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2015-07-21openvswitch: allocate nr_node_ids flow_stats instead of num_possible_nodesChris J Arges
Some architectures like POWER can have a NUMA node_possible_map that contains sparse entries. This causes memory corruption with openvswitch since it allocates flow_cache with a multiple of num_possible_nodes() and assumes the node variable returned by for_each_node will index into flow->stats[node]. Use nr_node_ids to allocate a maximal sparse array instead of num_possible_nodes(). The crash was noticed after 3af229f2 was applied as it changed the node_possible_map to match node_online_map on boot. Fixes: 3af229f2071f5b5cb31664be6109561fbe19c861 Signed-off-by: Chris J Arges <chris.j.arges@canonical.com> Acked-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21netlink: don't hold mutex in rcu callback when releasing mmapd ringFlorian Westphal
Kirill A. Shutemov says: This simple test-case trigers few locking asserts in kernel: int main(int argc, char **argv) { unsigned int block_size = 16 * 4096; struct nl_mmap_req req = { .nm_block_size = block_size, .nm_block_nr = 64, .nm_frame_size = 16384, .nm_frame_nr = 64 * block_size / 16384, }; unsigned int ring_size; int fd; fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (setsockopt(fd, SOL_NETLINK, NETLINK_RX_RING, &req, sizeof(req)) < 0) exit(1); if (setsockopt(fd, SOL_NETLINK, NETLINK_TX_RING, &req, sizeof(req)) < 0) exit(1); ring_size = req.nm_block_nr * req.nm_block_size; mmap(NULL, 2 * ring_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); return 0; } +++ exited with 0 +++ BUG: sleeping function called from invalid context at /home/kas/git/public/linux-mm/kernel/locking/mutex.c:616 in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: init 3 locks held by init/1: #0: (reboot_mutex){+.+...}, at: [<ffffffff81080959>] SyS_reboot+0xa9/0x220 #1: ((reboot_notifier_list).rwsem){.+.+..}, at: [<ffffffff8107f379>] __blocking_notifier_call_chain+0x39/0x70 #2: (rcu_callback){......}, at: [<ffffffff810d32e0>] rcu_do_batch.isra.49+0x160/0x10c0 Preemption disabled at:[<ffffffff8145365f>] __delay+0xf/0x20 CPU: 1 PID: 1 Comm: init Not tainted 4.1.0-00009-gbddf4c4818e0 #253 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Debian-1.8.2-1 04/01/2014 ffff88017b3d8000 ffff88027bc03c38 ffffffff81929ceb 0000000000000102 0000000000000000 ffff88027bc03c68 ffffffff81085a9d 0000000000000002 ffffffff81ca2a20 0000000000000268 0000000000000000 ffff88027bc03c98 Call Trace: <IRQ> [<ffffffff81929ceb>] dump_stack+0x4f/0x7b [<ffffffff81085a9d>] ___might_sleep+0x16d/0x270 [<ffffffff81085bed>] __might_sleep+0x4d/0x90 [<ffffffff8192e96f>] mutex_lock_nested+0x2f/0x430 [<ffffffff81932fed>] ? _raw_spin_unlock_irqrestore+0x5d/0x80 [<ffffffff81464143>] ? __this_cpu_preempt_check+0x13/0x20 [<ffffffff8182fc3d>] netlink_set_ring+0x1ed/0x350 [<ffffffff8182e000>] ? netlink_undo_bind+0x70/0x70 [<ffffffff8182fe20>] netlink_sock_destruct+0x80/0x150 [<ffffffff817e484d>] __sk_free+0x1d/0x160 [<ffffffff817e49a9>] sk_free+0x19/0x20 [..] Cong Wang says: We can't hold mutex lock in a rcu callback, [..] Thomas Graf says: The socket should be dead at this point. It might be simpler to add a netlink_release_ring() function which doesn't require locking at all. Reported-by: "Kirill A. Shutemov" <kirill@shutemov.name> Diagnosed-by: Cong Wang <cwang@twopensource.com> Suggested-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21Merge branch 'arm-bpf-fixes'David S. Miller
Nicolas Schichan says: ==================== BPF JIT fixes for ARM These patches are fixing bugs in the ARM JIT and should probably find their way to a stable kernel. All 60 test_bpf tests in Linux 4.1 release are now passing OK (was 54 out of 60 before). ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21ARM: net: fix vlan access instructions in ARM JIT.Nicolas Schichan
This makes BPF_ANC | SKF_AD_VLAN_TAG and BPF_ANC | SKF_AD_VLAN_TAG_PRESENT have the same behaviour as the in kernel VM and makes the test_bpf LD_VLAN_TAG and LD_VLAN_TAG_PRESENT tests pass. Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21ARM: net: handle negative offsets in BPF JIT.Nicolas Schichan
Previously, the JIT would reject negative offsets known during code generation and mishandle negative offsets provided at runtime. Fix that by calling bpf_internal_load_pointer_neg_helper() appropriately in the jit_get_skb_{b,h,w} slow path helpers and by forcing the execution flow to the slow path helpers when the offset is negative. Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21ARM: net: fix condition for load_order > 0 when translating load instructions.Nicolas Schichan
