfilter/nf_reject_ipv4.c
index c747b2d9eb77..d4acf38b60fd 100644
--- a/net/ipv4/netfilter/nf_reject_ipv4.c
+++ b/net/ipv4/netfilter/nf_reject_ipv4.c
@@ -124,6 +124,8 @@ void nf_send_reset(struct net *net, struct sk_buff *oldskb, int hook)
 	/* ip_route_me_harder expects skb->dst to be set */
 	skb_dst_set_noref(nskb, skb_dst(oldskb));
 
+	nskb->mark = IP4_REPLY_MARK(net, oldskb->mark);
+
 	skb_reserve(nskb, LL_MAX_HEADER);
 	niph = nf_reject_iphdr_put(nskb, oldskb, IPPROTO_TCP,
 				   ip4_dst_hoplimit(skb_dst(nskb)));
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 79203972bfc6..aa82e0821591 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2185,6 +2185,9 @@ adjudge_to_death:
 			tcp_send_active_reset(sk, GFP_ATOMIC);
 			NET_INC_STATS_BH(sock_net(sk),
 					LINUX_MIB_TCPABORTONMEMORY);
+		} else if (!check_net(sock_net(sk))) {
+			/* Not possible to send reset; just close */
+			tcp_set_state(sk, TCP_CLOSE);
 		}
 	}
 
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index c1a84472cc0c..2221e3c36bd5 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -80,11 +80,19 @@ static void tcp_write_err(struct sock *sk)
  * to prevent DoS attacks. It is called when a retransmission timeout
  * or zero probe timeout occurs on orphaned socket.
  *
+ * Also close if our net namespace is exiting; in that case there is no
+ * hope of ever communicating again since all netns interfaces are already
+ * down (or about to be down), and we need to release our dst references,
+ * which have been moved to the netns loopback interface, so the namespace
+ * can finish exiting.  This condition is only possible if we are a kernel
+ * socket, as those do not hold references to the namespace.
+ *
  * Criteria is still not confirmed experimentally and may change.
  * We kill the socket, if:
  * 1. If number of orphaned sockets exceeds an administratively configured
  *    limit.
  * 2. If we have strong memory pressure.
+ * 3. If our net namespace is exiting.
  */
 static int tcp_out_of_resources(struct sock *sk, bool do_reset)
 {
@@ -113,6 +121,13 @@ static int tcp_out_of_resources(struct sock *sk, bool do_reset)
 		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPABORTONMEMORY);
 		return 1;
 	}
+
+	if (!check_net(sock_net(sk))) {
+		/* Not possible to send reset; just close */
+		tcp_done(sk);
+		return 1;
+	}
+
 	return 0;
 }
 
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index b809958f7388..3ef81c387923 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -148,7 +148,7 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
 
-static bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
+bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
 {
 	if (!np->autoflowlabel_set)
 		return ip6_default_np_autolabel(net);
@@ -1246,14 +1246,16 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
 	v6_cork->tclass = tclass;
 	if (rt->dst.flags & DST_XFRM_TUNNEL)
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(&rt->dst);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst);
 	else
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(rt->dst.path);
 	if (np->frag_size < mtu) {
 		if (np->frag_size)
 			mtu = np->frag_size;
 	}
+	if (mtu < IPV6_MIN_MTU)
+		return -EINVAL;
 	cork->base.fragsize = mtu;
 	if (dst_allfrag(rt->dst.path))
 		cork->base.flags |= IPCORK_ALLFRAG;
@@ -1783,6 +1785,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 	cork.base.flags = 0;
 	cork.base.addr = 0;
 	cork.base.opt = NULL;
+	cork.base.dst = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, hlimit, tclass, opt, rt, fl6);
 	if (err) {
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 435e26210587..9011176c8387 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -1313,7 +1313,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IPV6_AUTOFLOWLABEL:
-		val = np->autoflowlabel;
+		val = ip6_autoflowlabel(sock_net(sk), np);
 		break;
 
 	default:
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 6fd784643d6e..308b825fd12f 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -459,23 +459,12 @@ ip6t_do_table(struct sk_buff *skb,
 #endif
 }
 
