INFO: task syz.4.23781:26129 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.23781     state:D stack:25032 pid:26129 tgid:26128 ppid:18665  task_flags:0x400548 flags:0x00024002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_for_completion+0x2bf/0x5d0
 io_wq_put_and_exit+0x316/0x650
 io_uring_clean_tctx+0x11f/0x1a0
 io_uring_cancel_generic+0x6ca/0x7d0
 do_exit+0x345/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa04e38ebe9
RSP: 002b:00007fa04f223038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000008000 RBX: 00007fa04e5c5fa0 RCX: 00007fa04e38ebe9
RDX: 0000000000000000 RSI: 00000000000847ba RDI: 000000000000000f
RBP: 00007fa04e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa04e5c6038 R14: 00007fa04e5c5fa0 R15: 00007ffdeacfd7a8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5677:
 #0: ffff8881094040a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz.1.8392/15309:
3 locks held by kworker/u9:62/30089:
1 lock held by iou-wrk-26129/26133:
1 lock held by syz.6.24647/30026:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
3 locks held by syz.7.24651/30046:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24648 Comm: kworker/u10:25 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x83/0x90
Code: 8d 52 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 01 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 <e9> 88 f9 bc 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900079d7938 EFLAGS: 00000293
RAX: ffffffff896b61c7 RBX: 00000000000000c6 RCX: 0000000000000000
RDX: ffff888108d81cc0 RSI: 000000000000002e RDI: 0000000000000000
RBP: 000000000000002e R08: ffff888108d81cc0 R09: 0000000000000003
R10: 000000000000002e R11: 0000000000000000 R12: 0000000000000003
R13: ffff88811dfac480 R14: ffffffff8c329dc0 R15: 000000000000002e
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001680 CR3: 0000000036eac000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 in_aton+0xe7/0x440
 nsim_dev_trap_report_work+0x50d/0xb80
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
