INFO: task syz.1.280:7789 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.280       state:D stack:24384 pid:7789  tgid:7788  ppid:7314   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: 0033:0x7fc27cd9c799
RSP: 002b:00007fc27dcab028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fc27d015fa0 RCX: 00007fc27cd9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fc27ce32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc27d016038 R14: 00007fc27d015fa0 R15: 00007ffee20b39f8
 </TASK>
INFO: task syz.1.280:7790 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.280       state:D stack:28832 pid:7790  tgid:7788  ppid:7314   task_flags:0x400040 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: 0033:0x7fc27cd9c799
RSP: 002b:00007fc27dc8a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fc27d016090 RCX: 00007fc27cd9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fc27ce32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc27d016128 R14: 00007fc27d016090 R15: 00007ffee20b39f8
 </TASK>
INFO: task syz.0.289:7833 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.289       state:D stack:24960 pid:7833  tgid:7832  ppid:7479   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
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc32879c799
RSP: 002b:00007fc3296ef028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fc328a15fa0 RCX: 00007fc32879c799
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffff80000801
RBP: 00007fc328832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc328a16038 R14: 00007fc328a15fa0 R15: 00007ffda5d338f8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5632:
 #0: ffff8881001f60a0 (&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
2 locks held by syz-executor/5812:
2 locks held by syz-executor/5815:
3 locks held by syz-executor/6658:
2 locks held by syz-executor/6831:
1 lock held by syz.1.280/7789:
 #0: ffff8881129a00e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.280/7790:
 #0: ffff8881129a00e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.289/7833:
 #0: ffff8881129a00e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.338/8196:
 #0: ffff8881129a00e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.2.382/8427:
 #0: ffff88810b1cc0e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.5.387/8495:
 #0: ffff8881196f20e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/8661:
2 locks held by syz-executor/8685:
1 lock held by syz.7.528/9465:
 #0: ffff88810d70e0e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.534/9481:
 #0: ffff8881129a00e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/9487:
2 locks held by syz-executor/9621:
 #0: ffff88802e3fa0e0 (&type->s_umount_key#61){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by syz-executor/9634:
 #0: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770

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

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+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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8685 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_switch+0x7/0x130
Code: 20 c3 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 06 <48> 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74
RSP: 0018:ffffc9000400f480 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8ede3480 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffff8881194388d7 R09: 1ffff1102328711a
R10: dffffc0000000000 R11: ffffed102328711b R12: 1ffff92000801eaf
R13: ffff88810cecc000 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055555e256500(0000) GS:ffff8882a9459000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe44d3d3a8 CR3: 0000000024530000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 f2fs_get_node_info+0x5d4/0x1e30
 read_node_folio+0x221/0x410
 __get_node_folio+0x3cb/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: 0033:0x7f49fc39d9d7
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:00007ffe952653a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f49fc432050 RCX: 00007f49fc39d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe95265460
RBP: 00007ffe95265460 R08: 00007ffe95266460 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe952664f0
R13: 00007f49fc432050 R14: 0000000000041cdf R15: 00007ffe95266530
 </TASK>
