INFO: task rcu_gp:3 blocked for more than 143 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:rcu_gp state:D stack:29416 pid: 3 ppid: 2 flags:0x00004000
Workqueue: 0x0 (rcu_gp)
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5157
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103
worker_detach_from_pool+0x47/0x310 kernel/workqueue.c:1881
rescuer_thread+0x709/0xd30 kernel/workqueue.c:2566
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/0:0:5 blocked for more than 143 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:28864 pid: 5 ppid: 2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
wq_unregister_lockdep kernel/workqueue.c:3464 [inline]
pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3696
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/0:1:7 blocked for more than 143 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:26752 pid: 7 ppid: 2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
wq_unregister_lockdep kernel/workqueue.c:3464 [inline]
pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3696
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/u4:1:21 blocked for more than 143 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1 state:D stack:24848 pid: 21 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1847
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
__synchronize_srcu+0x132/0x220 kernel/rcu/srcutree.c:924
fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:836
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/u4:3:111 blocked for more than 144 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3 state:D stack:23600 pid: 111 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1847
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
__synchronize_srcu+0x132/0x220 kernel/rcu/srcutree.c:924
fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:164
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task khugepaged:1663 blocked for more than 144 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28456 pid: 1663 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1847
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
__flush_work+0x51f/0xac0 kernel/workqueue.c:3049
lru_add_drain_all+0x41c/0x6f0 mm/swap.c:850
khugepaged_do_scan mm/khugepaged.c:2190 [inline]
khugepaged+0x10b/0x6870 mm/khugepaged.c:2251
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/0:2:3000 blocked for more than 144 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:24520 pid: 3000 ppid: 2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
wq_unregister_lockdep kernel/workqueue.c:3464 [inline]
pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3696
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task wg-crypt-wg1:8899 blocked for more than 144 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:wg-crypt-wg1 state:D stack:28744 pid: 8899 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1847
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
affine_move_task+0x401/0x910 kernel/sched/core.c:2261
__set_cpus_allowed_ptr+0x2d2/0x3a0 kernel/sched/core.c:2353
worker_attach_to_pool+0x7c/0x290 kernel/workqueue.c:1852
rescuer_thread+0x3af/0xd30 kernel/workqueue.c:2506
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/0:3:9369 blocked for more than 144 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3 state:D stack:24848 pid: 9369 ppid: 2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
wq_unregister_lockdep kernel/workqueue.c:3464 [inline]
pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3696
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/0:4:9400 blocked for more than 145 seconds.
Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4 state:D stack:24520 pid: 9400 ppid: 2 flags:0x00004000
Workqueue: events pwq_unbound_release_workfn
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
wq_unregister_lockdep kernel/workqueue.c:3464 [inline]
pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3696
process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task syz-executor.4:18136 can't die for more than 145 seconds.
task:syz-executor.4 state:D stack:26992 pid:18136 ppid: 10957 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1847
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
kthread_stop+0x17a/0x720 kernel/kthread.c:596
destroy_workqueue+0x103/0x760 kernel/workqueue.c:4384
__btrfs_destroy_workqueue fs/btrfs/async-thread.c:370 [inline]
btrfs_destroy_workqueue+0x12b/0x600 fs/btrfs/async-thread.c:381
btrfs_stop_all_workers+0x232/0x2fe fs/btrfs/disk-io.c:1975
open_ctree+0x3ec5/0x3fec fs/btrfs/disk-io.c:3457
btrfs_fill_super fs/btrfs/super.c:1348 [inline]
btrfs_mount_root.cold+0x14/0x165 fs/btrfs/super.c:1717
legacy_get_tree+0x105/0x220 fs/fs_context.c:592
vfs_get_tree+0x89/0x2f0 fs/super.c:1549
fc_mount fs/namespace.c:983 [inline]
vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1013
vfs_kern_mount+0x3c/0x60 fs/namespace.c:1000
btrfs_mount+0x234/0xa20 fs/btrfs/super.c:1777
legacy_get_tree+0x105/0x220 fs/fs_context.c:592
vfs_get_tree+0x89/0x2f0 fs/super.c:1549
do_new_mount fs/namespace.c:2896 [inline]
path_mount+0x12ae/0x1e70 fs/namespace.c:3227
do_mount fs/namespace.c:3240 [inline]
__do_sys_mount fs/namespace.c:3448 [inline]
__se_sys_mount fs/namespace.c:3425 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3425
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x46090a
Code: Unable to access opcode bytes at RIP 0x4608e0.
