bisecting cause commit starting from 770fbb32d34e5d6298cc2be590c9d2fd6069aa17
building syzkaller on 78267cec1aaa5e066d66e6a6c76fea1753e51b46
testing commit 770fbb32d34e5d6298cc2be590c9d2fd6069aa17 with gcc (GCC) 8.1.0
kernel signature: 8239fe3f5243aa7f33555a917f5cf08910736a5487cade78e39d309d2dcda31b
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0
kernel signature: d5b96218ba82309f6313e557afc182c8e9532cd27f8dea88a7f868b185f9dec4
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0
kernel signature: e94ea07d58dd26b62894b3d3c64b003f811ca720f3e7e91982c4a2ccb3e66205
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: crashed: WARNING: ODEBUG bug in route4_change
run #8: crashed: WARNING: ODEBUG bug in route4_change
run #9: OK
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
kernel signature: 8cc8c387a16a90143c53a165a3441eb77480e47e41306c06ab8077221dbf5ee1
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in __route4_delete_filter
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #8: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #9: OK
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0
kernel signature: 7bedc124f3509acc56f29c62b4d6dcd49ad79c845831d2260e3e151ae51f7b71
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #8: OK
run #9: OK
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0
kernel signature: fc3a0b8b0abfb988f7b7e8a4cbb82caad5cb2bab9183c7f7a4767df1c5cbe87d
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #8: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #9: OK
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0
kernel signature: 3a22c47601190d95c37352160b3c8e593ad5a6d61f39d0cc6f9d272bb025516f
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in corrupted
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in corrupted
run #8: crashed: WARNING: locking bug in corrupted
run #9: OK
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0
kernel signature: eb1cd11c7749e118c1c33de33bb4d341b1aaa44fb84b0cc1fab5b6b55c6679ef
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: locking bug in corrupted
run #3: crashed: WARNING: locking bug in corrupted
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #8: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #9: OK
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0
kernel signature: ec550d9289b5cfcdb4339baf43675354286222d228bcd10c6c2ec7743e2aef06
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: OK
run #8: OK
run #9: OK
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0
kernel signature: a2ea1d80eee01bdf8d74dfddfc8120eafa82aa98db55505864d64ca77e1caa52
run #0: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #1: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #2: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #3: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #4: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #5: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #6: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #7: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #8: crashed: WARNING: ODEBUG bug in tcf_queue_work
run #9: OK
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
kernel signature: 151bc418c1d2c2de7e3e667a72463f676bd4a65331d04ea67716d8daa08960ab
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: OK
run #8: OK
run #9: OK
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
kernel signature: e634b173c3e6eee4d850d2eb15077f0516edc8aa3d191204877070715b6535e1