-static bool find_jump_target(const struct xt_table_info *t,
-			     const struct ip6t_entry *target)
-{
-	struct ip6t_entry *iter;
-
-	xt_entry_foreach(iter, t->entries, t->size) {
-		 if (iter == target)
-			return true;
-	}
-	return false;
-}
-
 /* Figures out from what hook each rule can be called: returns 0 if
    there are loops.  Puts hook bitmask in comefrom. */
 static int
 mark_source_chains(const struct xt_table_info *newinfo,
-		   unsigned int valid_hooks, void *entry0)
+		   unsigned int valid_hooks, void *entry0,
+		   unsigned int *offsets)
 {
 	unsigned int hook;
 
@@ -568,10 +557,11 @@ mark_source_chains(const struct xt_table_info *newinfo,
 					/* This a jump; chase it. */
 					duprintf("Jump rule %u -> %u\n",
 						 pos, newpos);
+					if (!xt_find_jump_offset(offsets, newpos,
+								 newinfo->number))
+						return 0;
 					e = (struct ip6t_entry *)
 						(entry0 + newpos);
-					if (!find_jump_target(newinfo, e))
-						return 0;
 				} else {
 					/* ... this is a fallthru */
 					newpos = pos + e->next_offset;
@@ -680,10 +670,12 @@ find_check_entry(struct ip6t_entry *e, struct net *net, const char *name,
 	unsigned int j;
 	struct xt_mtchk_param mtpar;
 	struct xt_entry_match *ematch;
+	unsigned long pcnt;
 
-	e->counters.pcnt = xt_percpu_counter_alloc();
-	if (IS_ERR_VALUE(e->counters.pcnt))
+	pcnt = xt_percpu_counter_alloc();
+	if (IS_ERR_VALUE(pcnt))
 		return -ENOMEM;
+	e->counters.pcnt = pcnt;
 
 	j = 0;
 	mtpar.net	= net;
@@ -827,6 +819,7 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 		const struct ip6t_replace *repl)
 {
 	struct ip6t_entry *iter;
+	unsigned int *offsets;
 	unsigned int i;
 	int ret = 0;
 
@@ -840,6 +833,9 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 	}
 
 	duprintf("translate_table: size %u\n", newinfo->size);
+	offsets = xt_alloc_entry_offsets(newinfo->number);
+	if (!offsets)
+		return -ENOMEM;
 	i = 0;
 	/* Walk through entries, checking offsets. */
 	xt_entry_foreach(iter, entry0, newinfo->size) {
@@ -849,17 +845,20 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 						 repl->underflow,
 						 repl->valid_hooks);
 		if (ret != 0)
-			return ret;
+			goto out_free;
+		if (i < repl->num_entries)
+			offsets[i] = (void *)iter - entry0;
 		++i;
 		if (strcmp(ip6t_get_target(iter)->u.user.name,
 		    XT_ERROR_TARGET) == 0)
 			++newinfo->stacksize;
 	}
 
+	ret = -EINVAL;
 	if (i != repl->num_entries) {
 		duprintf("translate_table: %u not %u entries\n",
 			 i, repl->num_entries);
-		return -EINVAL;
+		goto out_free;
 	}
 
 	/* Check hooks all assigned */
@@ -870,17 +869,20 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 		if (newinfo->hook_entry[i] == 0xFFFFFFFF) {
 			duprintf("Invalid hook entry %u %u\n",
 				 i, repl->hook_entry[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 		if (newinfo->underflow[i] == 0xFFFFFFFF) {
 			duprintf("Invalid underflow %u %u\n",
 				 i, repl->underflow[i]);
-			return -EINVAL;
+			goto out_free;
 		}
 	}
 
-	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0))
-		return -ELOOP;
+	if (!mark_source_chains(newinfo, repl->valid_hooks, entry0, offsets)) {
+		ret = -ELOOP;
+		goto out_free;
+	}
+	kvfree(offsets);
 