RSP: 002b:00007f6efcd76a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6efcd76b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6efcd76ae0
RBP: 00007f6efcd76ae0 R08: 00007f6efcd76b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020001100
INFO: task syz-executor.1:18132 can't die for more than 145 seconds.
task:syz-executor.1 state:D stack:27712 pid:18132 ppid: 8503 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4269 [inline]
__schedule+0x890/0x2030 kernel/sched/core.c:5019
schedule+0xcf/0x270 kernel/sched/core.c:5098
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x59d/0x610 kernel/rcu/tree_exp.h:836
synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3690
synchronize_net+0x47/0x50 net/core/dev.c:10598
packet_release+0x977/0xc90 net/packet/af_packet.c:3086
__sock_release+0xcd/0x280 net/socket.c:596
sock_close+0x18/0x20 net/socket.c:1277
__fput+0x283/0x920 fs/file_table.c:280
task_work_run+0xdd/0x190 kernel/task_work.c:140
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:199
syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:274
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x417811
Code: Unable to access opcode bytes at RIP 0x4177e7.
RSP: 002b:00007ffcc5de9bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000417811
RDX: 0000000000000000 RSI: 0000000000000162 RDI: 0000000000000007
RBP: 0000000000000001 R08: 00000000a21de15f R09: 00000000a21de163
R10: 00007ffcc5de9cb0 R11: 0000000000000293 R12: 000000000118c9a0
R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118c07c
Showing all locks held in the system:
1 lock held by rcu_gp/3:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x47/0x310 kernel/workqueue.c:1881
2 locks held by kworker/0:0/5:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90000ca7da8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
2 locks held by kworker/0:1/7:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90000cc7da8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
1 lock held by kworker/u4:0/8:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x27/0x290 kernel/workqueue.c:1846
2 locks held by kworker/u4:1/21:
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90000dbfda8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
2 locks held by kworker/u4:2/27:
2 locks held by kworker/u4:3/111:
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc9000127fda8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
1 lock held by khungtaskd/1656:
#0: ffffffff8b339ce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6252
1 lock held by khugepaged/1663:
#0: ffffffff8b409408 (lock#5){+.+.}-{3:3}, at: lru_add_drain_all+0x5f/0x6f0 mm/swap.c:801
2 locks held by kworker/0:2/3000:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90001b87da8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
1 lock held by bat_events/4824:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x27/0x290 kernel/workqueue.c:1846
1 lock held by in:imklog/8186:
#0: ffff888011cb2ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932
1 lock held by kworker/u5:1/8514:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:2340 [inline]
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_thread+0x8ee/0x1120 kernel/workqueue.c:2374
1 lock held by wg-crypt-wg1/8899:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x27/0x290 kernel/workqueue.c:1846
2 locks held by kworker/0:3/9369:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc900039dfda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
2 locks held by kworker/0:4/9400:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90009bafda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
2 locks held by kworker/0:5/9929:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc9000171fda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
3 locks held by kworker/0:6/9931:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90001c77da8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
#2: ffffffff8b342428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8b342428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x27e/0x610 kernel/rcu/tree_exp.h:836
3 locks held by kworker/0:7/9932:
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
#1: ffffc90001befda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
#2: ffffffff8b342428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8b342428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x27e/0x610 kernel/rcu/tree_exp.h:836
1 lock held by syz-executor.4/18136:
#0: ffff88807297a0e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x201/0xaf0 fs/super.c:229
1 lock held by syz-executor.1/18132:
#0: ffff88802fa94c90 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline]
#0: ffff88802fa94c90 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:595
1 lock held by btrfs-flush_del/18148:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:2340 [inline]
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0x978/0xd30 kernel/workqueue.c:2575
1 lock held by kworker/0:8/18170:
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:2340 [inline]
#0: ffffffff8b204b88 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_thread+0x58/0x1120 kernel/workqueue.c:2366
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1656 Comm: khungtaskd Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline]
watchdog+0xd89/0xf30 kernel/hung_task.c:338
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4895 Comm: systemd-journal Not tainted 5.10.0-rc3-next-20201113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:197
Code: 8b 48 89 54 24 08 48 89 34 24 e8 e2 0f 60 02 48 8b 54 24 08 48 8b 34 24 e9 a1 fd ff ff 0f 1f 40 00 65 48 8b 14 25 00 f0 01 00 <65> 8b 05 90 5b 91 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74
RSP: 0018:ffffc9000162fea8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920002c5ff9
RDX: ffff888011f14f80 RSI: 00007ffe83712100 RDI: 0000000000000009
RBP: 0000000000000009 R08: 0000000000000000 R09: ffff888010fdd817
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920002c5fd6
R13: 00007ffe83712100 R14: dffffc0000000000 R15: 0000000000002000
FS: 00007f6bad4ea8c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6baaa5f000 CR3: 0000000026022000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fdget_pos include/linux/file.h:75 [inline]
ksys_read+0x67/0x250 fs/read_write.c:625
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f6baca7a210
Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24
RSP: 002b:00007ffe83711888 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007ffe83714300 RCX: 00007f6baca7a210
RDX: 0000000000002000 RSI: 00007ffe83712100 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000008 R09: 00005558d47b97b8
R10: 00005558d47b9780 R11: 0000000000000246 R12: 00007ffe83712100
R13: 00007ffe83714258 R14: 00005558d438b958 R15: 0005b3fb1f3509b3