To check whether the load should take the fast path or not, the code would check that (r_skb_hlen - load_order) is greater than the offset of the access using an "Unsigned higher or same" condition. For halfword accesses and an skb length of 1 at offset 0, that test is valid, as we end up comparing 0xffffffff(-1) and 0, so the fast path is taken and the filter allows the load to wrongly succeed. A similar issue exists for word loads at offset 0 and an skb length of less than 4. Fix that by using the condition "Signed greater than or equal" condition for the fast path code for load orders greater than 0. Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21tcp: suppress a division by zero warningEric Dumazet
Andrew Morton reported following warning on one ARM build with gcc-4.4 : net/ipv4/inet_hashtables.c: In function 'inet_ehash_locks_alloc': net/ipv4/inet_hashtables.c:617: warning: division by zero Even guarded with a test on sizeof(spinlock_t), compiler does not like current construct on a !CONFIG_SMP build. Remove the warning by using a temporary variable. Fixes: 095dc8e0c368 ("tcp: fix/cleanup inet_ehash_locks_alloc()") Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21Merge tag 'wireless-drivers-for-davem-2015-07-20' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers Kalle Valo says: ==================== ath9k: * fix device ID check for AR956x iwlwifi: * bug fixes specific for 8000 series * fix a crash in time events * fix a crash in PCIe transport * fix BT Coex code that prevented association on certain devices (3160). * revert the new RBD allocation model because it introduced a bug when running on weak VM setups. * new device IDs ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21drivers: net: cpsw: remove tx event processing in rx napi pollMugunthan V N
With commit c03abd84634d ("net: ethernet: cpsw: don't requests IRQs we don't use") common isr and napi are separated into separate tx isr and rx isr/napi, but still in rx napi tx events are handled. So removing the tx event handling in rx napi. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21inet: frags: fix defragmented packet's IP header for af_packetEdward Hyunkoo Jee
When ip_frag_queue() computes positions, it assumes that the passed sk_buff does not contain L2 headers. However, when PACKET_FANOUT_FLAG_DEFRAG is used, IP reassembly functions can be called on outgoing packets that contain L2 headers. Also, IPv4 checksum is not corrected after reassembly. Fixes: 7736d33f4262 ("packet: Add pre-defragmentation support for ipv4 fanouts.") Signed-off-by: Edward Hyunkoo Jee <edjee@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Jerry Chu <hkchu@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21net: mvneta: fix refilling for Rx DMA buffersSimon Guinot
With the actual code, if a memory allocation error happens while refilling a Rx descriptor, then the original Rx buffer is both passed to the networking stack (in a SKB) and let in the Rx ring. This leads to various kernel oops and crashes. As a fix, this patch moves Rx descriptor refilling ahead of building SKB with the associated Rx buffer. In case of a memory allocation failure, data is dropped and the original DMA buffer is put back into the Rx ring. Signed-off-by: Simon Guinot <simon.guinot@sequanux.org> Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network unit") Cc: <stable@vger.kernel.org> # v3.8+ Tested-by: Yoann Sculo <yoann@sculo.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21stmmac: fix setting of driver data in stmmac_dvr_probeJoachim Eastwood
Commit 803f8fc46274b ("stmmac: move driver data setting into stmmac_dvr_probe") mistakenly set priv and not priv->dev as driver data. This meant that the remove, resume and suspend callbacks that fetched and tried to use this data would most likely explode. Fix the issue by using the correct variable. Fixes: 803f8fc46274b ("stmmac: move driver data setting into stmmac_dvr_probe") Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21Merge branch 'sch_panic'David S. Miller
Daniel Borkmann says: ==================== Couple of classifier fixes This fixes a couple of panics in the form of (analogous for cls_flow{,er}): [ 912.759276] BUG: unable to handle kernel NULL pointer dereference at (null) [ 912.759373] IP: [<ffffffffa09d4d6d>] cls_bpf_change+0x23d/0x268 [cls_bpf] [ 912.759441] PGD 8783c067 PUD 5f684067 PMD 0 [ 912.759491] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC [ 912.759543] Modules linked in: cls_bpf(E) act_gact [...] [ 912.772734] CPU: 3 PID: 10489 Comm: tc Tainted: G W E 4.2.0-rc2+ #73 [ 912.775004] Hardware name: Apple Inc. MacBookAir5,1/Mac-66F35F19FE2A0D05, BIOS MBA51.88Z.00EF.B02.1211271028 11/27/2012 [ 912.777327] task: ffff88025eaa8000 ti: ffff88005f734000 task.ti: ffff88005f734000 [ 912.779662] RIP: 0010:[<ffffffffa09d4d6d>] [<ffffffffa09d4d6d>] cls_bpf_change+0x23d/0x268 [cls_bpf] [ 912.781991] RSP: 0018:ffff88005f7379c8 EFLAGS: 00010286 [ 912.784183] RAX: ffff880201d64e48 RBX: 0000000000000000 RCX: ffff880201d64e40 [ 912.786402] RDX: 0000000000000000 RSI: ffffffffa09d51c0 RDI: ffffffffa09d51a6 [ 912.788625] RBP: ffff88005f737a68 R08: 0000000000000000 R09: 