INFO: task kworker/u4:1:24 blocked for more than 143 seconds.
      Not tainted 5.11.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D stack:24888 pid:   24 ppid:     2 flags:0x00004000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5078
 schedule+0xcf/0x270 kernel/sched/core.c:5157
 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1854
 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_park+0x122/0x1b0 kernel/kthread.c:582
 io_sq_thread_park fs/io_uring.c:7462 [inline]
 io_sq_thread_park fs/io_uring.c:7456 [inline]
 io_sq_thread_stop+0xfe/0x570 fs/io_uring.c:7480
 io_finish_async fs/io_uring.c:7498 [inline]
 io_ring_ctx_free fs/io_uring.c:8663 [inline]
 io_ring_exit_work+0x62/0x6d0 fs/io_uring.c:8756
 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Showing all locks held in the system:
3 locks held by kworker/u4:1/24:
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246
 #1: ffffc90000e07da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250
 #2: ffff888014419470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7461 [inline]
 #2: ffff888014419470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7456 [inline]
 #2: ffff888014419470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_stop+0xd6/0x570 fs/io_uring.c:7480
3 locks held by kworker/u4:2/27:
1 lock held by khungtaskd/1648:
 #0: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259
2 locks held by in:imklog/8148:
 #0: ffff888022448b70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947
 #1: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: rq_lock kernel/sched/sched.h:1320 [inline]
 #1: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: ttwu_queue kernel/sched/core.c:3188 [inline]
 #1: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: try_to_wake_up+0x5e6/0x14a0 kernel/sched/core.c:3468
2 locks held by agetty/8390:
 #0: ffff888011217098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266
 #1: ffffc900010302e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2155
2 locks held by kworker/u4:5/11142:

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

NMI backtrace for cpu 0
CPU: 0 PID: 1648 Comm: khungtaskd Not tainted 5.11.0-rc5-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:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd43/0xfa0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 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: 4879 Comm: systemd-journal Not tainted 5.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memcpy+0x20/0x60 mm/kasan/shadow.c:64
Code: 5d c3 0f 1f 84 00 00 00 00 00 41 55 49 89 fd 41 54 49 89 d4 31 d2 55 48 8b 4c 24 18 48 89 f5 4c 89 e6 48 89 ef e8 c0 f6 ff ff <84> c0 74 2c 48 8b 4c 24 18 ba 01 00 00 00 4c 89 e6 4c 89 ef e8 a7
RSP: 0018:ffffc90001677970 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff920002cef35 RCX: ffffffff838529a3
RDX: ffffed1003b8b079 RSI: 0000000000000014 RDI: ffff88801dc583b4
RBP: ffff88801dc583b4 R08: 0000000000000000 R09: ffff88801dc583c7
R10: ffffed1003b8b078 R11: 0000000000000008 R12: 0000000000000014
R13: ffffc90001677ab8 R14: 0000000000000005 R15: 0000000000000008
FS:  00007fe1e29e58c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1dff9e000 CR3: 0000000013cd4000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy include/linux/string.h:447 [inline]
 avc_has_perm_noaudit+0x153/0x390 security/selinux/avc.c:1156
 selinux_inode_permission+0x3ff/0x670 security/selinux/hooks.c:3057
 security_inode_permission+0x92/0xf0 security/security.c:1260
 inode_permission.part.0+0x113/0x410 fs/namei.c:471
 inode_permission fs/namei.c:444 [inline]
 may_lookup fs/namei.c:1569 [inline]
 link_path_walk.part.0+0x23d/0xc70 fs/namei.c:2128
 link_path_walk fs/namei.c:2112 [inline]
 path_lookupat+0xb7/0x830 fs/namei.c:2335
 filename_lookup+0x19f/0x560 fs/namei.c:2369
 user_path_at include/linux/namei.h:59 [inline]
 do_faccessat+0x129/0x820 fs/open.c:423
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fe1e1ca19c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdd3dcdf98 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffdd3dd0eb0 RCX: 00007fe1e1ca19c7
RDX: 00007fe1e2712a00 RSI: 0000000000000000 RDI: 0000556001bf09a3
RBP: 00007ffdd3dcdfd0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffdd3dd0eb0 R15: 00007ffdd3dce4c0