INFO: task hung in unregister_netdevice

INFO: task hung in unregister_netdevice_notifier (3)
Status: upstream: reported on 2019/02/17 08:11
Reported-by: syzbot+0f1827363a305f74996f@syzkaller.appspotmail.com
First crash: 255d, last: 1d04h

similar bugs (2):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in unregister_netdevice_notifier (2)			1	267d	267d	12/13	fixed on 2018/10/11 14:33
upstream	INFO: task hung in unregister_netdevice_notifier			15	440d	447d	0/13	closed as invalid on 2018/05/03 10:16

Sample crash report:

INFO: task syz-executor.1:32467 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc6+ #69
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28224 32467  30279 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline]
 rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:72
 unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
 raw_release+0x57/0x6f0 net/can/raw.c:358
 __sock_release+0xd3/0x250 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1139
 __fput+0x2df/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411d41
Code: 00 00 8b b3 30 01 00 00 31 c0 bf d0 36 44 00 e8 05 f3 00 00 8b b3 08 01 00 00 31 c0 bf e4 36 44 00 e8 f3 f2 00 00 8b 83 e0 00 <00> 00 48 89 ee bf f9 36 44 00 85 c0 49 0f 44 f4 31 c0 e8 d8 f2 00
RSP: 002b:00007ffc0aec9520 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411d41
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: ffffffff8100a073 R09: 0000000021576e54
R10: 00007ffc0aec9450 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000072 R15: 0000000000000001
INFO: task syz-executor.5:32470 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc6+ #69
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28224 32470   7467 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline]
 rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:72
 unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
 raw_release+0x57/0x6f0 net/can/raw.c:358
 __sock_release+0xd3/0x250 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1139
 __fput+0x2df/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411d41
Code: 00 00 8b b3 30 01 00 00 31 c0 bf d0 36 44 00 e8 05 f3 00 00 8b b3 08 01 00 00 31 c0 bf e4 36 44 00 e8 f3 f2 00 00 8b 83 e0 00 <00> 00 48 89 ee bf f9 36 44 00 85 c0 49 0f 44 f4 31 c0 e8 d8 f2 00
RSP: 002b:00007ffe4f2857d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000411d41
RDX: 0000000000000000 RSI: 0000000000741140 RDI: 0000000000000007
RBP: 0000000000000000 R08: ffffffff8175450f R09: 0000000021576e54
R10: 00007ffe4f285700 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000001504 R15: 0000000000000005
INFO: task syz-executor.0:32475 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc6+ #69
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28224 32475  25857 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline]
 rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:72
 unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
 raw_release+0x57/0x6f0 net/can/raw.c:358
 __sock_release+0xd3/0x250 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1139
 __fput+0x2df/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411d41
Code: 00 00 8b b3 30 01 00 00 31 c0 bf d0 36 44 00 e8 05 f3 00 00 8b b3 08 01 00 00 31 c0 bf e4 36 44 00 e8 f3 f2 00 00 8b 83 e0 00 <00> 00 48 89 ee bf f9 36 44 00 85 c0 49 0f 44 f4 31 c0 e8 d8 f2 00
RSP: 002b:00007ffd315a7180 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411d41
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00000000c77ce9e8 R09: 00000000c77ce9ec
R10: 00007ffd315a70b0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000142 R15: 0000000000000000
INFO: task syz-executor.3:32481 blocked for more than 140 seconds.
kobject: 'batman_adv' (00000000eb158d40): kobject_uevent_env
kobject: 'batman_adv' (00000000eb158d40): kobject_uevent_env: filter function caused the event to drop!
      Not tainted 5.0.0-rc6+ #69
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29872 32481  25311 0x00000004
kobject: 'batman_adv' (00000000eb158d40): kobject_cleanup, parent           (null)
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
kobject: 'batman_adv' (00000000eb158d40): calling ktype release
kobject: (00000000eb158d40): dynamic_kobj_release
kobject: 'batman_adv': free name
 schedule+0x92/0x180 kernel/sched/core.c:3529
kobject: 'rx-0' (000000009425fba9): kobject_cleanup, parent 00000000b76440a4
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline]
 rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613
kobject: 'rx-0' (000000009425fba9): auto cleanup 'remove' event
kobject: 'rx-0' (000000009425fba9): kobject_uevent_env
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
kobject: 'rx-0' (000000009425fba9): kobject_uevent_env: uevent_suppress caused the event to drop!
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:72
kobject: 'rx-0' (000000009425fba9): auto cleanup kobject_del
 register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1634
kobject: 'rx-0' (000000009425fba9): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-3' (000000005fdfc520): kobject_cleanup, parent 00000000b76440a4
kobject: 'tx-3' (000000005fdfc520): auto cleanup 'remove' event
 raw_init+0x299/0x340 net/can/raw.c:343
kobject: 'tx-3' (000000005fdfc520): kobject_uevent_env
kobject: 'tx-3' (000000005fdfc520): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-3' (000000005fdfc520): auto cleanup kobject_del
kobject: 'tx-3' (000000005fdfc520): calling ktype release
kobject: 'tx-3': free name
kobject: 'tx-2' (00000000b08d97be): kobject_cleanup, parent 00000000b76440a4
kobject: 'tx-2' (00000000b08d97be): auto cleanup 'remove' event
 can_create+0x28a/0x4b0 net/can/af_can.c:183
 __sock_create+0x3e6/0x750 net/socket.c:1275
kobject: 'tx-2' (00000000b08d97be): kobject_uevent_env
kobject: 'tx-2' (00000000b08d97be): kobject_uevent_env: uevent_suppress caused the event to drop!
 sock_create net/socket.c:1315 [inline]
 __sys_socket+0x103/0x220 net/socket.c:1345
kobject: 'tx-2' (00000000b08d97be): auto cleanup kobject_del
kobject: 'tx-2' (00000000b08d97be): calling ktype release
kobject: 'tx-2': free name
kobject: 'tx-1' (00000000709a5639): kobject_cleanup, parent 00000000b76440a4
 __do_sys_socket net/socket.c:1354 [inline]
 __se_sys_socket net/socket.c:1352 [inline]
 __x64_sys_socket+0x73/0xb0 net/socket.c:1352
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'tx-1' (00000000709a5639): auto cleanup 'remove' event
RIP: 0033:0x457e39
Code: Bad RIP value.
RSP: 002b:00007ff564faac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
kobject: 'tx-1' (00000000709a5639): kobject_uevent_env
kobject: 'tx-1' (00000000709a5639): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-1' (00000000709a5639): auto cleanup kobject_del
kobject: 'tx-1' (00000000709a5639): calling ktype release
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39
kobject: 'tx-1': free name
kobject: 'tx-0' (00000000835508d8): kobject_cleanup, parent 00000000b76440a4
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
kobject: 'tx-0' (00000000835508d8): auto cleanup 'remove' event
kobject: 'tx-0' (00000000835508d8): kobject_uevent_env
kobject: 'tx-0' (00000000835508d8): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (00000000835508d8): auto cleanup kobject_del
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
kobject: 'tx-0' (00000000835508d8): calling ktype release
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff564fab6d4
kobject: 'tx-0': free name
R13: 00000000004c616d R14: 00000000004db2f0 R15: 00000000ffffffff
kobject: 'queues' (00000000b76440a4): kobject_cleanup, parent           (null)