all runs: crashed: WARNING: ODEBUG bug in route4_change
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
kernel signature: 4011b08a84e75308c4f0eba8ee3bd6dda31ba9633f6058c84d14d7ab522da5b5
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: crashed: WARNING: ODEBUG bug in route4_change
run #8: crashed: WARNING: ODEBUG bug in route4_change
run #9: OK
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
kernel signature: 546700b8f8c8ae05afca2828302a7d3b6faf1a9a7e208deecb01e582f95485ee
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: crashed: WARNING: ODEBUG bug in route4_change
run #8: crashed: WARNING: ODEBUG bug in route4_change
run #9: OK
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
kernel signature: 3f865635ed085399e73562c37cac0d5196bc9164f027f2dd5ee2079b2a72e29b
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: OK
run #8: OK
run #9: OK
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
kernel signature: dca4580ed8a07a48bf8d29c2a8f91e82ce42fdb46b8723590aa28ad5b6f9748e
all runs: crashed: BUG: sleeping function called from invalid context in tap_get_minor
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0
kernel signature: 50078a9ed52119de762a70226c95704e53519da1a8c3038d21f97d8d2e93362d
all runs: crashed: BUG: sleeping function called from invalid context in tap_get_minor
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0
kernel signature: 0298ad9a1f0236a78928016aaa2e5a17e112434dbd1a8c236cca1c3defc70420
all runs: crashed: WARNING: ODEBUG bug in route4_change
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
kernel signature: 495b613ab13172dec4f3b9ca971b87ae8df4a954625bc64643bfb74ed9387d04
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: crashed: WARNING: ODEBUG bug in route4_change
run #8: OK
run #9: OK
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
kernel signature: 8f699606730290cf1bd94259df5356c205ee29c5fbaa7341315046c61d9ffb06
all runs: crashed: WARNING: ODEBUG bug in route4_change
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
kernel signature: a94aad9495f711188647b575c749da86c105ffd76730b67329681c3ce4a8d92d
run #0: crashed: WARNING: ODEBUG bug in route4_change
run #1: crashed: WARNING: ODEBUG bug in route4_change
run #2: crashed: WARNING: ODEBUG bug in route4_change
run #3: crashed: WARNING: ODEBUG bug in route4_change
run #4: crashed: WARNING: ODEBUG bug in route4_change
run #5: crashed: WARNING: ODEBUG bug in route4_change
run #6: crashed: WARNING: ODEBUG bug in route4_change
run #7: crashed: WARNING: ODEBUG bug in route4_change
run #8: crashed: WARNING: ODEBUG bug in route4_change
run #9: OK
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
kernel signature: 6ebac3f626e3e06683f995f5f06ddd358c5ac1dc66b73bfe980583058f5b508e
all runs: crashed: WARNING in sysfs_warn_dup
revisions tested: 22, total time: 5h14m25.976625885s (build: 1h57m16.980288727s, test: 3h14m46.876293595s)
the crash already happened on the oldest tested release
commit msg: Linux 4.6
crash: WARNING in sysfs_warn_dup
IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready
bond0: Enslaving bond_slave_0 as an active interface with an up link
bond0: Enslaving bond_slave_1 as an active interface with an up link
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7937 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30
sysfs: cannot create duplicate filename '/class/macvtap/tap50'
