INFO: task syz.6.340:9271 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.340       state:D stack:27488 pid:9271  tgid:9268  ppid:8891   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x899/0x1040
 down_write+0x1bc/0x200
 super_lock+0x289/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f19b999c799
RSP: 002b:00007f19ba794028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f19b9c15fa0 RCX: 00007f19b999c799
RDX: 000000003a736e6f RSI: 0000200000000100 RDI: ffffffff80000300
RBP: 00007f19b9a32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f19b9c16038 R14: 00007f19b9c15fa0 R15: 00007ffcac4b8ca8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e3e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5635:
 #0: ffff8881089c90a0 (&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 sshd/5793:
3 locks held by syz-executor/6350:
1 lock held by syz.6.340/9271:
 #0: ffff888170e1e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.3.471/10758:
 #0: ffff888170e1e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/10815:
 #0: ffff88802bf2e0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebec348 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/12589:
 #0: ffff88801b4a40e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebec348 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.6.689/12913:
 #0: ffff888170e1e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/13128:
5 locks held by syz.0.728/13131:

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

NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6350 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+0x50/0x2e0
Code: 8b 05 94 7f 7a 11 48 89 44 24 30 0f 1f 44 00 00 65 8b 05 97 7f 7a 11 83 f8 08 0f 83 77 01 00 00 89 c0 48 0f a3 05 00 fb 6f 0e <73> 0d e8 d9 29 09 00 84 c0 0f 84 bc 01 00 00 83 3d fa 2d 70 0e 00
RSP: 0018:ffffc900043673d0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888113eba0d0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888113eba140
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90004367574 R11: fffff5200086ceb0 R12: 0000000000000001
R13: ffff888113eba140 R14: 0000000000000000 R15: 0000000000000001
FS:  000055557b0b2500(0000) GS:ffff88818de5f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005583e8eb6598 CR3: 000000001fb12000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 down_read+0x47/0x2e0
 f2fs_get_node_info+0x12c/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: 0033:0x7f33b5d9d9d7
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:00007ffc7ea9cd68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f33b5e32050 RCX: 00007f33b5d9d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc7ea9ce20
RBP: 00007ffc7ea9ce20 R08: 00007ffc7ea9de20 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc7ea9deb0
R13: 00007f33b5e32050 R14: 000000000001b9b8 R15: 00007ffc7ea9def0
 </TASK>