Showing all locks held in the system:
1 lock held by khungtaskd/1039:
kobject: 'queues' (00000000b76440a4): calling ktype release
 #0: 00000000b60d248e (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389
kobject: 'queues' (00000000b76440a4): kset_release
1 lock held by udevd/3867:
kobject: 'queues': free name
2 locks held by getty/7415:
 #0: 00000000e88d5f59 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
kobject: 'wlan2130' (000000006fe942ce): kobject_uevent_env
 #1: 0000000019eb2138 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
kobject: 'wlan2130' (000000006fe942ce): kobject_uevent_env: uevent_suppress caused the event to drop!
2 locks held by getty/7416:
kobject: 'net' (00000000df13c95f): kobject_cleanup, parent           (null)
kobject: 'net' (00000000df13c95f): calling ktype release
kobject: 'net': free name
 #0: 000000005ade2a44 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000003c9b35b9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7417:
 #0: 00000000014d4db9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 0000000040737cf5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7418:
 #0: 00000000495d2925 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000008468a6ce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7419:
 #0: 000000000a1e8d17 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000000f0237e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7420:
 #0: 00000000fe409789 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000005a06b62c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7421:
 #0: 00000000ef5d25aa (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000effcff7b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by kworker/1:0/28948:
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 0000000036c9d838 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2144
 #1: 00000000fba37eaa ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2148
1 lock held by syz-executor.4/16551:
 #0: 000000008e9f7a44 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline]
 #0: 000000008e9f7a44 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750
5 locks held by kworker/u4:3/25989:
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 00000000e512596f ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2144
 #1: 00000000d6c01503 (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2148
 #2: 000000005ef07189 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:518
 #3: 00000000a64a1703 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
 #4: 000000007f9e135c (rcu_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
 #4: 000000007f9e135c (rcu_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited.constprop.0+0x42a/0x530 kernel/rcu/tree_exp.h:622
2 locks held by syz-executor.1/32467:
 #0: 0000000091604586 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline]
 #0: 0000000091604586 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x250 net/socket.c:578
 #1: 000000005ef07189 (pernet_ops_rwsem){++++}, at: unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
2 locks held by syz-executor.5/32470:
 #0: 00000000a53c9e1d (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline]
 #0: 00000000a53c9e1d (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x250 net/socket.c:578
 #1: 000000005ef07189 (pernet_ops_rwsem){++++}, at: unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
2 locks held by syz-executor.0/32475:
 #0: 000000005169c482 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline]
 #0: 000000005169c482 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x250 net/socket.c:578
 #1: 000000005ef07189 (pernet_ops_rwsem){++++}, at: unregister_netdevice_notifier+0x7e/0x3a0 net/core/dev.c:1703
1 lock held by syz-executor.3/32481:
 #0: 000000005ef07189 (pernet_ops_rwsem){++++}, at: register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1634
1 lock held by syz-executor.2/32495:
 #0: 000000005ef07189 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1ba/0x340 net/core/net_namespace.c:433

