INFO: task syz.1.361:9537 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.361       state:D stack:25128 pid:9537  tgid:9536  ppid:9172   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a1318eba9
RSP: 002b:00007f5a140c4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f5a133d5fa0 RCX: 00007f5a1318eba9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffff80000600
RBP: 00007f5a13211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a133d6038 R14: 00007f5a133d5fa0 R15: 00007fffc2433948
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/0:3/2297:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000ad67bc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88802e842240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
2 locks held by getty/5673:
 #0: ffff88810d8c60a0 (&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-executor/5823:
 #0: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
3 locks held by syz-executor/7076:
1 lock held by syz.1.361/9537:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.3.412/10235:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.490/10954:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.570/11826:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.1.570/11827:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.634/12560:
 #0: ffff8881125c60e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/12575:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730

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

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: 7076 Comm: syz-executor 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
RIP: 0010:__lock_acquire+0x66/0xd20
Code: 41 89 d6 8b 0d ab 4a 63 0c 85 c9 44 0f 44 c1 31 c9 48 3d 10 73 64 93 41 0f 45 c8 89 4c 24 0c 8b 0d 8f a1 0e 18 85 c9 0f 95 c0 <83> fe 08 0f 92 c2 08 c2 0f 84 55 01 00 00 44 89 cd 83 fe 01 48 89
RSP: 0018:ffffc90002a7f4f0 EFLAGS: 00000046
RAX: ffffffff99b02a00 RBX: ffffffff8e139f20 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888104fa3980
RBP: ffffffff81f6a26d R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90002a7f660 R11: fffff5200054fecf R12: 0000000000000002
R13: ffffffff8e139f20 R14: 0000000000000000 R15: 0000000000000000
FS:  000055556f84d500(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa744dff8 CR3: 0000000123ed4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360
 filemap_get_entry+0xc9/0x2f0
 __filemap_get_folio+0x68/0xaf0
 f2fs_grab_cache_folio+0x2b/0x380
 __get_node_folio+0x194/0x1410
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb6e/0x1df0
 kill_f2fs_super+0x2c3/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d12f8fed7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd957a8b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6d13011c05 RCX: 00007f6d12f8fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd957a8bf0
RBP: 00007ffd957a8bf0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd957a9c80
R13: 00007f6d13011c05 R14: 000000000001dbe3 R15: 00007ffd957a9cc0
 </TASK>