 	/* Finally, each sanity check must pass */
 	i = 0;
@@ -901,6 +903,9 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
 	}
 
 	return ret;
+ out_free:
+	kvfree(offsets);
+	return ret;
 }
 
 static void
diff --git a/net/ipv6/netfilter/nf_dup_ipv6.c b/net/ipv6/netfilter/nf_dup_ipv6.c
index 6989c70ae29f..4a84b5ad9ecb 100644
--- a/net/ipv6/netfilter/nf_dup_ipv6.c
+++ b/net/ipv6/netfilter/nf_dup_ipv6.c
@@ -33,6 +33,7 @@ static bool nf_dup_ipv6_route(struct net *net, struct sk_buff *skb,
 	fl6.daddr = *gw;
 	fl6.flowlabel = (__force __be32)(((iph->flow_lbl[0] & 0xF) << 16) |
 			(iph->flow_lbl[1] << 8) | iph->flow_lbl[2]);
+	fl6.flowi6_flags = FLOWI_FLAG_KNOWN_NH;
 	dst = ip6_route_output(net, NULL, &fl6);
 	if (dst->error) {
 		dst_release(dst);
diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
index e0f922b777e3..7117e5bef412 100644
--- a/net/ipv6/netfilter/nf_reject_ipv6.c
+++ b/net/ipv6/netfilter/nf_reject_ipv6.c
@@ -157,6 +157,7 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
 	fl6.daddr = oip6h->saddr;
 	fl6.fl6_sport = otcph->dest;
 	fl6.fl6_dport = otcph->source;
+	fl6.flowi6_mark = IP6_REPLY_MARK(net, oldskb->mark);
 	security_skb_classify_flow(oldskb, flowi6_to_flowi(&fl6));
 	dst = ip6_route_output(net, NULL, &fl6);
 	if (dst == NULL || dst->error) {
@@ -180,6 +181,8 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
 
 	skb_dst_set(nskb, dst);
 
+	nskb->mark = fl6.flowi6_mark;
+
 	skb_reserve(nskb, hh_len + dst->header_len);
 	ip6h = nf_reject_ip6hdr_put(nskb, oldskb, IPPROTO_TCP,
 				    ip6_dst_hoplimit(dst));
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 2efe0500bba9..0610e8cfe6be 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -719,6 +719,7 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
 	 * least once for the stats anyway.
 	 */
 	rcu_read_lock_bh();
+ begin:
 	hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
 		ct = nf_ct_tuplehash_to_ctrack(h);
 		if (ct != ignored_conntrack &&
@@ -730,6 +731,12 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
 		}
 		NF_CT_STAT_INC(net, searched);
 	}
+
+	if (get_nulls_value(n) != hash) {
+		NF_CT_STAT_INC(net, search_restart);
+		goto begin;
+	}
+
 	rcu_read_unlock_bh();
 
 	return 0;
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 7f16d19d6198..a91f8bd51d05 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -560,7 +560,7 @@ static int exp_seq_show(struct seq_file *s, void *v)
 	helper = rcu_dereference(nfct_help(expect->master)->helper);
 	if (helper) {
 		seq_printf(s, "%s%s", expect->flags ? " " : "", helper->name);
-		if (helper->expect_policy[expect->class].name)
+		if (helper->expect_policy[expect->class].name[0])
 			seq_printf(s, "/%s",
 				   helper->expect_policy[expect->class].name);
 	}
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 9178e9302525..8cdecd59d9a0 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1435,9 +1435,12 @@ static int process_sip_request(struct sk_buff *skb, unsigned int protoff,
 		handler = &sip_handlers[i];
 		if (handler->request == NULL)
 			continue;
-		if (*datalen < handler->len ||
+		if (*datalen < handler->len + 2 ||
 		    strncasecmp(*dptr, handler->method, handler->len))
 			continue;
+		if ((*dptr)[handler->len] != ' ' ||
+		    !isalpha((*dptr)[handler->len+1]))
+			continue;
 
 		if (ct_sip_get_header(ct, *dptr, 0, *datalen, SIP_HDR_CSEQ,
 				      &matchoff, &matchlen) <= 0) {
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index 8d34a488efc0..ac143ae4f7b6 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/errno.h>
+#include <linux/capability.h>
 #include <net/netlink.h>
 #include <net/sock.h>
 
