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2013-09-12memcg: rename RESOURCE_MAX to RES_COUNTER_MAXSha Zhengju
RESOURCE_MAX is far too general name, change it to RES_COUNTER_MAX. Signed-off-by: Sha Zhengju <handai.szj@taobao.com> Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Jeff Liu <jeff.liu@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11Merge branch 'akpm' (patches from Andrew Morton)Linus Torvalds
Merge first patch-bomb from Andrew Morton: - Some pidns/fork/exec tweaks - OCFS2 updates - Most of MM - there remain quite a few memcg parts which depend on pending core cgroups changes. Which might have been already merged - I'll check tomorrow... - Various misc stuff all over the place - A few block bits which I never got around to sending to Jens - relatively minor things. - MAINTAINERS maintenance - A small number of lib/ updates - checkpatch updates - epoll - firmware/dmi-scan - Some kprobes work for S390 - drivers/rtc updates - hfsplus feature work - vmcore feature work - rbtree upgrades - AOE updates - pktcdvd cleanups - PPS - memstick - w1 - New "inittmpfs" feature, which does the obvious - More IPC work from Davidlohr. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (303 commits) lz4: fix compression/decompression signedness mismatch ipc: drop ipc_lock_check ipc, shm: drop shm_lock_check ipc: drop ipc_lock_by_ptr ipc, shm: guard against non-existant vma in shmdt(2) ipc: document general ipc locking scheme ipc,msg: drop msg_unlock ipc: rename ids->rw_mutex ipc,shm: shorten critical region for shmat ipc,shm: cleanup do_shmat pasta ipc,shm: shorten critical region for shmctl ipc,shm: make shmctl_nolock lockless ipc,shm: introduce shmctl_nolock ipc: drop ipcctl_pre_down ipc,shm: shorten critical region in shmctl_down ipc,shm: introduce lockless functions to obtain the ipc object initmpfs: use initramfs if rootfstype= or root= specified initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled initmpfs: move rootfs code from fs/ramfs/ to init/ initmpfs: move bdi setup from init_rootfs to init_ramfs ...
2013-09-11kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user()Mathieu Desnoyers
I found the following pattern that leads in to interesting findings: grep -r "ret.*|=.*__put_user" * grep -r "ret.*|=.*__get_user" * grep -r "ret.*|=.*__copy" * The __put_user() calls in compat_ioctl.c, ptrace compat, signal compat, since those appear in compat code, we could probably expect the kernel addresses not to be reachable in the lower 32-bit range, so I think they might not be exploitable. For the "__get_user" cases, I don't think those are exploitable: the worse that can happen is that the kernel will copy kernel memory into in-kernel buffers, and will fail immediately afterward. The alpha csum_partial_copy_from_user() seems to be missing the access_ok() check entirely. The fix is inspired from x86. This could lead to information leak on alpha. I also noticed that many architectures map csum_partial_copy_from_user() to csum_partial_copy_generic(), but I wonder if the latter is performing the access checks on every architectures. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Brown paper bag fix in HTB scheduler, class options set incorrectly due to a typoe. Fix from Vimalkumar. 2) It's possible for the ipv6 FIB garbage collector to run before all the necessary datastructure are setup during init, defer the notifier registry to avoid this problem. Fix from Michal Kubecek. 3) New i40e ethernet driver from the Intel folks. 4) Add new qmi wwan device IDs, from Bjørn Mork. 5) Doorbell lock in bnx2x driver is not initialized properly in some configurations, fix from Ariel Elior. 6) Revert an ipv6 packet option padding change that broke standardized ipv6 implementation test suites. From Jiri Pirko. 7) Fix synchronization of ARP information in bonding layer, from Nikolay Aleksandrov. 8) Fix missing error return resulting in illegal memory accesses in openvswitch, from Daniel Borkmann. 9) SCTP doesn't signal poll events properly due to mistaken operator precedence, fix also from Daniel Borkmann. 10) __netdev_pick_tx() passes wrong index to sk_tx_queue_set() which essentially disables caching of TX queue in sockets :-/ Fix from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits) net_sched: htb: fix a typo in htb_change_class() net: qmi_wwan: add new Qualcomm devices ipv6: don't call fib6_run_gc() until routing is ready net: tilegx driver: avoid compiler warning fib6_rules: fix indentation irda: vlsi_ir: Remove casting the return value which is a void pointer irda: donauboe: Remove casting the return value which is a void pointer net: fix multiqueue selection net: sctp: fix smatch warning in sctp_send_asconf_del_ip net: sctp: fix bug in sctp_poll for SOCK_SELECT_ERR_QUEUE net: fib: fib6_add: fix potential NULL pointer dereference net: ovs: flow: fix potential illegal memory access in __parse_flow_nlattrs bcm63xx_enet: remove deprecated IRQF_DISABLED net: korina: remove deprecated IRQF_DISABLED macvlan: Move skb_clone check closer to call qlcnic: Fix warning reported by kbuild test robot. bonding: fix bond_arp_rcv setting and arp validate desync state bonding: fix store_arp_validate race with mode change ipv6/exthdrs: accept tlv which includes only padding bnx2x: avoid atomic allocations during initialization ...