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7937 Comm: syz-executor.4 Not tainted 4.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 1ffffffff0d95756 ffff8800b1c26fb0 ffffffff82c74fc6 ffffffff85c81040
 ffff8800b1c27088 ffffffff85d2bac0 ffffffff81922ccb ffff8800b1c27078
 ffffffff8160cf4e 0000000041b58ab3 ffffffff868f1f61 ffffffff8160cd9f
Call Trace:
 [<ffffffff82c74fc6>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82c74fc6>] dump_stack+0xe6/0x120 lib/dump_stack.c:51
 [<ffffffff81922ccb>] ? sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30
 [<ffffffff8160cf4e>] panic+0x1af/0x348 kernel/panic.c:152
 [<ffffffff8160cd9f>] ? set_ti_thread_flag+0xf/0xf include/linux/thread_info.h:73
 [<ffffffff81922ccb>] ? sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30
 [<ffffffff8133960d>] __warn+0x18d/0x1b0 kernel/panic.c:504
 [<ffffffff813396c2>] warn_slowpath_fmt+0x92/0xb0 kernel/panic.c:527
 [<ffffffff81339630>] ? __warn+0x1b0/0x1b0 kernel/panic.c:494
 [<ffffffff819183ba>] ? spin_unlock_irqrestore include/linux/spinlock.h:362 [inline]
 [<ffffffff819183ba>] ? kernfs_path_from_node+0x4a/0x60 fs/kernfs/dir.c:234
 [<ffffffff81922ccb>] sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30
 [<ffffffff81923561>] sysfs_do_create_link_sd.isra.2+0xd1/0xf0 fs/sysfs/symlink.c:51
 [<ffffffff819235c3>] sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 [<ffffffff819235c3>] sysfs_create_link+0x43/0xb0 fs/sysfs/symlink.c:92
 [<ffffffff83547c79>] device_add_class_symlinks drivers/base/core.c:891 [inline]
 [<ffffffff83547c79>] device_add+0x689/0x1360 drivers/base/core.c:1086
 [<ffffffff8167871d>] ? kfree_const+0x1d/0x20 mm/util.c:35
 [<ffffffff835475f0>] ? device_private_init+0x180/0x180 drivers/base/core.c:996
 [<ffffffff8167871d>] ? kfree_const+0x1d/0x20 mm/util.c:35
 [<ffffffff82c7c014>] ? kobject_set_name_vargs+0xb4/0x130 lib/kobject.c:285
 [<ffffffff83548cb8>] device_create_groups_vargs+0x1c8/0x220 drivers/base/core.c:1709
 [<ffffffff83548db8>] device_create_vargs drivers/base/core.c:1749 [inline]
 [<ffffffff83548db8>] device_create+0x88/0xa0 drivers/base/core.c:1785
 [<ffffffff83548d30>] ? device_create_vargs+0x20/0x20 drivers/base/core.c:1751
 [<ffffffff838e1680>] ? macvlan_set_mac_address+0x150/0x150 drivers/net/macvlan.c:697
 [<ffffffff838e6c74>] macvtap_device_event+0x1c4/0x2a0 drivers/net/macvtap.c:1298
 [<ffffffff8139f90b>] notifier_call_chain+0x8b/0x170 kernel/notifier.c:93
 [<ffffffff8139fa11>] __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 [<ffffffff8139fa11>] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401
 [<ffffffff84941897>] call_netdevice_notifiers_info+0x47/0x80 net/core/dev.c:1643
 [<ffffffff849675ea>] call_netdevice_notifiers net/core/dev.c:1659 [inline]
 [<ffffffff849675ea>] register_netdevice+0x88a/0xce0 net/core/dev.c:7027
 [<ffffffff84966d60>] ? netdev_change_features+0x80/0x80 net/core/dev.c:6801
 [<ffffffff849413ac>] ? dev_get_nest_level+0x10c/0x1a0 net/core/dev.c:5974
 [<ffffffff838df9c9>] macvlan_common_newlink+0x8b9/0x1090 drivers/net/macvlan.c:1316
 [<ffffffff838e582f>] macvtap_newlink+0xbf/0x110 drivers/net/macvtap.c:471
 [<ffffffff84b0c5b7>] ? __netlink_ns_capable+0xc7/0xf0 net/netlink/af_netlink.c:783
 [<ffffffff8499494b>] rtnl_newlink+0xd4b/0x1230 net/core/rtnetlink.c:2466
 [<ffffffff8498b23d>] ? rtnl_link_ops_get+0x5d/0x90 net/core/rtnetlink.c:284
 [<ffffffff84993f19>] ? rtnl_newlink+0x319/0x1230 net/core/rtnetlink.c:2322
 [<ffffffff84993c00>] ? rtnl_setlink+0x2f0/0x2f0 net/core/rtnetlink.c:2067
 [<ffffffff81478137>] ? debug_lockdep_rcu_enabled+0x77/0x90 kernel/rcu/update.c:261
