INFO: task syz.3.527:10223 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.527       state:D stack:24608 pid:10223 tgid:10222 ppid:9965   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: 0033:0x7fea45d9c799
RSP: 002b:00007fea46c1f028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fea46015fa0 RCX: 00007fea45d9c799
RDX: 0000000000000000 RSI: 0000200000000180 RDI: ffffffff80000302
RBP: 00007fea45e32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea46016038 R14: 00007fea46015fa0 R15: 00007fff6493f828
 </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/5632:
 #0: ffff8881757210a0 (&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/1:4/5859:
2 locks held by syz-executor/6390:
2 locks held by syz-executor/6687:
3 locks held by syz-executor/7870:
1 lock held by syz.3.527/10223:
 #0: ffff8881114220e0 (&type->s_umount_key#63){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.5.766/12044:
 #0: ffff8881114220e0 (&type->s_umount_key#63){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by udevd/12324:
1 lock held by syz.1.831/12330:
 #0: ffff8881bafce0e0 (&type->s_umount_key#63){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.847/12445:
 #0: ffff88811d7ba0e0 (&type->s_umount_key#63){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.873/12669:

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

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: 12669 Comm: syz.4.873 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:lruvec_stat_mod_folio+0x1d4/0x4b0
Code: e8 c1 bf f7 ff 4d 8b 26 49 83 c4 48 4d 8d ac 24 58 06 00 00 4d 89 ee 49 c1 ee 03 41 80 3c 2e 00 74 08 4c 89 ef e8 9c bf f7 ff <4d> 39 7d 00 0f 85 85 01 00 00 41 80 3c 2e 00 74 08 4c 89 ef e8 83
RSP: 0018:ffffc90007a4f458 EFLAGS: 00000046
RAX: 1ffff110377be190 RBX: ffffffff82383190 RCX: 0000000080000003
RDX: 00000000ea663f89 RSI: ffffffff8c27b9e0 RDI: ffffffff8c27b9a0
RBP: dffffc0000000000 R08: ffffffff82383190 R09: ffffffff8e75e3e0
R10: dffffc0000000000 R11: fffff94000ccb091 R12: ffff888160495dc8
R13: ffff888160496420 R14: 1ffff1102c092c84 R15: ffff88823fff7400
FS:  00007efeada5e6c0(0000) GS:ffff8882a945f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efeacb86340 CR3: 000000011073a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_unaccount_folio+0x2d4/0x790
 __filemap_remove_folio+0xc5/0x530
 filemap_remove_folio+0xe6/0x1f0
 truncate_inode_folio+0x5d/0x70
 shmem_undo_range+0x42f/0x1660
 shmem_evict_inode+0x289/0xae0
 evict+0x61e/0xb10
 __dentry_kill+0x1a2/0x5e0
 finish_dput+0xc9/0x480
 __fput+0x691/0xa70
 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: 0033:0x7efeacb5cfce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007efeada5ddf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007efeada5e6c0 RCX: 00007efeacb5cfce
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00007efeada5dea0 R14: 000000000000621a R15: 0000200000000200
 </TASK>