2013-09-11net_sched: htb: fix a typo in htb_change_class()Vimalkumar
Fix a typo added in commit 56b765b79 ("htb: improved accuracy at high rates") cbuffer should not be a copy of buffer. Signed-off-by: Vimalkumar <j.vimal@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Jiri Pirko <jpirko@redhat.com> Reviewed-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11ipv6: don't call fib6_run_gc() until routing is readyMichal Kubeček
When loading the ipv6 module, ndisc_init() is called before ip6_route_init(). As the former registers a handler calling fib6_run_gc(), this opens a window to run the garbage collector before necessary data structures are initialized. If a network device is initialized in this window, adding MAC address to it triggers a NETDEV_CHANGEADDR event, leading to a crash in fib6_clean_all(). Take the event handler registration out of ndisc_init() into a separate function ndisc_late_init() and move it after ip6_route_init(). Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11fib6_rules: fix indentationStefan Tomanek
This change just removes two tabs from the source file. Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11net: fix multiqueue selectionEric Dumazet
commit 416186fbf8c5b4e4465 ("net: Split core bits of netdev_pick_tx into __netdev_pick_tx") added a bug that disables caching of queue index in the socket. This is the source of packet reorders for TCP flows, and again this is happening more often when using FQ pacing. Old code was doing if (queue_index != old_index) sk_tx_queue_set(sk, queue_index); Alexander renamed the variables but forgot to change sk_tx_queue_set() 2nd parameter. if (queue_index != new_index) sk_tx_queue_set(sk, queue_index); This means we store -1 over and over in sk->sk_tx_queue_mapping Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11net: sctp: fix smatch warning in sctp_send_asconf_del_ipDaniel Borkmann
This was originally reported in [1] and posted by Neil Horman [2], he said: Fix up a missed null pointer check in the asconf code. If we don't find a local address, but we pass in an address length of more than 1, we may dereference a NULL laddr pointer. Currently this can't happen, as the only users of the function pass in the value 1 as the addrcnt parameter, but its not hot path, and it doesn't hurt to check for NULL should that ever be the case. The callpath from sctp_asconf_mgmt() looks okay. But this could be triggered from sctp_setsockopt_bindx() call with SCTP_BINDX_REM_ADDR and addrcnt > 1 while passing all possible addresses from the bind list to SCTP_BINDX_REM_ADDR so that we do *not* find a single address in the association's bind address list that is not in the packed array of addresses. If this happens when we have an established association with ASCONF-capable peers, then we could get a NULL pointer dereference as we only check for laddr == NULL && addrcnt == 1 and call later sctp_make_asconf_update_ip() with NULL laddr. BUT: this actually won't happen as sctp_bindx_rem() will catch such a case and return with an error earlier. As this is incredably unintuitive and error prone, add a check to catch at least future bugs here. As Neil says, its not hot path. Introduced by 8a07eb0a5 ("sctp: Add ASCONF operation on the single-homed host"). [1] http://www.spinics.net/lists/linux-sctp/msg02132.html [2] http://www.spinics.net/lists/linux-sctp/msg02133.html Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Michio Honda <micchie@sfc.wide.ad.jp> Acked-By: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11net: sctp: fix bug in sctp_poll for SOCK_SELECT_ERR_QUEUEDaniel Borkmann
If we do not add braces around ... mask |= POLLERR | sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0; ... then this condition always evaluates to true as POLLERR is defined as 8 and binary or'd with whatever result comes out of sock_flag(). Hence instead of (X | Y) ? A : B, transform it into X | (Y ? A : B). Unfortunatelty, commit 8facd5fb73 ("net: fix smatch warnings inside datagram_poll") forgot about SCTP. :-( Introduced by 7d4c04fc170 ("net: add option to enable error queue packets waking select"). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Jacob Keller <jacob.e.keller@intel.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11net: fib: fib6_add: fix potential NULL pointer dereferenceDaniel Borkmann
When the kernel is compiled with CONFIG_IPV6_SUBTREES, and we return with an error in fn = fib6_add_1(), then error codes are encoded into the return pointer e.g. ERR_PTR(-ENOENT). In such an error case, we write the error code into err and jump to out, hence enter the if(err) condition. Now, if CONFIG_IPV6_SUBTREES is enabled, we check for: if (pn != fn && pn->leaf == rt) ... if (pn != fn && !pn->leaf && !(pn->fn_flags & RTN_RTINFO)) ... Since pn is NULL and fn is f.e. ERR_PTR(-ENOENT), then pn != fn evaluates to true and causes a NULL-pointer dereference on further checks on pn. Fix it, by setting both NULL in error case, so that pn != fn already evaluates to false and no further dereference takes place. This was first correctly implemented in 4a287eba2 ("IPv6 routing, NLM_F_* flag support: REPLACE and EXCL flags support, warn about missing CREATE flag"), but the bug got later on introduced by 188c517a0 ("ipv6: return errno pointers consistently for fib6_add_1()"). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Lin Ming <mlin@ss.pku.edu.cn> Cc: Matti Vaittinen <matti.vaittinen@nsn.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Matti Vaittinen <matti.vaittinen@nsn.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11net: ovs: flow: fix potential illegal memory access in __parse_flow_nlattrsDaniel Borkmann
