INFO: task syz.2.644:16154 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.644       state:D stack:24416 pid:16154 tgid:16151 ppid:15634  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x3a7/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09a399c799
RSP: 002b:00007f09a482d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f09a3c15fa0 RCX: 00007f09a399c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f09a3a32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09a3c16038 R14: 00007f09a3c15fa0 R15: 00007ffdbfec38e8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e75e3e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5636:
 #0: ffff8881714ee0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
3 locks held by kworker/1:8/7671:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9ea/0x1830
 #1: ffffc90003d17c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa25/0x1830
 #2: ffff8881720c0240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x202/0x3d0
3 locks held by syz-executor/10921:
2 locks held by syz-executor/11975:
1 lock held by syz.2.644/16154:
 #0: ffff88811808a0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.7.884/20474:
 #0: ffff88811808a0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
3 locks held by syz-executor/21159:
2 locks held by syz-executor/22534:
1 lock held by syz.1.982/22989:
 #0: ffff88811808a0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/23055:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11975 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:__sanitizer_cov_trace_pc+0x0/0x70
Code: 89 fb e8 23 00 00 00 48 8b 3d 04 47 55 0c 48 89 de 5b e9 63 98 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 28 67 56 11 65 8b 15 49 67 56
RSP: 0018:ffffc90004f17538 EFLAGS: 00000246
RAX: ffffea00043016c0 RBX: ffffffff8200b97a RCX: ffff8881b8921d40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90004f17618 R08: ffffea00043016f7 R09: 1ffffd40008602de
R10: dffffc0000000000 R11: fffff940008602df R12: 1ffff920009e2ea8
R13: dffffc0000000000 R14: ffffea00043016c0 R15: ffffc90004f17560
FS:  0000555587110500(0000) GS:ffff88818de5f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d2e1e92f8 CR3: 000000016adc0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_get_entry+0x21a/0x320
 __filemap_get_folio_mpol+0x6d/0xb00
 __get_node_folio+0x20f/0xe90
 f2fs_update_inode_page+0x83/0x2e0
 f2fs_write_checkpoint+0xbee/0x26a0
 kill_f2fs_super+0x314/0x720
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2aafd9d9d7
Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc556a0028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2aafe32050 RCX: 00007f2aafd9d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc556a00e0
RBP: 00007ffc556a00e0 R08: 00007ffc556a10e0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc556a1170
R13: 00007f2aafe32050 R14: 00000000000440c9 R15: 00007ffc556a11b0
 </TASK>