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc6+ #69
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x9df/0xee0 kernel/hung_task.c:287
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3867 Comm: udevd Not tainted 5.0.0-rc6+ #69
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pvclock_scale_delta arch/x86/include/asm/pvclock.h:68 [inline]
RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:85 [inline]
RIP: 0010:pvclock_clocksource_read+0x1b2/0x4d0 arch/x86/kernel/pvclock.c:87
Code: 89 d9 48 89 c2 48 8b 7d a8 4c 89 d6 f7 d9 48 d3 ea 44 89 d9 48 d3 e0 45 85 db 48 0f 48 c2 8b 53 18 83 e6 07 48 89 f9 48 f7 e2 <48> 0f ac d0 20 4c 89 d2 48 c1 e9 03 48 c1 ea 03 42 0f b6 0c 21 42
RSP: 0018:ffff888098037bb8 EFLAGS: 00000a07
RAX: 51a81ae58ed2e6ca RBX: ffffffff89997000 RCX: ffffffff89997017
RDX: 0000000000000287 RSI: 0000000000000000 RDI: ffffffff89997017
RBP: ffff888098037c40 R08: ffffffff8999701c R09: ffffffff89997008
R10: ffffffff89997010 R11: 00000000ffffffff R12: dffffc0000000000
R13: ffffffff89997003 R14: fffffbfff1332e01 R15: ffffffff8999701d
FS:  00007ff1ce5b57a0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c428a8f000 CR3: 0000000098cb6000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 kvm_clock_read+0x18/0x30 arch/x86/kernel/kvmclock.c:90
 kvm_clock_get_cycles+0x9/0x10 arch/x86/kernel/kvmclock.c:97
 tk_clock_read kernel/time/timekeeping.c:167 [inline]
 timekeeping_get_delta kernel/time/timekeeping.c:261 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:368 [inline]
 ktime_get_ts64+0x1b0/0x3f0 kernel/time/timekeeping.c:885
 ep_set_mstimeout fs/eventpoll.c:1726 [inline]
 ep_poll+0x36a/0xe50 fs/eventpoll.c:1759
 do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2216
 __do_sys_epoll_wait fs/eventpoll.c:2226 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2223 [inline]
 __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2223
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff1cdcc9943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007ffe9afc6838 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007ff1cdcc9943
RDX: 0000000000000008 RSI: 00007ffe9afc6930 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000001c4c770 R15: 0000000001c49250