In function __parse_flow_nlattrs(), we check for condition (type > OVS_KEY_ATTR_MAX) and if true, print an error, but we do not return from this function as in other checks. It seems this has been forgotten, as otherwise, we could access beyond the memory of ovs_key_lens, which is of ovs_key_lens[OVS_KEY_ATTR_MAX + 1]. Hence, a maliciously prepared nla_type from user space could access beyond this upper limit. Introduced by 03f0d916a ("openvswitch: Mega flow implementation"). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Andy Zhou <azhou@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11ipv6/exthdrs: accept tlv which includes only paddingJiri Pirko
In rfc4942 and rfc2460 I cannot find anything which would implicate to drop packets which have only padding in tlv. Current behaviour breaks TAHI Test v6LC.1.2.6. Problem was intruduced in: 9b905fe6843 "ipv6/exthdrs: strict Pad1 and PadN check" Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-11Merge tag 'for-linus-3.12-merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs Pull 9p updates from Eric Van Hensbergen: "Minor 9p fixes and tweaks for 3.12 merge window The first fixes namespace issues which causes a kernel NULL pointer dereference, the second fixes uevent handling to work better with udev, and the third switches some code to use srlcpy instead of strncpy in order to be safer. All changes have been baking in for-next for at least 2 weeks" * tag 'for-linus-3.12-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: fs/9p: avoid accessing utsname after namespace has been torn down 9p: send uevent after adding/removing mount_tag attribute fs: 9p: use strlcpy instead of strncpy
2013-09-10Merge branch 'nfsd-next' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd updates from Bruce Fields: "This was a very quiet cycle! Just a few bugfixes and some cleanup" * 'nfsd-next' of git://linux-nfs.org/~bfields/linux: rpc: let xdr layer allocate gssproxy receieve pages rpc: fix huge kmalloc's in gss-proxy rpc: comment on linux_cred encoding, treat all as unsigned rpc: clean up decoding of gssproxy linux creds svcrpc: remove unused rq_resused nfsd4: nfsd4_create_clid_dir prints uninitialized data nfsd4: fix leak of inode reference on delegation failure Revert "nfsd: nfs4_file_get_access: need to be more careful with O_RDWR" sunrpc: prepare NFS for 2038 nfsd4: fix setlease error return nfsd: nfs4_file_get_access: need to be more careful with O_RDWR
2013-09-09Merge tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client updates from Trond Myklebust: "Highlights include: - Fix NFSv4 recovery so that it doesn't recover lost locks in cases such as lease loss due to a network partition, where doing so may result in data corruption. Add a kernel parameter to control choice of legacy behaviour or not. - Performance improvements when 2 processes are writing to the same file. - Flush data to disk when an RPCSEC_GSS session timeout is imminent. - Implement NFSv4.1 SP4_MACH_CRED state protection to prevent other NFS clients from being able to manipulate our lease and file locking state. - Allow sharing of RPCSEC_GSS caches between different rpc clients. - Fix the broken NFSv4 security auto-negotiation between client and server. - Fix rmdir() to wait for outstanding sillyrename unlinks to complete - Add a tracepoint framework for debugging NFSv4 state recovery issues. - Add tracing to the generic NFS layer. - Add tracing for the SUNRPC socket connection state. - Clean up the rpc_pipefs mount/umount event management. - Merge more patches from Chuck in preparation for NFSv4 migration support" * tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (107 commits) NFSv4: use mach cred for SECINFO_NO_NAME w/ integrity NFS: nfs_compare_super shouldn't check the auth flavour unless 'sec=' was set NFSv4: Allow security autonegotiation for submounts NFSv4: Disallow security negotiation for lookups when 'sec=' is specified NFSv4: Fix security auto-negotiation NFS: Clean up nfs_parse_security_flavors() NFS: Clean up the auth flavour array mess NFSv4.1 Use MDS auth flavor for data server connection NFS: Don't check lock owner compatability unless file is locked (part 2) NFS: Don't check lock owner compatibility in writes unless file is locked nfs4: Map NFS4ERR_WRONG_CRED to EPERM nfs4.1: Add SP4_MACH_CRED write and commit support nfs4.1: Add SP4_MACH_CRED stateid support nfs4.1: Add SP4_MACH_CRED secinfo support nfs4.1: Add SP4_MACH_CRED cleanup support nfs4.1: Add state protection handler nfs4.1: Minimal SP4_MACH_CRED implementation SUNRPC: Replace pointer values with task->tk_pid and rpc_clnt->cl_clid SUNRPC: Add an identifier for struct rpc_clnt SUNRPC: Ensure rpc_task->tk_pid is available for tracepoints ...
