INFO: task syz.3.1356:14849 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1356      state:D stack:25128 pid:14849 tgid:14848 ppid:14652  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 super_lock+0x25c/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ee198ebe9
RSP: 002b:00007f2ee27e4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f2ee1bc5fa0 RCX: 00007f2ee198ebe9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffff80000302
RBP: 00007f2ee1a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000c000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ee1bc6038 R14: 00007f2ee1bc5fa0 R15: 00007ffd1a774d78
 </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/5680:
 #0: ffff88810810d0a0 (&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
2 locks held by syz-executor/9841:
 #0: ffff8880395740e0 (&type->s_umount_key#55){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffff88803df80278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900
1 lock held by syz.3.1356/14849:
 #0: ffff8880395740e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.5.1948/16711:
 #0: ffff8880395740e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
3 locks held by syz.9.2247/17616:

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

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: 6393 Comm: kworker/u10:5 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:lock_is_held_type+0x51/0x190
Code: f6 29 04 00 0f 84 fe 00 00 00 65 8b 05 08 f5 26 07 85 c0 0f 85 ef 00 00 00 65 4c 8b 2c 25 08 80 a0 92 41 83 bd ec 0a 00 00 00 <0f> 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04
RSP: 0018:ffffc90002f7f920 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 94962b65150ef601
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888136639f98
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005eff1c R12: ffff888136639f80
R13: ffff888106d38000 R14: ffff88813663adf0 R15: ffff88813663adf0
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558f87a608 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 update_rq_clock+0x8f/0x5b0
 try_to_wake_up+0x70d/0x12b0
 kick_pool+0x47d/0x640
 process_scheduled_works+0x7a1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