0000000000000000 [ 912.790854] R10: 0000000000000001 R11: 0000000000000001 R12: ffff880078ab5a80 [ 912.793082] R13: ffff880232b31570 R14: ffff88005f737ae0 R15: ffff8801e215d1d0 [ 912.795181] FS: 00007f3c0c80d740(0000) GS:ffff880265400000(0000) knlGS:0000000000000000 [ 912.797281] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 912.799402] CR2: 0000000000000000 CR3: 000000005460f000 CR4: 00000000001407e0 [ 912.799403] Stack: [ 912.799407] ffffffff00000000 ffff88023ea18000 000000005f737a08 0000000000000000 [ 912.799415] ffffffff81f06140 ffff880201d64e40 0000000000000000 ffff88023ea1804c [ 912.799418] 0000000000000000 ffff88023ea18044 ffff88023ea18030 ffff88023ea18038 [ 912.799418] Call Trace: [ 912.799437] [<ffffffff816d5685>] tc_ctl_tfilter+0x335/0x910 [ 912.799443] [<ffffffff813622a8>] ? security_capable+0x48/0x60 [ 912.799448] [<ffffffff816b90e5>] rtnetlink_rcv_msg+0x95/0x240 [ 912.799454] [<ffffffff810f612d>] ? trace_hardirqs_on+0xd/0x10 [ 912.799456] [<ffffffff816b902f>] ? rtnetlink_rcv+0x1f/0x40 [ 912.799459] [<ffffffff816b902f>] ? rtnetlink_rcv+0x1f/0x40 [ 912.799461] [<ffffffff816b9050>] ? rtnetlink_rcv+0x40/0x40 [ 912.799464] [<ffffffff816df38f>] netlink_rcv_skb+0xaf/0xc0 [ 912.799467] [<ffffffff816b903e>] rtnetlink_rcv+0x2e/0x40 [ 912.799469] [<ffffffff816deaef>] netlink_unicast+0xef/0x1b0 [ 912.799471] [<ffffffff816defa0>] netlink_sendmsg+0x3f0/0x620 [ 912.799476] [<ffffffff81687028>] sock_sendmsg+0x38/0x50 [ 912.799479] [<ffffffff81687938>] ___sys_sendmsg+0x288/0x290 [ 912.799482] [<ffffffff810f7852>] ? __lock_acquire+0x572/0x2050 [ 912.799488] [<ffffffff810265db>] ? native_sched_clock+0x2b/0x90 [ 912.799493] [<ffffffff8116135f>] ? __audit_syscall_entry+0xaf/0x100 [ 912.799497] [<ffffffff8116135f>] ? __audit_syscall_entry+0xaf/0x100 [ 912.799501] [<ffffffff8112aa19>] ? current_kernel_time+0x69/0xd0 [ 912.799505] [<ffffffff81266f16>] ? __fget_light+0x66/0x90 [ 912.799508] [<ffffffff81688812>] __sys_sendmsg+0x42/0x80 [ 912.799510] [<ffffffff81688862>] SyS_sendmsg+0x12/0x20 [ 912.799515] [<ffffffff817f9a6e>] entry_SYSCALL_64_fastpath+0x12/0x76 [ 912.799540] Code: 4d 88 49 8b 57 08 48 89 51 08 49 8b 57 10 48 89 c8 48 83 c0 08 48 89 51 10 48 8b 51 10 48 c7 c6 c0 51 9d a0 48 c7 c7 a6 51 9d a0 <48> 89 02 48 8b 51 08 48 89 42 08 48 b8 00 02 20 00 00 00 ad de [ 912.799544] RIP [<ffffffffa09d4d6d>] cls_bpf_change+0x23d/0x268 [cls_bpf] [ 912.799544] RSP <ffff88005f7379c8> [ 912.799545] CR2: 0000000000000000 [ 912.807380] ---[ end trace a6440067cfdc7c29 ]--- I've split them into 3 patches, so they can be backported easier when needed. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21sched: cls_flow: fix panic on filter replaceDaniel Borkmann
The following test case causes a NULL pointer dereference in cls_flow: tc filter add dev foo parent 1: handle 0x1 flow hash keys dst action ok tc filter replace dev foo parent 1: pref 49152 handle 0x1 \ flow hash keys mark action drop To be more precise, actually two different panics are fixed, the first occurs because tcf_exts_init() is not called on the newly allocated filter when we do a replace. And the second panic uncovered after that happens since the arguments of list_replace_rcu() are swapped, the old element needs to be the first argument and the new element the second. Fixes: 70da9f0bf999 ("net: sched: cls_flow use RCU") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21sched: cls_flower: fix panic on filter replaceDaniel Borkmann
The following test case causes a NULL pointer dereference in cls_flower: tc filter add dev foo parent 1: flower eth_type ipv4 action ok flowid 1:1 tc filter replace dev foo parent 1: pref 49152 handle 0x1 \ flower eth_type ipv6 action ok flowid 1:1 The problem is that commit 77b9900ef53a ("tc: introduce Flower classifier") accidentally swapped the arguments of list_replace_rcu(), the old element needs to be the first argument and the new element the second. Fixes: 77b9900ef53a ("tc: introduce Flower classifier") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21sched: cls_bpf: fix panic on filter replaceDaniel Borkmann
The following test case causes a NULL pointer dereference in cls_bpf: FOO="1,6 0 0 4294967295," tc filter add dev foo parent 1: bpf bytecode "$FOO" flowid 1:1 action ok tc filter replace dev foo parent 1: pref 49152 handle 0x1 \ bpf bytecode "$FOO" flowid 1:1 action drop The problem is that commit 1f947bf151e9 ("net: sched: rcu'ify cls_bpf") accidentally swapped the arguments of list_replace_rcu(), the old element needs to be the first argument and the new element the second. Fixes: 1f947bf151e9 ("net: sched: rcu'ify cls_bpf") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21Merge tag 'mac80211-for-davem-2015-07-17' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Some fixes for the current cycle: 1. Arik introduced an rtnl-locked regulatory API to be able to differentiate between place do/don't have the RTNL; this fixes missing locking in some of the code paths 2. Two small mesh bugfixes from Bob, one to avoid treating a certain malformed over-the-air frame and one to avoid sending a garbage field over the air. 3. A fix for powersave during WoWLAN suspend from Krishna Chaitanya. 