2013-09-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull ceph updates from Sage Weil: "This includes both the first pile of Ceph patches (which I sent to torvalds@vger, sigh) and a few new patches that add support for fscache for Ceph. That includes a few fscache core fixes that David Howells asked go through the Ceph tree. (Thanks go to Milosz Tanski for putting this feature together) This first batch of patches (included here) had (has) several important RBD bug fixes, hole punch support, several different cleanups in the page cache interactions, improvements in the truncate code (new truncate mutex to avoid shenanigans with i_mutex), and a series of fixes in the synchronous striping read/write code. On top of that is a random collection of small fixes all across the tree (error code checks and error path cleanup, obsolete wq flags, etc)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (43 commits) ceph: use d_invalidate() to invalidate aliases ceph: remove ceph_lookup_inode() ceph: trivial buildbot warnings fix ceph: Do not do invalidate if the filesystem is mounted nofsc ceph: page still marked private_2 ceph: ceph_readpage_to_fscache didn't check if marked ceph: clean PgPrivate2 on returning from readpages ceph: use fscache as a local presisent cache fscache: Netfs function for cleanup post readpages FS-Cache: Fix heading in documentation CacheFiles: Implement interface to check cache consistency FS-Cache: Add interface to check consistency of a cached object rbd: fix null dereference in dout rbd: fix buffer size for writes to images with snapshots libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc rbd: fix I/O error propagation for reads ceph: use vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem ceph: allow sync_read/write return partial successed size of read/write. ceph: fix bugs about handling short-read for sync read mode. ceph: remove useless variable revoked_rdcache ...
2013-09-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull namespace changes from Eric Biederman: "This is an assorted mishmash of small cleanups, enhancements and bug fixes. The major theme is user namespace mount restrictions. nsown_capable is killed as it encourages not thinking about details that need to be considered. A very hard to hit pid namespace exiting bug was finally tracked and fixed. A couple of cleanups to the basic namespace infrastructure. Finally there is an enhancement that makes per user namespace capabilities usable as capabilities, and an enhancement that allows the per userns root to nice other processes in the user namespace" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: userns: Kill nsown_capable it makes the wrong thing easy capabilities: allow nice if we are privileged pidns: Don't have unshare(CLONE_NEWPID) imply CLONE_THREAD userns: Allow PR_CAPBSET_DROP in a user namespace. namespaces: Simplify copy_namespaces so it is clear what is going on. pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup sysfs: Restrict mounting sysfs userns: Better restrictions on when proc and sysfs can be mounted vfs: Don't copy mount bind mounts of /proc/<pid>/ns/mnt between namespaces kernel/nsproxy.c: Improving a snippet of code. proc: Restrict mounting the proc filesystem vfs: Lock in place mounts from more privileged users
2013-09-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: "A quick set of fixes, some to deal with fallout from yesterday's net-next merge. 1) Fix compilation of bnx2x driver with CONFIG_BNX2X_SRIOV disabled, from Dmitry Kravkov. 2) Fix a bnx2x regression caused by one of Dave Jones's mistaken braces changes, from Eilon Greenstein. 3) Add some protective filtering in the netlink tap code, from Daniel Borkmann. 4) Fix TCP congestion window growth regression after timeouts, from Yuchung Cheng. 5) Correctly adjust TCP's rcv_ssthresh for out of order packets, from Eric Dumazet" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: tcp: properly increase rcv_ssthresh for ofo packets net: add documentation for BQL helpers mlx5: remove unused MLX5_DEBUG param in Kconfig bnx2x: Restore a call to config_init bnx2x: fix broken compilation with CONFIG_BNX2X_SRIOV is not set tcp: fix no cwnd growth after timeout net: netlink: filter particular protocols from analyzers
2013-09-06tcp: properly increase rcv_ssthresh for ofo packetsEric Dumazet
