INFO: task syz.8.1343:18350 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1343      state:D stack:24696 pid:18350 tgid:18349 ppid:18014  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f483919cdd9
RSP: 002b:00007f4839fb0028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4839415fa0 RCX: 00007f483919cdd9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffff80000601
RBP: 00007f4839232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4839416038 R14: 00007f4839415fa0 R15: 00007ffca093d5c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
9 locks held by kworker/u9:5/1109:
2 locks held by getty/5443:
 #0: ffff88811511b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: 
ffffc900034732e8
 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
4 locks held by kworker/0:8/7125:
 #0: ffff88801db88540 ((wq_completion)xfs-sync/loop5){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90003b2fc40 ((work_completion)(&mp->m_flush_inodes_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff88810ebc20d8 (&type->s_umount_key#64){++++}-{4:4}, at: xfs_flush_inodes_worker+0x45/0x80
 #3: ffff88810a75a810 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x209/0xbf0
2 locks held by syz-executor/14098:
1 lock held by syz.8.1343/18350:
 #0: ffff8881136060d8 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.5.1879/22329:
 #0: ffff88811b14bf20 (&sb->s_type->i_mutex_key#28){++++}-{4:4}, at: xfs_ilock+0x109/0x380
2 locks held by syz.5.1879/22330:
 #0: ffff88810ebc2410 (sb_writers#17){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff88811b14bf20 (&sb->s_type->i_mutex_key#28){++++}-{4:4}, at: xfs_ilock+0xee/0x380
2 locks held by syz.5.1879/22351:
 #0: ffff88810ebc2410 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88802202ce20 (&inode->i_sb->s_type->i_mutex_dir_key/1){+.+.}-{4:4}, at: filename_create+0x200/0x370
1 lock held by syz.8.1881/22349:
 #0: ffff8881136060d8 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.0.1885/22368:
1 lock held by dhcpcd-run-hook/22369:

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

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+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 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: 22368 Comm: syz.0.1885 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_release+0x179/0x3c0
Code: 01 c8 05 00 00 e0 ff 81 c1 00 00 e0 ff 89 45 20 85 c9 0f 85 e6 00 00 00 45 89 af 88 0b 00 00 48 8b 45 00 49 89 87 80 0b 00 00 <41> 39 d5 0f 84 cb 00 00 00 41 ff c5 48 8d 4c 24 24 4c 89 ff 48 8b
RSP: 0018:ffffc9000b76f318 EFLAGS: 00000083
RAX: 962344cb4a277c0c RBX: 0000000000000002 RCX: 0000000080000001
RDX: 0000000000000002 RSI: ffffffff8e95cd60 RDI: ffff8881727f46e0
RBP: ffff8881727f46e0 R08: ffffffff9030b3f7 R09: 1ffffffff206167e
R10: dffffc0000000000 R11: fffffbfff206167f R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e95cd60 R15: ffff8881727f3b00
FS:  00007fc8f6c436c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055916a16a950 CR3: 00000001125ce000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 mod_memcg_lruvec_state+0x23a/0x270
 lru_gen_update_size+0x801/0xd10
 lru_gen_del_folio+0x31c/0x540
 __page_cache_release+0x5bd/0xd60
 folios_put_refs+0x775/0xb40
 shmem_undo_range+0x52c/0x1660
 shmem_evict_inode+0x289/0xae0
 evict+0x61e/0xb10
 __dentry_kill+0x1a2/0x690
 finish_dput+0xc9/0x480
 __fput+0x691/0xa60
 fput_close_sync+0x11f/0x240
 __x64_sys_close+0x7e/0x110
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc8f5d5d60e
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:00007fc8f6c42da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fc8f6c436c0 RCX: 00007fc8f5d5d60e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007fc8f6c42ee0 R14: 00007fc8f6c42ea0 R15: 00007fc8eba00000
 </TASK>
