INFO: task syz.5.557:11163 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.557       state:D stack:25344 pid:11163 tgid:11162 ppid:10763  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: 0033:0x7f4b1559c799
RSP: 002b:00007f4b163f1028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4b15815fa0 RCX: 00007f4b1559c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f4b15632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b15816038 R14: 00007f4b15815fa0 R15: 00007ffdd7808c28
 </TASK>
INFO: task syz.5.557:11166 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.557       state:D stack:27496 pid:11166 tgid:11162 ppid:10763  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: 0033:0x7f4b1559c799
RSP: 002b:00007f4b163d0028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4b15816090 RCX: 00007f4b1559c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f4b15632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b15816128 R14: 00007f4b15816090 R15: 00007ffdd7808c28
 </TASK>
INFO: task syz.5.557:11168 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.557       state:D stack:28096 pid:11168 tgid:11162 ppid:10763  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: 0033:0x7f4b1559c799
RSP: 002b:00007f4b163af028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4b15816180 RCX: 00007f4b1559c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f4b15632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b15816218 R14: 00007f4b15816180 R15: 00007ffdd7808c28
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5631:
 #0: ffff88810d00e0a0 (&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/7800:
3 locks held by syz-executor/8457:
2 locks held by syz-executor/10078:
1 lock held by syz.5.557/11163:
 #0: ffff8881ae1240e0 (&type->s_umount_key#71){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.5.557/11166:
 #0: ffff8881ae1240e0 (&type->s_umount_key#71){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.5.557/11168:
 #0: ffff8881ae1240e0 (&type->s_umount_key#71){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.9.815/13062:
 #0: ffff8881ae1240e0 (&type->s_umount_key#71){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.7.910/14040:

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

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: 10078 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:xas_load+0x467/0x5b0
Code: 83 f6 e9 e7 fe ff ff 41 83 e7 3f e8 f3 93 19 f6 eb 05 e8 ec 93 19 f6 4c 8b 64 24 38 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 <48> 8b 1c 24 0f 85 da 00 00 00 45 88 3c 24 48 8b 44 24 20 42 0f b6
RSP: 0018:ffffc90007acf4b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888102bd9d40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffff88816d7b02c0 R08: ffffffff8200b1aa R09: ffffffff8e75e520
R10: ffffc90007acf580 R11: fffff52000f59eb3 R12: ffffc90007acf572
R13: dffffc0000000000 R14: ffffea000072ebc0 R15: 000000000000000e
FS:  0000555559123500(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3ed01a CR3: 000000001ffda000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_get_entry+0x185/0x320
 __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: 0033:0x7fc9a839d9d7
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:00007ffd5bd10928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc9a8432050 RCX: 00007fc9a839d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd5bd109e0
RBP: 00007ffd5bd109e0 R08: 00007ffd5bd119e0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd5bd11a70
R13: 00007fc9a8432050 R14: 000000000003535b R15: 00007ffd5bd11ab0
 </TASK>
