INFO: task syz-executor:5838 blocked for more than 143 seconds.
      Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:18456 pid:5838  tgid:5838  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 v9fs_evict_inode+0x170/0x320
 evict+0x504/0x9c0
 __dentry_kill+0x209/0x660
 dput+0x19f/0x2b0
 shrink_dcache_for_umount+0xa0/0x170
 generic_shutdown_super+0x67/0x2c0
 kill_anon_super+0x3b/0x70
 v9fs_kill_super+0x4c/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: 0033:0x7f3329b8ff17
RSP: 002b:00007ffd71edf298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3329c11c05 RCX: 00007f3329b8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd71edf350
RBP: 00007ffd71edf350 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd71ee03e0
R13: 00007f3329c11c05 R14: 00000000000215c1 R15: 00007ffd71ee0420
 </TASK>

Showing all locks held in the system:
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/5671:
 #0: ffff88810960b0a0 (&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: ffff888122cda0e0 (&type->s_umount_key#91){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz-executor/11983:
1 lock held by syz.4.1087/12129:
 #0: ffff888122cda0e0 (&type->s_umount_key#91){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.3.1111/12406:
 #0: ffff888031ede0e0 (&type->s_umount_key#48/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
 #1: ffffffff8dfe1668 (wq_pool_mutex){+.+.}-{4:4}, at: __alloc_workqueue+0x9eb/0x1b70
2 locks held by udevadm/12413:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094-dirty #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: 3570 Comm: kworker/u9:5 Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: btrfs-endio-meta btrfs_end_bio_work
RIP: 0010:validate_chain+0x1907/0x2140
Code: 90 31 c0 48 8b 3c 24 48 83 c0 30 49 39 c7 0f 84 5a 01 00 00 49 8b 5f 10 41 8b 44 24 f8 25 ff 1f 00 00 48 0f a3 05 09 49 0a 12 <0f> 82 5a ff ff ff 83 3d 7c d8 0d 18 00 74 07 31 c0 e9 58 ff ff ff
RSP: 0018:ffffc9000a267048 EFLAGS: 00000007
RAX: 0000000000000896 RBX: ffffffff93490ba8 RCX: 0000000000000003
RDX: 0000000000030000 RSI: 0000000000000000 RDI: ffff88802610b980
RBP: 0000000000000003 R08: ffffc9000a267010 R09: 0000000000000020
R10: dffffc0000000000 R11: ffffffff819dcc60 R12: ffff88802610c4c0
R13: ffff88802610c470 R14: ffff88802610c538 R15: ffffffff962b8a98
FS:  0000000000000000(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf6ff55440 CR3: 000000003bf4a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 console_flush_all+0x690/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 _btrfs_printk+0x562/0x5b0
 btrfs_validate_extent_buffer+0xf7f/0x1ad0
 end_bbio_meta_read+0x108/0x1e0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