4. A fix for a powersave vs. aggregation teardown race, from Michal. 5. Thomas reduced the loglevel of CRDA messages to avoid spamming the kernel log with mostly irrelevant information. 6. Tom fixed a dangling debugfs directory pointer that could cause crashes if subsequent addition of the same interface to debugfs failed for some reason. 7. A fix from myself for a list corruption issue in mac80211 during combined interface shutdown/removal - shut down interfaces first and only then remove them to avoid that. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21net/mdio: fix mdio_bus_match for c45 PHYShaohui Xie
We store c45 PHY's id information in c45_ids, so it should be used to check the matching between PHY driver and PHY device for c45 PHY. Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21net: ratelimit warnings about dst entry refcount underflow or overflowKonstantin Khlebnikov
Kernel generates a lot of warnings when dst entry reference counter overflows and becomes negative. That bug was seen several times at machines with outdated 3.10.y kernels. Most like it's already fixed in upstream. Anyway that flood completely kills machine and makes further debugging impossible. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21caif: fix leaks and race in caif_queue_rcv_skb()Eric Dumazet
1) If sk_filter() is applied, skb was leaked (not freed) 2) Testing SOCK_DEAD twice is racy : packet could be freed while already queued. 3) Remove obsolete comment about caching skb->len Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20qmi_wwan: add the second QMI/network interface for Sierra Wireless MC7305/MC7355Reinhard Speyerer
Sierra Wireless MC7305/MC7355 with USB ID 1199:9041 also provide a second QMI/network interface like the MC73xx with USB ID 1199:68c0 on USB interface #10 when used in the appropriate USB configuration. Add the corresponding QMI_FIXED_INTF entry to the qmi_wwan driver. Please note that the second QMI/network interface is not working for early MC73xx firmware versions like 01.08.x as the device does not respond to QMI messages on the second /dev/cdc-wdm port. Signed-off-by: Reinhard Speyerer <rspmn@arcor.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20ravb: fix race updating TCCRSergei Shtylyov
The TCCR.TSRQn bit may get clearead after TCCR gets read, so that TCCR write would get skipped. We don't need to check this bit before setting. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20net: netcp: fix improper initialization in netcp_ndo_open()Karicheri, Muralidharan
The keystone qmss will raise interrupt when packet arrive at the receive queue. Only control available to avoid interrupt from happening is to keep the free descriptor queue (FDQ) empty in the receive side. So the filling of descriptors into the FDQ has to happen after request_irq() call is made as part of knav_queue_enable_notify(). So move the function netcp_rxpool_refill() after this call. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20bonding: correct the MAC address for "follow" fail_over_mac policydingtianhong
The "follow" fail_over_mac policy is useful for multiport devices that either become confused or incur a performance penalty when multiple ports are programmed with the same MAC address, but the same MAC address still may happened by this steps for this policy: 1) echo +eth0 > /sys/class/net/bond0/bonding/slaves bond0 has the same mac address with eth0, it is MAC1. 2) echo +eth1 > /sys/class/net/bond0/bonding/slaves eth1 is backup, eth1 has MAC2. 3) ifconfig eth0 down eth1 became active slave, bond will swap MAC for eth0 and eth1, so eth1 has MAC1, and eth0 has MAC2. 4) ifconfig eth1 down there is no active slave, and eth1 still has MAC1, eth2 has MAC2. 5) ifconfig eth0 up the eth0 became active slave again, the bond set eth0 to MAC1. Something wrong here, then if you set eth1 up, the eth0 and eth1 will have the same MAC address, it will break this policy for ACTIVE_BACKUP mode. This patch will fix this problem by finding the old active slave and swap them MAC address before change active slave. Signed-off-by: Ding Tianhong <dingtianhong@huawei.com> Tested-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20Merge tag 'linux-can-fixes-for-4.2-20150716' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2015-07-16 this is a pull request of 2 patches by Stefan Agner. He fixes the resume operation in the mcp251x driver. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20Revert "sit: Add gro callbacks to sit_offload"Herbert Xu