TCP receive window handling is multi staged. A socket has a memory budget, static or dynamic, in sk_rcvbuf. Because we do not really know how this memory budget translates to a TCP window (payload), TCP announces a small initial window (about 20 MSS). When a packet is received, we increase TCP rcv_win depending on the payload/truesize ratio of this packet. Good citizen packets give a hint that it's reasonable to have rcv_win = sk_rcvbuf/2 This heuristic takes place in tcp_grow_window() Problem is : We currently call tcp_grow_window() only for in-order packets. This means that reorders or packet losses stop proper grow of rcv_win, and senders are unable to benefit from fast recovery, or proper reordering level detection. Really, a packet being stored in OFO queue is not a bad citizen. It should be part of the game as in-order packets. In our traces, we very often see sender is limited by linux small receive windows, even if linux hosts use autotuning (DRS) and should allow rcv_win to grow to ~3MB. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-06tcp: fix no cwnd growth after timeoutYuchung Cheng
In commit 0f7cc9a3 "tcp: increase throughput when reordering is high", it only allows cwnd to increase in Open state. This mistakenly disables slow start after timeout (CA_Loss). Moreover cwnd won't grow if the state moves from Disorder to Open later in tcp_fastretrans_alert(). Therefore the correct logic should be to allow cwnd to grow as long as the data is received in order in Open, Loss, or even Disorder state. Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-06net: netlink: filter particular protocols from analyzersDaniel Borkmann
Fix finer-grained control and let only a whitelist of allowed netlink protocols pass, in our case related to networking. If later on, other subsystems decide they want to add their protocol as well to the list of allowed protocols they shall simply add it. While at it, we also need to tell what protocol is in use otherwise BPF_S_ANC_PROTOCOL can not pick it up (as it's not filled out). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-06Merge tag 'fscache-fixes-for-ceph' into wip-fscacheMilosz Tanski
Patches for Ceph FS-Cache support
2013-09-06Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree from Jiri Kosina: "The usual trivial updates all over the tree -- mostly typo fixes and documentation updates" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (52 commits) doc: Documentation/cputopology.txt fix typo treewide: Convert retrun typos to return Fix comment typo for init_cma_reserved_pageblock Documentation/trace: Correcting and extending tracepoint documentation mm/hotplug: fix a typo in Documentation/memory-hotplug.txt power: Documentation: Update s2ram link doc: fix a typo in Documentation/00-INDEX Documentation/printk-formats.txt: No casts needed for u64/s64 doc: Fix typo "is is" in Documentations treewide: Fix printks with 0x%# zram: doc fixes Documentation/kmemcheck: update kmemcheck documentation doc: documentation/hwspinlock.txt fix typo PM / Hibernate: add section for resume options doc: filesystems : Fix typo in Documentations/filesystems scsi/megaraid fixed several typos in comments ppc: init_32: Fix error typo "CONFIG_START_KERNEL" treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks page_isolation: Fix a comment typo in test_pages_isolated() doc: fix a typo about irq affinity ...
2013-09-06Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid Pull HID updates from Jiri Kosina: "Highlights: - conversion of HID subsystem to use devm-based resource management, from Benjamin Tissoires - i2c-hid support for DT bindings, from Benjamin Tissoires - much improved support for Win8-multitouch devices, from Benjamin Tissoires - cleanup of core code using common hidinput_input_event(), from David Herrmann - fix for bug in implement() access to the bit stream (causing oops) that has been present in the code for ages, but devices that are able to trigger it have started to appear only now, from Jiri Kosina - fixes for CVE-2013-2899, CVE-2013-2898, CVE-2013-2896, CVE-2013-2892, CVE-2013-2888 (all triggerable only by specially crafted malicious HW devices plugged into the system), from Kees Cook - hidraw oops fix, from Manoj Chourasia - various smaller fixes here and there, support for a bunch of new devices by various contributors" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (53 commits) HID: MAINTAINERS: add roccat drivers HID: hid-sensor-hub: change kmalloc + memcpy by kmemdup HID: hid-sensor-hub: move to devm_kzalloc HID: hid-sensor-hub: fix indentation accross the code HID: move HID_REPORT_TYPES closer to the report-definitions HID: check for NULL field when setting values HID: picolcd_core: validate output report details HID: sensor-hub: validate feature report details HID: ntrig: validate feature report details HID: pantherlord: validate output report details HID: hid-wiimote: print small buffers via %*phC HID: uhid: improve uhid example client HID: Correct the USB IDs for the new Macbook Air 6 HID: wiimote: add support for Guitar-Hero guitars HID: wiimote: add support for Guitar-Hero drums Input: introduce BTN/ABS bits for drums and guitars HID: battery: don't do DMA from stack HID: roccat: add support for KonePureOptical v2 HID: picolcd: Prevent NULL pointer dereference on _remove() HID: usbhid: quirk for N-Trig DuoSense Touch Screen ...