All crashes (166):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
ci-upstream-kasan-gce-root	2019/02/12 03:32	upstream	aa0c38cf	65a0d619	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-root	2019/04/18 19:17	upstream	e53f31bf	b0e8efcb	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-smack-root	2019/04/15 06:48	upstream	dc4060a5	505ab413	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-root	2019/04/09 14:20	upstream	869e3305	995065ff	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-root	2019/04/07 13:42	upstream	faac51dd	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce	2019/03/26 01:37	upstream	8c2ffd91	55684ce1	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-selinux-root	2019/03/06 22:25	upstream	afe6fe70	18215b8d	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-386	2018/10/14 02:32	upstream	7ec21823	caf12900	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-kasan-gce-386	2018/12/06 02:27	upstream	d0897090	764b42c4	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/06/16 08:27	net	ef7bfa84	442206d7	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/05/04 14:00	net	93aa4792	d28f4ce5	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/05/02 18:14	net	4dd2b82d	e9039493	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/05/01 08:35	net	0e233874	618456b4	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/05/01 01:35	net	34259977	618456b4	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/29 10:56	net	21f1b8a6	b617407b	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/29 04:48	net	21f1b8a6	b617407b	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/07 16:19	net	6491d698	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/07 11:32	net	6491d698	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/07 08:44	net	6491d698	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/07 07:16	net	6491d698	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/06 23:04	net	7f46774c	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/06 19:46	net	7f46774c	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/06 08:29	net	7f46774c	fa763482	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/03 10:02	net	b2e54b09	dfd3394d	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/02 04:55	net	b506bc97	a9ca43d4	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/01 13:55	net	d3de85a5	ccf2355a	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/01 12:09	net	d3de85a5	ccf2355a	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/04/01 07:25	net	d3de85a5	ccf2355a	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/03/30 21:48	net	4d31c4fa	c35ee0ea	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-this-kasan-gce	2019/03/30 05:18	net	4d31c4fa	c35ee0ea	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/25 11:20	net-next	7d30a7f6	82c13b6b	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/23 14:15	net-next	92ad6325	3efccdd2	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/21 16:47	net-next	dca73a65	34bf9440	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/16 20:21	net-next	9d9f3fba	442206d7	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/09 01:46	net-next	8d94a873	0159583c	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/06/04 15:47	net-next	b7034146	e41a20c5	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-bpf-next-kasan-gce	2019/06/01 04:21	bpf-next	d168286d	53c81ea5	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-bpf-next-kasan-gce	2019/05/25 03:13	bpf-next	c87f60a7	85c57315	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/05/08 11:44	net-next	a55a385d	a7383bfa	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/05/04 09:41	net-next	8ef988b9	d28f4ce5	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/05/03 02:04	net-next	26f146ed	e9039493	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/27 05:42	net-next	148f025d	b617407b	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/27 02:50	net-next	148f025d	b617407b	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/23 07:47	net-next	be659b8d	53199d6e	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/22 02:37	net-next	4e54507a	b0e8efcb	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/19 19:36	net-next	5c2e6e14	b0e8efcb	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/17 16:43	net-next	a32b9d91	b0e8efcb	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/15 04:27	net-next	0ed1d3dd	505ab413	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/11 12:00	net-next	b8c7e2c3	e955ac50	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/09 16:53	net-next	7f301cff	995065ff	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/07 04:50	net-next	eb94dc9a	c34fde03	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/04/01 11:59	net-next	6578229d	ccf2355a	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/03/29 05:41	net-next	eda3d1b0	14c58f8d	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-net-kasan-gce	2019/03/29 01:00	net-next	eda3d1b0	14c58f8d	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-linux-next-kasan-gce-root	2019/06/21 14:07	linux-next	dc636f5d	34bf9440	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net
ci-upstream-linux-next-kasan-gce-root	2019/04/15 08:23	linux-next	bcb67f0f	505ab413	.config	log	report	davem@davemloft.net, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net