INFO: task syz-executor:5853 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21832 pid:5853  tgid:5853  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: 0033:0x7f3a3b58ff17
RSP: 002b:00007ffc0959c0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3a3b611c05 RCX: 00007f3a3b58ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc0959c1b0
RBP: 00007ffc0959c1b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc0959d240
R13: 00007f3a3b611c05 R14: 000000000001e2f1 R15: 00007ffc0959d280
 </TASK>

Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a220 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5672:
 #0: ffff88811026c0a0 (&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/5853:
 #0: ffff888025af40e0 (&type->s_umount_key#99){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.5.1363/9897:
 #0: ffff888025af40e0 (&type->s_umount_key#99){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/10253:
 #0: ffffffff8e13fcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.7.1758/10976:
 #0: ffff888025af40e0 (&type->s_umount_key#99){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895-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: 5911 Comm: kworker/0:6 Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895-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: rcu_gp process_srcu
RIP: 0010:preempt_count_add+0xba/0x1a0
Code: 00 85 c0 74 09 31 db 31 ff e8 42 f0 0d 00 65 4c 8b 34 25 08 f0 9f 92 49 81 c6 e8 14 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 ec 1d 93 00 49 89 1e 5b 41 5e 41 5f e9 bf 7e eb
RSP: 0018:ffffc900040b78a0 EFLAGS: 00000246
RAX: 1ffff110060ad29d RBX: ffffffff8b777505 RCX: ffffffff99ab4300
RDX: 00000000000000c1 RSI: ffffffff8be32b60 RDI: ffffffff8b777505
RBP: 0000000000000000 R08: ffff888136641b57 R09: 1ffff11026cc836a
R10: dffffc0000000000 R11: ffffffff8b7774a0 R12: 000000000000dc69
R13: 0000000000000002 R14: ffff8880305694e8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8621000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555593dc0608 CR3: 0000000129042000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 delay_tsc+0x65/0xc0
 try_check_zero+0x5dd/0x670
 process_srcu+0x2c6/0x1410
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