@@ -392,6 +393,9 @@ nfnl_cthelper_new(struct sock *nfnl, struct sk_buff *skb,
 	struct nfnl_cthelper *nlcth;
 	int ret = 0;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!tb[NFCTH_NAME] || !tb[NFCTH_TUPLE])
 		return -EINVAL;
 
@@ -595,6 +599,9 @@ nfnl_cthelper_get(struct sock *nfnl, struct sk_buff *skb,
 	struct nfnl_cthelper *nlcth;
 	bool tuple_set = false;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (nlh->nlmsg_flags & NLM_F_DUMP) {
 		struct netlink_dump_control c = {
 			.dump = nfnl_cthelper_dump_table,
@@ -661,6 +668,9 @@ nfnl_cthelper_del(struct sock *nfnl, struct sk_buff *skb,
 	struct nfnl_cthelper *nlcth, *n;
 	int j = 0, ret;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (tb[NFCTH_NAME])
 		helper_name = nla_data(tb[NFCTH_NAME]);
 
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index f6837f9b6d6c..c14d2e8eaec3 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -1053,10 +1053,8 @@ nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
 	struct net *net = sock_net(ctnl);
 	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
 
-	queue = instance_lookup(q, queue_num);
-	if (!queue)
-		queue = verdict_instance_lookup(q, queue_num,
-						NETLINK_CB(skb).portid);
+	queue = verdict_instance_lookup(q, queue_num,
+					NETLINK_CB(skb).portid);
 	if (IS_ERR(queue))
 		return PTR_ERR(queue);
 
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 2fc6ca9d1286..7b42b0ad3f9b 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -701,6 +701,56 @@ int xt_check_entry_offsets(const void *base,
 }
 EXPORT_SYMBOL(xt_check_entry_offsets);
 
+/**
+ * xt_alloc_entry_offsets - allocate array to store rule head offsets
+ *
+ * @size: number of entries
+ *
+ * Return: NULL or kmalloc'd or vmalloc'd array
+ */
+unsigned int *xt_alloc_entry_offsets(unsigned int size)
+{
+	unsigned int *off;
+
+	off = kcalloc(size, sizeof(unsigned int), GFP_KERNEL | __GFP_NOWARN);
+
+	if (off)
+		return off;
+
+	if (size < (SIZE_MAX / sizeof(unsigned int)))
+		off = vmalloc(size * sizeof(unsigned int));
+
+	return off;
+}
+EXPORT_SYMBOL(xt_alloc_entry_offsets);
+
+/**
+ * xt_find_jump_offset - check if target is a valid jump offset
+ *
+ * @offsets: array containing all valid rule start offsets of a rule blob
+ * @target: the jump target to search for
+ * @size: entries in @offset
+ */
+bool xt_find_jump_offset(const unsigned int *offsets,
+			 unsigned int target, unsigned int size)
+{
+	int m, low = 0, hi = size;
+
+	while (hi > low) {
+		m = (low + hi) / 2u;
+
+		if (offsets[m] > target)
+			hi = m;
+		else if (offsets[m] < target)
+			low = m + 1;
+		else
+			return true;
+	}
+
+	return false;
+}
+EXPORT_SYMBOL(xt_find_jump_offset);
+
 int xt_check_target(struct xt_tgchk_param *par,
 		    unsigned int size, u_int8_t proto, bool inv_proto)
 {
diff --git a/net/netfilter/xt_osf.c b/net/netfilter/xt_osf.c
index df8801e02a32..7eae0d0af89a 100644
--- a/net/netfilter/xt_osf.c
+++ b/net/netfilter/xt_osf.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 
+#include <linux/capability.h>
 #include <linux/if.h>
 #include <linux/inetdevice.h>
 #include <linux/ip.h>
@@ -69,6 +70,9 @@ static int xt_osf_add_callback(struct sock *ctnl, struct sk_buff *skb,
 	struct xt_osf_finger *kf = NULL, *sf;
 	int err = 0;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!osf_attrs[OSF_ATTR_FINGER])
 		return -EINVAL;
 
