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Message-ID: <IA1PR07MB9830E72E8A3426B8151185BAABAF9@IA1PR07MB9830.namprd07.prod.outlook.com>
Date: Mon, 27 Feb 2023 06:23:02 +0000
From: Sanan Hasanov <sanan.hasanov@...ghts.ucf.edu>
To: "axboe@...nel.dk" <axboe@...nel.dk>,
"asml.silence@...il.com" <asml.silence@...il.com>,
"io-uring@...r.kernel.org" <io-uring@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "syzkaller@...glegroups.com" <syzkaller@...glegroups.com>,
"contact@...zz.com" <contact@...zz.com>
Subject: INFO: task hung in io_ring_exit_work
Good day, dear maintainers,
We found a bug using a modified kernel configuration file used by syzbot.
We enhanced the coverage of the configuration file using our tool, klocalizer.
Kernel Branch: 6.2.0-next-20230225
Kernel config: https://drive.google.com/file/d/1NS9N8rvftQ7BouImn2OVnC96qrNhAeuO/view?usp=share_link
C Reproducer: Unfortunately, there is no reproducer for this bug yet.
Thank you!
Best regards,
Sanan Hasanov
INFO: task kworker/u16:20:839 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:20 state:D stack:25504 pid:839 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:24:842 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:24 state:D stack:25472 pid:842 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:27:845 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:27 state:D stack:25120 pid:845 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:57:870 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:57 state:D stack:25120 pid:870 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:58:871 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:58 state:D stack:24624 pid:871 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:60:874 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:60 state:D stack:24784 pid:874 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:62:875 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:62 state:D stack:24864 pid:875 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:63:876 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:63 state:D stack:24272 pid:876 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:64:877 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:64 state:D stack:25008 pid:877 ppid:2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
schedule_timeout+0x26e/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5d0 kernel/sched/completion.c:106
io_ring_exit_work+0x543/0x13c0 io_uring/io_uring.c:3027
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
INFO: task kworker/u16:0:28836 blocked for more than 143 seconds.
Not tainted 6.2.0-next-20230225 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u16:0 state:D stack:25472 pid:28836 ppid:2 flags:0x00004000
Workqueue: loop2 loop_rootcg_workfn
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x24bc/0x5a60 kernel/sched/core.c:6622
schedule+0xe7/0x1b0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
folio_wait_bit_common+0x390/0x9b0 mm/filemap.c:1301
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:952 [inline]
folio_lock include/linux/pagemap.h:948 [inline]
__filemap_get_folio+0xb13/0xd20 mm/filemap.c:1936
shmem_get_folio_gfp+0x41e/0x1960 mm/shmem.c:1880
shmem_get_folio mm/shmem.c:2071 [inline]
shmem_file_read_iter+0x569/0xa50 mm/shmem.c:2748
call_read_iter include/linux/fs.h:1845 [inline]
do_iter_readv_writev+0x2df/0x3b0 fs/read_write.c:733
do_iter_read+0x2f2/0x750 fs/read_write.c:796
vfs_iter_read+0x74/0xa0 fs/read_write.c:838
lo_read_simple drivers/block/loop.c:290 [inline]
do_req_filebacked drivers/block/loop.c:500 [inline]
loop_handle_cmd drivers/block/loop.c:1879 [inline]
loop_process_work+0x15a8/0x2130 drivers/block/loop.c:1914
process_one_work+0x9ba/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf915f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2e/0xd90 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf912f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2e/0xd90 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/59:
#0: ffffffff8bf92140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
1 lock held by in:imklog/7366:
#0: ffff88811488a168 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 fs/file.c:1046
1 lock held by syz-fuzzer/7263:
2 locks held by kworker/u16:20/839:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90007487da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:24/842:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc900074b7da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:27/845:
#0:
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc900074e7da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:57/870:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc900076bfda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:58/871:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc900076cfda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:60/874:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc9000775fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:62/875:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc9000776fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:63/876:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc9000777fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:64/877:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc9000781fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:0/28836:
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff8880458e9938 ((wq_completion)loop2){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90009aa7da8 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by syz-executor.2/6115:
#0: ffff8881128c00e0 (&type->s_umount_key#73/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
#1: ffff8881128b5090 (&nilfs->ns_sem){++++}-{3:3}, at: init_nilfs+0x7d/0x1300 fs/nilfs2/the_nilfs.c:630
2 locks held by kworker/u16:1/6137:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a0fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:2/6138:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003887da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:3/6139:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a2fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:4/6140:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003677da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:5/6141:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003847da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:6/6142:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a3fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:7/6143:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a4fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:8/6144:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a5fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:9/6145:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a6fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:10/6146:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a7fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/u16:11/6147:
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888100081138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x868/0x1820 kernel/workqueue.c:2361
#1: ffffc90003a8fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x89c/0x1820 kernel/workqueue.c:2365
=============================================
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