2013-09-06rpc: let xdr layer allocate gssproxy receieve pagesJ. Bruce Fields
In theory the linux cred in a gssproxy reply can include up to NGROUPS_MAX data, 256K of data. In the common case we expect it to be shorter. So do as the nfsv3 ACL code does and let the xdr code allocate the pages as they come in, instead of allocating a lot of pages that won't typically be used. Tested-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-09-06rpc: fix huge kmalloc's in gss-proxyJ. Bruce Fields
The reply to a gssproxy can include up to NGROUPS_MAX gid's, which will take up more than a page. We therefore need to allocate an array of pages to hold the reply instead of trying to allocate a single huge buffer. Tested-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-09-06rpc: comment on linux_cred encoding, treat all as unsignedJ. Bruce Fields
The encoding of linux creds is a bit confusing. Also: I think in practice it doesn't really matter whether we treat any of these things as signed or unsigned, but unsigned seems more straightforward: uid_t/gid_t are unsigned and it simplifies the ngroups overflow check. Tested-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-09-06rpc: clean up decoding of gssproxy linux credsJ. Bruce Fields
We can use the normal coding infrastructure here. Two minor behavior changes: - we're assuming no wasted space at the end of the linux cred. That seems to match gss-proxy's behavior, and I can't see why it would need to do differently in the future. - NGROUPS_MAX check added: note groups_alloc doesn't do this, this is the caller's responsibility. Tested-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-09-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking changes from David Miller: "Noteworthy changes this time around: 1) Multicast rejoin support for team driver, from Jiri Pirko. 2) Centralize and simplify TCP RTT measurement handling in order to reduce the impact of bad RTO seeding from SYN/ACKs. Also, when both timestamps and local RTT measurements are available prefer the later because there are broken middleware devices which scramble the timestamp. From Yuchung Cheng. 3) Add TCP_NOTSENT_LOWAT socket option to limit the amount of kernel memory consumed to queue up unsend user data. From Eric Dumazet. 4) Add a "physical port ID" abstraction for network devices, from Jiri Pirko. 5) Add a "suppress" operation to influence fib_rules lookups, from Stefan Tomanek. 6) Add a networking development FAQ, from Paul Gortmaker. 7) Extend the information provided by tcp_probe and add ipv6 support, from Daniel Borkmann. 8) Use RCU locking more extensively in openvswitch data paths, from Pravin B Shelar. 9) Add SCTP support to openvswitch, from Joe Stringer. 10) Add EF10 chip support to SFC driver, from Ben Hutchings. 11) Add new SYNPROXY netfilter target, from Patrick McHardy. 12) Compute a rate approximation for sending in TCP sockets, and use this to more intelligently coalesce TSO frames. Furthermore, add a new packet scheduler which takes advantage of this estimate when available. From Eric Dumazet. 13) Allow AF_PACKET fanouts with random selection, from Daniel Borkmann. 14) Add ipv6 support to vxlan driver, from Cong Wang" Resolved conflicts as per discussion. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1218 commits) openvswitch: Fix alignment of struct sw_flow_key. netfilter: Fix build errors with xt_socket.c tcp: Add missing braces to do_tcp_setsockopt caif: Add missing braces to multiline if in cfctrl_linkup_request bnx2x: Add missing braces in bnx2x:bnx2x_link_initialize vxlan: Fix kernel panic on device delete. net: mvneta: implement ->ndo_do_ioctl() to support PHY ioctls net: mvneta: properly disable HW PHY polling and ensure adjust_link() works icplus: Use netif_running to determine device state ethernet/arc/arc_emac: Fix huge delays in large file copies tuntap: orphan frags before trying to set tx timestamp tuntap: purge socket error queue on detach qlcnic: use standard NAPI weights ipv6:introduce function to find route for redirect bnx2x: VF RSS support - VF side bnx2x: VF RSS support - PF side vxlan: Notify drivers for listening UDP port changes net: usbnet: update addr_assign_type if appropriate driver/net: enic: update enic maintainers and driver driver/net: enic: Exposing symbols for Cisco's low latency driver ...