This patch reverts 19424e052fb44da2f00d1a868cbb51f3e9f4bbb5 ("sit: Add gro callbacks to sit_offload") because it generates packets that cannot be handled even by our own GSO. Reported-by: Wolfgang Walter <linux@stwm.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20net: dsa: bcm_sf2: do not use indirect reads and writes for 7445E0Florian Fainelli
7445E0 contains an ECO which disconnected the internal SF2 pseudo-PHY which was known to conflict with the external pseudo-PHY of BCM53125 switches. This motivated the need to utilize the internal SF2 MDIO controller via indirect register reads/writes to control external Broadcom switches due to this address conflict (both responded at address 30d). For 7445E0, the internal pseudo-PHY of the SF2 switch got disconnected, and as a consequence this prevents the internal SF2 MDIO bus controller from reading data (reads back everything as 0) since the MDI line is tied low. Fix this by making the indirect register reads and writes conditional to 7445D0, on 7445E0 we can utilize the SWITCH_MDIO controller (backed by mdio-unimac and not the DSA created slave MII bus). We utilize of_machine_is_compatible() here since this is the only way for use to differentiate between these two chips in a way that does not violate layers or becomes (too) vendor-specific. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20bonding: correctly handle bonding type change on enslave failureNikolay Aleksandrov
If the bond is enslaving a device with different type it will be setup by it, but if after being setup the enslave fails the bond doesn't switch back its type and also keeps pointers to foreign structures that can be long gone. Thus revert back any type changes if the enslave failed and the bond had to change its type. Example: Before patch: $ echo lo > bond0/bonding/slaves -bash: echo: write error: Cannot assign requested address $ ip l sh bond0 20: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/loopback 16:54:78:34:bd:41 brd 00:00:00:00:00:00 $ echo +eth1 > bond0/bonding/slaves $ ip l sh bond0 20: bond0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 52:54:00:3f:47:69 brd ff:ff:ff:ff:ff:ff (notice the MASTER flag is gone) After patch: $ echo lo > bond0/bonding/slaves -bash: echo: write error: Cannot assign requested address $ ip l sh bond0 21: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 6e:66:94:f6:07:fc brd ff:ff:ff:ff:ff:ff $ echo +eth1 > bond0/bonding/slaves $ ip l sh bond0 21: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 52:54:00:3f:47:69 brd ff:ff:ff:ff:ff:ff Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Fixes: e36b9d16c6a6 ("bonding: clean muticast addresses when device changes type") Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20bonding: fix destruction of bond with devices different from arphrd_etherNikolay Aleksandrov
When the bonding is being unloaded and the netdevice notifier is unregistered it executes NETDEV_UNREGISTER for each device which should remove the bond's proc entry but if the device enslaved is not of ARPHRD_ETHER type and is in front of the bonding, it may execute bond_release_and_destroy() first which would release the last slave and destroy the bond device leaving the proc entry and thus we will get the following error (with dynamic debug on for bond_netdev_event to see the events order): [ 908.963051] eql: event: 9 [ 908.963052] eql: IFF_SLAVE [ 908.963054] eql: event: 2 [ 908.963056] eql: IFF_SLAVE [ 908.963058] eql: event: 6 [ 908.963059] eql: IFF_SLAVE [ 908.963110] bond0: Releasing active interface eql [ 908.976168] bond0: Destroying bond bond0 [ 908.976266] bond0 (unregistering): Released all slaves [ 908.984097] ------------[ cut here ]------------ [ 908.984107] WARNING: CPU: 0 PID: 1787 at fs/proc/generic.c:575 remove_proc_entry+0x112/0x160() [ 908.984110] remove_proc_entry: removing non-empty directory 'net/bonding', leaking at least 'bond0' [ 908.984111] Modules linked in: bonding(-) eql(O) 9p nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ppdev qxl drm_kms_helper snd_hda_codec_generic aesni_intel ttm aes_x86_64 glue_helper pcspkr lrw gf128mul ablk_helper cryptd snd_hda_intel virtio_console snd_hda_codec psmouse serio_raw snd_hwdep snd_hda_core 9pnet_virtio 9pnet evdev joydev drm virtio_balloon snd_pcm snd_timer snd soundcore i2c_piix4 i2c_core pvpanic acpi_cpufreq parport_pc parport processor thermal_sys button autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid hid sg sr_mod cdrom ata_generic virtio_blk virtio_net floppy ata_piix e1000 libata ehci_pci virtio_pci scsi_mod uhci_hcd ehci_hcd virtio_ring virtio usbcore usb_common [last unloaded: bonding] [ 908.984168] CPU: 0 PID: 1787 Comm: rmmod Tainted: G W O 4.2.0-rc2+ #8 [ 908.984170] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 908.984172] 0000000000000000 ffffffff81732d41 ffffffff81525b34 ffff8800358dfda8 [ 908.984175] ffffffff8106c521 ffff88003595af78 ffff88003595af40 ffff88003e3a4280 [ 908.984178] ffffffffa058d040 0000000000000000 ffffffff8106c59a ffffffff8172ebd0 [ 908.984181] Call Trace: [ 908.984188] [<ffffffff81525b34>] ? dump_stack+0x40/0x50 [ 908.984193] [<ffffffff8106c521>] ? warn_slowpath_common+0x81/0xb0 [ 908.984196] [<ffffffff8106c59a>] ? warn_slowpath_fmt+0x4a/0x50 [ 908.984199] [<ffffffff81218352>] ? remove_proc_entry+0x112/0x160 [ 908.984205] [<ffffffffa05850e6>] ? bond_destroy_proc_dir+0x26/0x30 [bonding] [ 908.984208] [<ffffffffa057540e>] ? bond_net_exit+0x8e/0xa0 [bonding] [ 908.984217] [<ffffffff8142f407>] ? ops_exit_list.isra.4+0x37/0x70 [ 908.984225] [<ffffffff8142f52d>] ? unregister_pernet_operations+0x8d/0xd0 [ 908.984228] [<ffffffff8142f58d>] ? unregister_pernet_subsys+0x1d/0x30 [ 908.984232] [<ffffffffa0585269>] ? bonding_exit+0x23/0xdba [bonding] [ 908.984236] [<ffffffff810e28ba>] ? SyS_delete_module+0x18a/0x250 [ 908.984241] [<ffffffff81086f99>] ? task_work_run+0x89/0xc0 [ 908.984244] [<ffffffff8152b732>] ? entry_SYSCALL_64_fastpath+0x16/0x75 [ 908.984247] ---[ end trace 7c006ed4abbef24b ]--- Thus remove the proc entry manually if bond_release_and_destroy() is used. Because of the checks in bond_remove_proc_entry() it's not a problem for a bond device to change namespaces (the bug fixed by the Fixes commit) but since commit f9399814927ad ("bonding: Don't allow bond devices to change network namespaces.") that can't happen anyway. Reported-by: Carol Soto <clsoto@linux.vnet.ibm.com> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Fixes: a64d49c3dd50 ("bonding: Manage /proc/net/bonding/ entries from the netdev events") Tested-by: Carol L Soto <clsoto@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20net: dsa: mv88e6xxx: fix fid_mask when leaving bridgeVivien Didelot
The mv88e6xxx_priv_state structure contains an fid_mask, where 1 means the FID is free to use, 0 means the FID is in use. This patch fixes the bit clear in mv88e6xxx_leave_bridge() when assigning a new FID to a port. Example scenario: I have 7 ports, port 5 is CPU, port 6 is unused (no PHY). After setting the ports 0, 1 and 2 in bridge br0, and ports 3 and 4 in bridge br1, I have the following fid_mask: 0b111110010110 (0xf96). Indeed, br0 uses FID 0, and br1 uses FID 3. After setting nomaster for port 0, I get the wrong fid_mask: 0b10 (0x2). With this patch we correctly get 0b111110010100 (0xf94), meaning port 0 uses FID 1, br0 uses FID 0, and br1 uses FID 3. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-20virtio_net: don't require ANY_LAYOUT with VERSION_1Michael S. Tsirkin
ANY_LAYOUT is a compatibility feature. It's implied for VERSION_1 devices, and non-transitional devices might not offer it. Change code to behave accordingly. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-17cfg80211: use RTNL locked reg_can_beacon for IR-relaxationArik Nemtsov
The RTNL is required to check for IR-relaxation conditions that allow more channels to beacon. Export an RTNL locked version of reg_can_beacon and use it where possible in AP/STA interface type flows, where IR-relaxation may be applicable. Fixes: 06f207fc5418 ("cfg80211: change GO_CONCURRENT to IR_CONCURRENT for STA") Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: add missing length check for confirm framesBob Copeland
Although mesh_rx_plink_frame() already checks that frames have enough bytes for the action code plus another two bytes for capability/reason code, it doesn't take into account that confirm frames also have an additional two-byte aid. As a result, a corrupt frame could cause a subsequent subtraction to wrap around to ill effect. Add another check for this case. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: correct aid location in peering framesBob Copeland
According to 802.11-2012 8.5.16.3.2 AID comes directly after the capability bytes in mesh peering confirm frames. The existing code, however, was adding a 2 byte offset to this location, resulting in garbage data going out over the air. Remove the offset to fix it. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17wireless: regulatory: reduce log level of CRDA related messagesThomas Petazzoni
With a basic Linux userspace, the messages "Calling CRDA to update world regulatory domain" appears 10 times after boot every second or so, followed by a final "Exceeded CRDA call max attempts. Not calling CRDA". For those of us not having the corresponding userspace parts, having those messages repeatedly displayed at boot time is a bit annoying, so this commit reduces their log level to pr_debug(). Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: shut down interfaces before destroying interface listJohannes Berg