@@ -112,6 +116,9 @@ static int xt_osf_remove_callback(struct sock *ctnl, struct sk_buff *skb,
 	struct xt_osf_finger *sf;
 	int err = -ENOENT;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!osf_attrs[OSF_ATTR_FINGER])
 		return -EINVAL;
 
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a870d27ca778..e9851198a850 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -83,7 +83,7 @@
 static int sctp_writeable(struct sock *sk);
 static void sctp_wfree(struct sk_buff *skb);
 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
-				size_t msg_len, struct sock **orig_sk);
+				size_t msg_len);
 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p);
 static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p);
 static int sctp_wait_for_accept(struct sock *sk, long timeo);
@@ -332,16 +332,14 @@ static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
 	if (len < sizeof (struct sockaddr))
 		return NULL;
 
+	if (!opt->pf->af_supported(addr->sa.sa_family, opt))
+		return NULL;
+
 	/* V4 mapped address are really of AF_INET family */
 	if (addr->sa.sa_family == AF_INET6 &&
-	    ipv6_addr_v4mapped(&addr->v6.sin6_addr)) {
-		if (!opt->pf->af_supported(AF_INET, opt))
-			return NULL;
-	} else {
-		/* Does this PF support this AF? */
-		if (!opt->pf->af_supported(addr->sa.sa_family, opt))
-			return NULL;
-	}
+	    ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
+	    !opt->pf->af_supported(AF_INET, opt))
+		return NULL;
 
 	/* If we get this far, af is valid. */
 	af = sctp_get_af_specific(addr->sa.sa_family);
@@ -1954,7 +1952,7 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
 	timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 	if (!sctp_wspace(asoc)) {
 		/* sk can be changed by peel off when waiting for buf. */
-		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len, &sk);
+		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
 		if (err) {
 			if (err == -ESRCH) {
 				/* asoc is already dead. */
@@ -6976,12 +6974,12 @@ void sctp_sock_rfree(struct sk_buff *skb)
 
 /* Helper function to wait for space in the sndbuf.  */
 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
-				size_t msg_len, struct sock **orig_sk)
+				size_t msg_len)
 {
 	struct sock *sk = asoc->base.sk;
-	int err = 0;
 	long current_timeo = *timeo_p;
 	DEFINE_WAIT(wait);
+	int err = 0;
 
 	pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
 		 *timeo_p, msg_len);
@@ -7010,17 +7008,13 @@ static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
 		release_sock(sk);
 		current_timeo = schedule_timeout(current_timeo);
 		lock_sock(sk);
-		if (sk != asoc->base.sk) {
-			release_sock(sk);
-			sk = asoc->base.sk;
-			lock_sock(sk);
-		}
+		if (sk != asoc->base.sk)
+			goto do_error;
 
 		*timeo_p = current_timeo;
 	}
 
 out:
-	*orig_sk = sk;
 	finish_wait(&asoc->wait, &wait);
 
 	/* Release the association's refcnt.  */
diff --git a/tools/usb/usbip/libsrc/usbip_common.c b/tools/usb/usbip/libsrc/usbip_common.c
index ac73710473de..8000445ff884 100644
--- a/tools/usb/usbip/libsrc/usbip_common.c
+++ b/tools/usb/usbip/libsrc/usbip_common.c
@@ -215,9 +215,16 @@ int read_usb_interface(struct usbip_usb_device *udev, int i,
 		       struct usbip_usb_interface *uinf)
 {
 	char busid[SYSFS_BUS_ID_SIZE];
+	int size;
 	struct udev_device *sif;
 