2013-09-05openvswitch: Fix alignment of struct sw_flow_key.Jesse Gross
sw_flow_key alignment was declared as " __aligned(__alignof__(long))". However, this breaks on the m68k architecture where long is 32 bit in size but 16 bit aligned by default. This aligns to the size of a long to ensure that we can always do comparsions in full long-sized chunks. It also adds an additional build check to catch any reduction in alignment. CC: Andy Zhou <azhou@nicira.com> Reported-by: Fengguang Wu <fengguang.wu@intel.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Jesse Gross <jesse@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c net/bridge/br_multicast.c net/ipv6/sit.c The conflicts were minor: 1) sit.c changes overlap with change to ip_tunnel_xmit() signature. 2) br_multicast.c had an overlap between computing max_delay using msecs_to_jiffies and turning MLDV2_MRC() into an inline function with a name using lowercase instead of uppercase letters. 3) stmmac had two overlapping changes, one which conditionally allocated and hooked up a dma_cfg based upon the presence of the pbl OF property, and another one handling store-and-forward DMA made. The latter of which should not go into the new of_find_property() basic block. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05netfilter: Fix build errors with xt_socket.cDavid S. Miller
As reported by Randy Dunlap: ==================== when CONFIG_IPV6=m and CONFIG_NETFILTER_XT_MATCH_SOCKET=y: net/built-in.o: In function `socket_mt6_v1_v2': xt_socket.c:(.text+0x51b55): undefined reference to `udp6_lib_lookup' net/built-in.o: In function `socket_mt_init': xt_socket.c:(.init.text+0x1ef8): undefined reference to `nf_defrag_ipv6_enable' ==================== Like several other modules under net/netfilter/ we have to have a dependency "IPV6 disabled or set compatibly with this module" clause. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05tcp: Add missing braces to do_tcp_setsockoptDave Jones
Signed-off-by: Dave Jones <davej@fedoraproject.org> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05caif: Add missing braces to multiline if in cfctrl_linkup_requestDave Jones
The indentation here implies this was meant to be a multi-line if. Introduced several years back in commit c85c2951d4da1236e32f1858db418221e624aba5 ("caif: Handle dev_queue_xmit errors.") Signed-off-by: Dave Jones <davej@fedoraproject.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05ipv6:introduce function to find route for redirectDuan Jiong
RFC 4861 says that the IP source address of the Redirect is the same as the current first-hop router for the specified ICMP Destination Address, so the gateway should be taken into consideration when we find the route for redirect. There was once a check in commit a6279458c534d01ccc39498aba61c93083ee0372 ("NDISC: Search over all possible rules on receipt of redirect.") and the check went away in commit b94f1c0904da9b8bf031667afc48080ba7c3e8c9 ("ipv6: Use icmpv6_notify() to propagate redirect, instead of rt6_redirect()"). The bug is only "exploitable" on layer-2 because the source address of the redirect is checked to be a valid link-local address but it makes spoofing a lot easier in the same L2 domain nonetheless. Thanks very much for Hannes's help. Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05bridge: apply multicast snooping to IPv6 link-local, tooLinus Lüssing
The multicast snooping code should have matured enough to be safely applicable to IPv6 link-local multicast addresses (excluding the link-local all nodes address, ff02::1), too. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05bridge: prevent flooding IPv6 packets that do not have a listenerLinus Lüssing
Currently if there is no listener for a certain group then IPv6 packets for that group are flooded on all ports, even though there might be no host and router interested in it on a port. With this commit they are only forwarded to ports with a multicast router. Just like commit bd4265fe36 ("bridge: Only flood unregistered groups to routers") did for IPv4, let's do the same for IPv6 with the same reasoning. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-05SUNRPC: Add an identifier for struct rpc_clntTrond Myklebust
Add an identifier in order to aid debugging. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-09-04Merge tag 'PTR_RET-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull PTR_RET() removal patches from Rusty Russell: "PTR_RET() is a weird name, and led to some confusing usage. We ended up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages. This has been sitting in linux-next for a whole cycle" [ There are still some PTR_RET users scattered about, with some of them possibly being new, but most of them existing in Rusty's tree too. We have that #define PTR_RET(p) PTR_ERR_OR_ZERO(p) thing in <linux/err.h>, so they continue to work for now - Linus ] * tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: GFS2: Replace PTR_RET with PTR_ERR_OR_ZERO Btrfs: volume: Replace PTR_RET with PTR_ERR_OR_ZERO drm/cma: Replace PTR_RET with PTR_ERR_OR_ZERO sh_veu: Replace PTR_RET with PTR_ERR_OR_ZERO dma-buf: Replace PTR_RET with PTR_ERR_OR_ZERO drivers/rtc: Replace PTR_RET with PTR_ERR_OR_ZERO mm/oom_kill: remove weird use of ERR_PTR()/PTR_ERR(). staging/zcache: don't use PTR_RET(). remoteproc: don't use PTR_RET(). pinctrl: don't use PTR_RET(). acpi: Replace weird use of PTR_RET. s390: Replace weird use of PTR_RET. PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. PTR_RET is now PTR_ERR_OR_ZERO
2013-09-04net: ipv6: mld: introduce mld_{gq, ifc, dad}_stop_timer functionsDaniel Borkmann
We already have mld_{gq,ifc,dad}_start_timer() functions, so introduce mld_{gq,ifc,dad}_stop_timer() functions to reduce code size and make it more readable. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: refactor query processing into v1/v2 functionsDaniel Borkmann