If the hardware is unregistered while interfaces are up, mac80211 will unregister all interfaces, which in turns causes mac80211 to be called again to remove them all from the driver and eventually shut down the hardware. During this shutdown, however, it's currently already unsafe to iterate the list of interfaces atomically, as the list is manipulated in an unsafe manner. This puts an undue burden on the driver - it must stop all its activities before calling ieee80211_unregister_hw(), while in the normal stop path it can do all cleanup in the stop method. If, for example, it's using the iteration during RX for some reason, it would have to stop RX before unregistering to avoid crashes. Fix this problem by closing all interfaces before unregistering them. This will cause the driver stop to have completed before we manipulate the interface list, and after the driver is stopped *and* has called ieee80211_unregister_hw() it really musn't be iterating any more as the memory will be freed as well. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: wowlan: enable powersave if suspend while ps-pollingChaitanya T K
If for any reason we're in the middle of PS-polling or awake after TX due to dynamic powersave while going to suspend, go back to save power. This might cause a response frame to get lost, but since we can't really wait for it while going to suspend that's still better than not enabling powersave which would cause higher power usage during (and possibly even after) suspend. Note that this really only affects the very few drivers that use the powersave implementation in mac80211. Signed-off-by: Chaitanya T K <chaitanya.mgit@gmail.com> [rewrite misleading commit log] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: don't clear all tx flags when requeingMichal Kazior
When acting as AP and a PS-Poll frame is received associated station is marked as one in a Service Period. This state is kept until Tx status for released frame is reported. While a station is in Service Period PS-Poll frames are ignored. However if PS-Poll was received during A-MPDU teardown it was possible to have the to-be released frame re-queued back to pending queue. In such case the frame was stripped of 2 important flags: (a) IEEE80211_TX_CTL_NO_PS_BUFFER (b) IEEE80211_TX_STATUS_EOSP Stripping of (a) led to the frame that was to be released to be queued back to ps_tx_buf queue. If station remained to use only PS-Poll frames the re-queued frame (and new ones) was never actually transmitted because mac80211 would ignore subsequent PS-Poll frames due to station being in Service Period. There was nothing left to clear the Service Period bit (no xmit -> no tx status -> no SP end), i.e. the AP would have the station stuck in Service Period. Beacon TIM would repeatedly prompt station to poll for frames but it would get none. Once (a) is not stripped (b) becomes important because it's the main condition to clear the Service Period bit of the station when Tx status for the released frame is reported back. This problem was observed with ath9k acting as P2P GO in some testing scenarios but isn't limited to it. AP operation with mac80211 based Tx A-MPDU control combined with clients using PS-Poll frames is subject to this race. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17mac80211: clear subdir_stations when removing debugfsTom Hughes
If we don't do this, and we then fail to recreate the debugfs directory during a mode change, then we will fail later trying to add stations to this now bogus directory: BUG: unable to handle kernel NULL pointer dereference at 0000006c IP: [<c0a92202>] mutex_lock+0x12/0x30 Call Trace: [<c0678ab4>] start_creating+0x44/0xc0 [<c0679203>] debugfs_create_dir+0x13/0xf0 [<f8a938ae>] ieee80211_sta_debugfs_add+0x6e/0x490 [mac80211] Cc: stable@kernel.org Signed-off-by: Tom Hughes <tom@compton.nu> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17Merge tag 'iwlwifi-for-kalle-2015-06-12' of ↵Kalle Valo
https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes * bug fixes specific for 8000 series * fix a crash in time events * fix a crash in PCIe transport * fix BT Coex code that prevented association on certain devices (3160). * revert the new RBD allocation model because it introduced a bug when running on weak VM setups. * a new device IDs
2015-07-17ravb: do not invalidate cache for RX buffer twiceSergei Shtylyov
First, dma_sync_single_for_cpu() shouldn't have been called in the first place (it's a streaming DMA API), dma_unmap_single() should have been called instead. Second, dma_unmap_single() call after handing the buffer to napi_gro_receive() makes little sense. Moreover desc->dptr might not be valid at this point. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-16can: mcp251x: get regulators optionallyStefan Agner
The regulators power and transceiver are optional. If those are not present, the pointer (or error pointer) is correctly handled by the driver, hence we can use devm_regulator_get_optional safely, which avoids regulators getting created. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-07-16can: mcp251x: fix resume when device is downStefan Agner