 [<ffffffff81430065>] ? lookup_chain_cache kernel/locking/lockdep.c:2133 [inline]
 [<ffffffff81430065>] ? validate_chain kernel/locking/lockdep.c:2231 [inline]
 [<ffffffff81430065>] ? __lock_acquire+0x1985/0x5560 kernel/locking/lockdep.c:3329
 [<ffffffff8142e6e0>] ? debug_check_no_locks_freed+0x3c0/0x3c0 include/linux/sched.h:1954
 [<ffffffff84b0c5b7>] ? __netlink_ns_capable+0xc7/0xf0 net/netlink/af_netlink.c:783
 [<ffffffff8498fcf2>] rtnetlink_rcv_msg+0x222/0x680 net/core/rtnetlink.c:3513
 [<ffffffff8142dbdc>] ? __trace_hardirqs_on_caller kernel/locking/lockdep.c:2680 [inline]
 [<ffffffff8142dbdc>] ? trace_hardirqs_on_caller+0x44c/0x5e0 kernel/locking/lockdep.c:2727
 [<ffffffff8498fad0>] ? rtnetlink_rcv+0x30/0x30 net/core/rtnetlink.c:3521
 [<ffffffff85b92e48>] ? __mutex_lock_common kernel/locking/mutex.c:601 [inline]
 [<ffffffff85b92e48>] ? mutex_lock_nested+0x638/0xb30 kernel/locking/mutex.c:618
 [<ffffffff8498fab6>] ? rtnl_lock net/core/rtnetlink.c:70 [inline]
 [<ffffffff8498fab6>] ? rtnetlink_rcv+0x16/0x30 net/core/rtnetlink.c:3518
 [<ffffffff84b120a4>] ? rcu_read_lock include/linux/rcupdate.h:871 [inline]
 [<ffffffff84b120a4>] ? netlink_lookup+0xd4/0x630 net/netlink/af_netlink.c:457
 [<ffffffff84b198d2>] netlink_rcv_skb+0x242/0x350 net/netlink/af_netlink.c:2277
 [<ffffffff8498fad0>] ? rtnetlink_rcv+0x30/0x30 net/core/rtnetlink.c:3521
 [<ffffffff8498fac5>] rtnetlink_rcv+0x25/0x30 net/core/rtnetlink.c:3519
 [<ffffffff84b184d5>] netlink_unicast_kernel net/netlink/af_netlink.c:1214 [inline]
 [<ffffffff84b184d5>] netlink_unicast+0x455/0x660 net/netlink/af_netlink.c:1240
 [<ffffffff84b18435>] ? netlink_deliver_tap_kernel net/netlink/af_netlink.c:275 [inline]
 [<ffffffff84b18435>] ? netlink_unicast_kernel net/netlink/af_netlink.c:1213 [inline]
 [<ffffffff84b18435>] ? netlink_unicast+0x3b5/0x660 net/netlink/af_netlink.c:1240
 [<ffffffff84b18080>] ? netlink_attachskb+0x730/0x730 include/linux/sched.h:2918
 [<ffffffff84b18f73>] netlink_sendmsg+0x893/0xb40 net/netlink/af_netlink.c:1786
 [<ffffffff84b186e0>] ? netlink_unicast+0x660/0x660 include/net/sock.h:1975
 [<ffffffff816a8261>] ? __might_fault+0xf1/0x1b0 mm/memory.c:3876
 [<ffffffff84b186e0>] ? netlink_unicast+0x660/0x660 include/net/sock.h:1975
 [<ffffffff848f1815>] sock_sendmsg_nosec net/socket.c:612 [inline]
 [<ffffffff848f1815>] sock_sendmsg+0xb5/0xf0 net/socket.c:622
 [<ffffffff848f27e9>] SYSC_sendto+0x1c9/0x300 net/socket.c:1648
 [<ffffffff848f2620>] ? SYSC_connect+0x2a0/0x2a0 net/socket.c:1540
 [<ffffffff817f10a1>] ? rcu_read_unlock include/linux/rcupdate.h:922 [inline]
 [<ffffffff817f10a1>] ? mntput_no_expire+0xb1/0x600 fs/namespace.c:1095
 [<ffffffff817f10be>] ? rcu_lock_release include/linux/rcupdate.h:491 [inline]
 [<ffffffff817f10be>] ? rcu_read_unlock include/linux/rcupdate.h:926 [inline]
 [<ffffffff817f10be>] ? mntput_no_expire+0xce/0x600 fs/namespace.c:1095
 [<ffffffff817f0ff0>] ? mnt_get_count+0x1c0/0x1c0 fs/namespace.c:184
 [<ffffffff817f1642>] ? mntput+0x52/0x70 fs/namespace.c:1143
 [<ffffffff813aed81>] ? ___might_sleep+0x331/0x440 kernel/sched/core.c:7435
 [<ffffffff8142dbdc>] ? __trace_hardirqs_on_caller kernel/locking/lockdep.c:2680 [inline]
 [<ffffffff8142dbdc>] ? trace_hardirqs_on_caller+0x44c/0x5e0 kernel/locking/lockdep.c:2727
 [<ffffffff8100401b>] ? trace_hardirqs_on_thunk+0x1b/0x1d
 [<ffffffff848f4ad9>] SyS_sendto+0x9/0x10 net/socket.c:1616
 [<ffffffff85b9b640>] entry_SYSCALL_64_fastpath+0x23/0xc1
Kernel Offset: disabled