Make igmp6_event_query() a bit easier to read by refactoring code parts into mld_process_v1() and mld_process_v2(). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: similarly to MLDv2 have min max_delay of 1Daniel Borkmann
Similarly as we do in MLDv2 queries, set a forged MLDv1 query with 0 ms mld_maxdelay to minimum timer shot time of 1 jiffies. This is eventually done in igmp6_group_queried() anyway, so we can simplify a check there. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: implement RFC3810 MLDv2 mode onlyDaniel Borkmann
RFC3810, 10. Security Considerations says under subsection 10.1. Query Message: A forged Version 1 Query message will put MLDv2 listeners on that link in MLDv1 Host Compatibility Mode. This scenario can be avoided by providing MLDv2 hosts with a configuration option to ignore Version 1 messages completely. Hence, implement a MLDv2-only mode that will ignore MLDv1 traffic: echo 2 > /proc/sys/net/ipv6/conf/ethX/force_mld_version or echo 2 > /proc/sys/net/ipv6/conf/all/force_mld_version Note that <all> device has a higher precedence as it was previously also the case in the macro MLD_V1_SEEN() that would "short-circuit" if condition on <all> case. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: get rid of MLDV2_MRC and simplify calculationDaniel Borkmann
Get rid of MLDV2_MRC and use our new macros for mantisse and exponent to calculate Maximum Response Delay out of the Maximum Response Code. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: clean up MLD_V1_SEEN macroDaniel Borkmann
Replace the macro with a function to make it more readable. GCC will eventually decide whether to inline this or not (also, that's not fast-path anyway). Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04net: ipv6: mld: fix v1/v2 switchback timeout to rfc3810, 9.12.Daniel Borkmann
i) RFC3810, 9.2. Query Interval [QI] says: The Query Interval variable denotes the interval between General Queries sent by the Querier. Default value: 125 seconds. [...] ii) RFC3810, 9.3. Query Response Interval [QRI] says: The Maximum Response Delay used to calculate the Maximum Response Code inserted into the periodic General Queries. Default value: 10000 (10 seconds) [...] The number of seconds represented by the [Query Response Interval] must be less than the [Query Interval]. iii) RFC3810, 9.12. Older Version Querier Present Timeout [OVQPT] says: The Older Version Querier Present Timeout is the time-out for transitioning a host back to MLDv2 Host Compatibility Mode. When an MLDv1 query is received, MLDv2 hosts set their Older Version Querier Present Timer to [Older Version Querier Present Timeout]. This value MUST be ([Robustness Variable] times (the [Query Interval] in the last Query received)) plus ([Query Response Interval]). Hence, on *default* the timeout results in: [RV] = 2, [QI] = 125sec, [QRI] = 10sec [OVQPT] = [RV] * [QI] + [QRI] = 260sec Having that said, we currently calculate [OVQPT] (here given as 'switchback' variable) as ... switchback = (idev->mc_qrv + 1) * max_delay RFC3810, 9.12. says "the [Query Interval] in the last Query received". In section "9.14. Configuring timers", it is said: This section is meant to provide advice to network administrators on how to tune these settings to their network. Ambitious router implementations might tune these settings dynamically based upon changing characteristics of the network. [...] iv) RFC38010, 9.14.2. Query Interval: The overall level of periodic MLD traffic is inversely proportional to the Query Interval. A longer Query Interval results in a lower overall level of MLD traffic. The value of the Query Interval MUST be equal to or greater than the Maximum Response Delay used to calculate the Maximum Response Code inserted in General Query messages. I assume that was why switchback is calculated as is (3 * max_delay), although this setting seems to be meant for routers only to configure their [QI] interval for non-default intervals. So usage here like this is clearly wrong. Concluding, the current behaviour in IPv6's multicast code is not conform to the RFC as switch back is calculated wrongly. That is, it has a too small value, so MLDv2 hosts switch back again to MLDv2 way too early, i.e. ~30secs instead of ~260secs on default. Hence, introduce necessary helper functions and fix this up properly as it should be. Introduced in 06da92283 ("[IPV6]: Add MLDv2 support."). Credits to Hannes Frederic Sowa who also had a hand in this as well. Also thanks to Hangbin Liu who did initial testing. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: David Stevens <dlstevens@us.ibm.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04SUNRPC: Ensure rpc_task->tk_pid is available for tracepointsTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-09-04net: ipv6: tcp: fix potential use after free in tcp_v6_do_rcvDaniel Borkmann
In tcp_v6_do_rcv() code, when processing pkt options, we soley work on our skb clone opt_skb that we've created earlier before entering tcp_rcv_established() on our way. However, only in condition ... if (np->rxopt.bits.rxtclass) np->rcv_tclass = ipv6_get_dsfield(ipv6_hdr(skb)); ... we work on skb itself. As we extract every other information out of opt_skb in ipv6_pktoptions path, this seems wrong, since skb can already be released by tcp_rcv_established() earlier on. When we try to access it in ipv6_hdr(), we will dereference freed skb. [ Bug added by commit 4c507d2897bd9b ("net: implement IP_RECVTOS for IP_PKTOPTIONS") ] Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04tcp: better comments for RTO initiallizationYuchung Cheng
Commit 1b7fdd2ab585("tcp: do not use cached RTT for RTT estimation") removes important comments on how RTO is initialized and updated. Hopefully this patch puts those information back. Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>