-	sprintf(busid, "%s:%d.%d", udev->busid, udev->bConfigurationValue, i);
+	size = snprintf(busid, sizeof(busid), "%s:%d.%d",
+			udev->busid, udev->bConfigurationValue, i);
+	if (size < 0 || (unsigned int)size >= sizeof(busid)) {
+		err("busid length %i >= %lu or < 0", size,
+		    (unsigned long)sizeof(busid));
+		return -1;
+	}
 
 	sif = udev_device_new_from_subsystem_sysname(udev_context, "usb", busid);
 	if (!sif) {
diff --git a/tools/usb/usbip/libsrc/usbip_host_driver.c b/tools/usb/usbip/libsrc/usbip_host_driver.c
index bef08d5c44e8..071b9ce99420 100644
--- a/tools/usb/usbip/libsrc/usbip_host_driver.c
+++ b/tools/usb/usbip/libsrc/usbip_host_driver.c
@@ -39,13 +39,19 @@ struct udev *udev_context;
 static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
 {
 	char status_attr_path[SYSFS_PATH_MAX];
+	int size;
 	int fd;
 	int length;
 	char status;
 	int value = 0;
 
-	snprintf(status_attr_path, SYSFS_PATH_MAX, "%s/usbip_status",
-		 udev->path);
+	size = snprintf(status_attr_path, SYSFS_PATH_MAX, "%s/usbip_status",
+			udev->path);
+	if (size < 0 || (unsigned int)size >= sizeof(status_attr_path)) {
+		err("usbip_status path length %i >= %lu or < 0", size,
+		    (unsigned long)sizeof(status_attr_path));
+		return -1;
+	}
 
 	fd = open(status_attr_path, O_RDONLY);
 	if (fd < 0) {
@@ -225,6 +231,7 @@ int usbip_host_export_device(struct usbip_exported_device *edev, int sockfd)
 {
 	char attr_name[] = "usbip_sockfd";
 	char sockfd_attr_path[SYSFS_PATH_MAX];
+	int size;
 	char sockfd_buff[30];
 	int ret;
 
@@ -244,10 +251,20 @@ int usbip_host_export_device(struct usbip_exported_device *edev, int sockfd)
 	}
 
 	/* only the first interface is true */
-	snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
-		 edev->udev.path, attr_name);
+	size = snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
+			edev->udev.path, attr_name);
+	if (size < 0 || (unsigned int)size >= sizeof(sockfd_attr_path)) {
+		err("exported device path length %i >= %lu or < 0", size,
+		    (unsigned long)sizeof(sockfd_attr_path));
+		return -1;
+	}
 
-	snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
+	size = snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
+	if (size < 0 || (unsigned int)size >= sizeof(sockfd_buff)) {
+		err("socket length %i >= %lu or < 0", size,
+		    (unsigned long)sizeof(sockfd_buff));
+		return -1;
+	}
 
 	ret = write_sysfs_attribute(sockfd_attr_path, sockfd_buff,
 				    strlen(sockfd_buff));
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
index ad9204773533..1274f326242c 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.c
+++ b/tools/usb/usbip/libsrc/vhci_driver.c
@@ -55,12 +55,12 @@ static int parse_status(const char *value)
 
 	while (*c != '\0') {
 		int port, status, speed, devid;
-		unsigned long socket;
+		int sockfd;
 		char lbusid[SYSFS_BUS_ID_SIZE];
 
-		ret = sscanf(c, "%d %d %d %x %lx %31s\n",
+		ret = sscanf(c, "%d %d %d %x %u %31s\n",
 				&port, &status, &speed,
-				&devid, &socket, lbusid);
+				&devid, &sockfd, lbusid);
 
 		if (ret < 5) {
 			dbg("sscanf failed: %d", ret);
@@ -69,7 +69,7 @@ static int parse_status(const char *value)
 
 		dbg("port %d status %d speed %d devid %x",
 				port, status, speed, devid);
-		dbg("socket %lx lbusid %s", socket, lbusid);
+		dbg("sockfd %u lbusid %s", sockfd, lbusid);
 
 
 		/* if a device is connected, look at it */
diff --git a/tools/usb/usbip/src/usbip.c b/tools/usb/usbip/src/usbip.c
index d7599d943529..73d8eee8130b 100644
--- a/tools/usb/usbip/src/usbip.c
+++ b/tools/usb/usbip/src/usbip.c
@@ -176,6 +176,8 @@ int main(int argc, char *argv[])
 			break;
 		case '?':
 			printf("usbip: invalid option\n");
+			/* Terminate after printing error */
+			/* FALLTHRU */
 		default:
 			usbip_usage();
 			goto out;