If a valid power regulator or a dummy regulator is used (which happens to be the case when no regulator is specified), restart_work is queued no matter whether the device was running or not at suspend time. Since work queues get initialized in the ndo_open callback, resuming leads to a NULL pointer exception. Reverse exactly the steps executed at suspend time: - Enable the power regulator in any case - Enable the transceiver regulator if the device was running, even in case we have a power regulator - Queue restart_work only in case the device was running Fixes: bf66f3736a94 ("can: mcp251x: Move to threaded interrupts instead of workqueues.") Signed-off-by: Stefan Agner <stefan@agner.ch> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-07-15Merge branch 'for-upstream' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth Johan Hedberg says: ==================== pull request: bluetooth 2015-07-15 Here's a regression fix for Broadcom Bluetooth adapters found at least in certain Apple laptops. The issue was introduced in 4.1 so there's the appropriate "Cc: stable" entry for it. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15tc: act_bpf: fix memory leakAlexei Starovoitov
prog->bpf_ops is populated when act_bpf is used with classic BPF and prog->bpf_name is optionally used with extended BPF. Fix memory leak when act_bpf is released. Fixes: d23b8ad8ab23 ("tc: add BPF based action") Fixes: a8cb5f556b56 ("act_bpf: add initial eBPF support for actions") Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15fq_codel: fix return value of fq_codel_drop()WANG Cong
The ->drop() is supposed to return the number of bytes it dropped, however fq_codel_drop() returns the index of the flow where it drops a packet from. Fix this by introducing a helper to wrap fq_codel_drop(). Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15net_sched: fix a use-after-free in sfqWANG Cong
Fixes: 25331d6ce42b ("net: sched: implement qstat helper routines") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15Merge branch 'ipvlan'David S. Miller
Konstantin Khlebnikov says: ==================== ipvlan: cleanups and fixes v1: http://comments.gmane.org/gmane.linux.network/363346 v2: http://comments.gmane.org/gmane.linux.network/369086 v3 has reduced set of patches from "ipvlan: fix ipv6 autoconfiguration". Here just cleanups and patch which ignores ipv6 notifications from RA. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15ipvlan: ignore addresses from ipv6 autoconfigurationKonstantin Khlebnikov
Inet6addr notifier is atomic and runs in bh context without RTNL when ipv6 receives router advertisement packet and performs autoconfiguration. Proper fix still in discussion. Let's at least plug the bug. v1: http://lkml.kernel.org/r/20150514135618.14062.1969.stgit@buzz v2: http://lkml.kernel.org/r/20150703125840.24121.91556.stgit@buzz Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-15ipvlan: use rcu_deference_bh() in ipvlan_queue_xmit()WANG Cong
In tx path rcu_read_lock_bh() is held, so we need rcu_deference_bh(). This fixes the following warning: =============================== [ INFO: suspicious RCU usage. ] 4.1.0-rc1+ #1007 Not tainted ------------------------------- drivers/net/ipvlan/ipvlan.h:106 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 1 lock held by dhclient/1076: #0: (rcu_read_lock_bh){......}, at: [<ffffffff817e8d84>] rcu_lock_acquire+0x0/0x26 stack backtrace: CPU: 2 PID: 1076 Comm: dhclient Not tainted 4.1.0-rc1+ #1007 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 0000000000000001 ffff8800d381bac8 ffffffff81a4154f 000000003c1a3c19 ffff8800d4d0a690 ffff8800d381baf8 ffffffff810b849f ffff880117d41148 ffff880117d40000 ffff880117d40068 0000000000000156 ffff8800d381bb18 Call Trace: [<ffffffff81a4154f>] dump_stack+0x4c/0x65 [<ffffffff810b849f>] lockdep_rcu_suspicious+0x107/0x110 [<ffffffff8165a522>] ipvlan_port_get_rcu+0x47/0x4e [<ffffffff8165ad14>] ipvlan_queue_xmit+0x35/0x450 [<ffffffff817ea45d>] ? rcu_read_unlock+0x3e/0x5f [<ffffffff810a20bf>] ? local_clock+0x19/0x22 [<ffffffff810b4781>] ? __lock_is_held+0x39/0x52 [<ffffffff8165b64c>] ipvlan_start_xmit+0x1b/0x44 [<ffffffff817edf7f>] dev_hard_start_xmit+0x2ae/0x467 [<ffffffff817ee642>] __dev_queue_xmit+0x50a/0x60c [<ffffffff817ee7a7>] dev_queue_xmit_sk+0x13/0x15 [<ffffffff81997596>] dev_queue_xmit+0x10/0x12 [<ffffffff8199b41c>] packet_sendmsg+0xb6b/0xbdf [<ffffffff810b5ea7>] ? mark_lock+0x2e/0x226 [<ffffffff810a1fcc>] ? sched_clock_cpu+0x9e/0xb7 [<ffffffff817d56f9>] sock_sendmsg_nosec+0x12/0x1d [<ffffffff817d7257>] sock_sendmsg+0x29/0x2e [<ffffffff817d72cc>] sock_write_iter+0x70/0x91 [<ffffffff81199563>] __vfs_write+0x7e/0xa7 [<ffffffff811996bc>] vfs_write+0x92/0xe8 [<ffffffff811997d7>] SyS_write+0x47/0x7e [<ffffffff81a4d517>] system_call_fastpath+0x12/0x6f Fixes: 2ad7bf363841 ("ipvlan: Initial check-in of the IPVLAN driver.") Cc: Mahesh Bandewar <maheshb@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Mahesh Bandewar <maheshb@google.com> Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-19 12:42:48 +0000