INFO: task syz-executor:8749 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:21608 pid:8749  tgid:8749  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: 0033:0x7f65d6d8ff17
RSP: 002b:00007ffef9fbba88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f65d6e11c05 RCX: 00007f65d6d8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffef9fbbb40
RBP: 00007ffef9fbbb40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffef9fbcbd0
R13: 00007f65d6e11c05 R14: 000000000002c063 R15: 00007ffef9fbcc10
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/u10:2/68:
1 lock held by udevd/5296:
2 locks held by getty/5672:
 #0: ffff8881070ff0a0 (&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/8749:
 #0: ffff8880358180e0 (&type->s_umount_key#123){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.8.916/10008:
 #0: ffff8880358180e0 (&type->s_umount_key#123){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by udevd/10241:
1 lock held by syz-executor/10532:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.4.1064/10798:
 #0: ffff8880358180e0 (&type->s_umount_key#123){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.7.1182/11515:
 #0: ffff8880358180e0 (&type->s_umount_key#123){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10532 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:mark_lock+0x3e/0x190
Code: 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08 0f 45 da bd 01 00 00 00 89 d9 d3 e5 25 ff 1f 00 00 48 0f a3 05 44 b6 0a 12 73 10 <48> 69 c0 c8 00 00 00 48 8d 88 10 43 49 93 eb 48 83 3d ab 45 0e 18
RSP: 0018:ffffc90000007878 EFLAGS: 00000047
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000008
RDX: 0000000000000008 RSI: ffff88801fa7a850 RDI: ffff88801fa79cc0
RBP: 0000000000000100 R08: 0000000000000000 R09: ffffffff84d0432b
R10: ffffc90000007a98 R11: fffff52000000f55 R12: 0000000000000002
R13: 0000000000000002 R14: ffff88801fa7a850 R15: ffff88801fa7a870
FS:  000055556032d500(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffed4c17f98 CR3: 0000000128df4000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __lock_acquire+0x6a8/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 debug_object_activate+0xbb/0x420
 __mod_timer+0xa4f/0xf30
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vprintk_emit+0x58f/0x7a0
Code: 85 32 01 00 00 e8 11 87 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 00 87 1f 00 eb 06 e8 f9 86 1f 00 fb 48 c7 c7 c0 e1 12 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 35
RSP: 0018:ffffc90002f6f920 EFLAGS: 00000293
RAX: ffffffff81a02717 RBX: ffffffff81a025d4 RCX: ffff88801fa79cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e12e1c0
RBP: ffffc90002f6fa30 R08: ffffffff8fa39037 R09: 1ffffffff1f47206
R10: dffffc0000000000 R11: fffffbfff1f47207 R12: dffffc0000000000
R13: 1ffff920005edf28 R14: 0000000000000200 R15: 000000000000005a
 _printk+0xcf/0x120
 _btrfs_printk+0x562/0x5b0
 btrfs_put_super+0x113/0x1b0
 generic_shutdown_super+0x135/0x2c0
 kill_anon_super+0x3b/0x70
 btrfs_kill_super+0x41/0x50
 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: 0033:0x7febb078ff17
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff9354b008 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007febb0811c05 RCX: 00007febb078ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff9354b0c0
RBP: 00007fff9354b0c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff9354c150
R13: 00007febb0811c05 R14: 0000000000053d5a R15: 00007fff9354c190
 </TASK>
