INFO: task syz-executor:5838 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:17768 pid:5838  tgid:5838  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 __filemap_get_folio+0x139/0xaf0
 truncate_inode_pages_range+0x3ed/0xda0
 evict+0x517/0x9c0
 evict_inodes+0x64c/0x6d0
 generic_shutdown_super+0x9a/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab4918ff17
RSP: 002b:00007ffd530bfb88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fab49211c05 RCX: 00007fab4918ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd530bfc40
RBP: 00007ffd530bfc40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd530c0cd0
R13: 00007fab49211c05 R14: 0000000000021a51 R15: 00007ffd530c0d10
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5670:
 #0: ffff888020f6b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz-executor/5838:
 #0: ffff88803af920e0 (&type->s_umount_key#124){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
3 locks held by syz-executor/9209:
1 lock held by syz.1.649/10615:
 #0: ffff88803af920e0 (&type->s_umount_key#124){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.772/11809:
2 locks held by syz.7.774/11815:
 #0: ffff888020e0c0e0 (&type->s_umount_key#51/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
 #1: ffff8881000e0188 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x2c2/0x520
1 lock held by udevadm/11826:
 #0: ffff8881000e0188 (&root->kernfs_rwsem){++++}-{4:4}, at: tomoyo_path_perm+0x1e3/0x4b0
3 locks held by rm/11846:

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 3 Comm: pool_workqueue_ 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:_find_next_bit+0x11/0xe0
Code: fd eb ce 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 89 f3 <48> 39 f2 0f 83 b8 00 00 00 49 89 d6 49 c7 c7 ff ff ff ff 44 89 f1
RSP: 0000:ffffc90000067b88 EFLAGS: 00000003
RAX: 0000000000006d33 RBX: 0000000000100000 RCX: 000000000017e328
RDX: 0000000000006d34 RSI: 0000000000100000 RDI: ffffffff96299830
RBP: ffff88802be57939 R08: 0000000000000000 R09: ffffffff81aa8268
R10: dffffc0000000000 R11: fffffbfff1f47147 R12: ffffffff96437b58
R13: 000000000000064f R14: 0000000000000000 R15: 0000000000006d34
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd72e8dad20 CR3: 000000010cc16000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 zap_class+0x1f0/0x360
 lockdep_unregister_key+0x1a6/0x310
 pwq_release_workfn+0x6d5/0x870
 kthread_worker_fn+0x507/0xb60
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
