INFO: task syz-executor:14379 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21800 pid:14379 tgid:14379 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: 0033:0x7f566578ff17
RSP: 002b:00007ffe2e583d78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f5665811c05 RCX: 00007f566578ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe2e583e30
RBP: 00007ffe2e583e30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe2e584ec0
R13: 00007f5665811c05 R14: 0000000000066700 R15: 00007ffe2e584f00
 </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/5675:
 #0: ffff8880298270a0 (&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
3 locks held by kworker/u8:2/5861:
3 locks held by kworker/1:7/8899:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000f737bc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff888118dd7240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
2 locks held by kworker/u9:8/9977:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
1 lock held by syz-executor/14379:
 #0: ffff888106fa00e0 (&type->s_umount_key#108){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.7.4074/18970:
 #0: ffff888106fa00e0 (&type->s_umount_key#108){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.4158/19203:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #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: 11423 Comm: syz-executor Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #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:check_preemption_disabled+0x45/0x120
Code: 0e 27 07 65 8b 0d bb 0e 27 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 9b 0e 27 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b <41> 5e 41 5f 5d e9 41 ca 02 00 cc 48 c7 04 24 00 00 00 00 9c 8f 04
RSP: 0018:ffffc9000311f798 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 3faff484c0cf2900
RDX: 0000000000000000 RSI: ffffffff8dba33c3 RDI: ffffffff8be32600
RBP: 00000000ffffffff R08: ffff88804b040003 R09: 1ffff11009608000
R10: dffffc0000000000 R11: ffffed1009608001 R12: 0000000000000246
R13: ffff88801fbf9cc0 R14: ffffffff8e139f40 R15: 1ffff11021313b85
FS:  000055558c5b6500(0000) GS:ffff8880b8624000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557354719e68 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_is_held_type+0xfe/0x190
 __might_resched+0xa6/0x610
 vfree+0x26d/0x400
 kcov_close+0x28/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52b63c14a5
Code: Unable to access opcode bytes at 0x7f52b63c147b.
RSP: 002b:00007ffcc7d5a2d0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00000000000007aa RCX: 00007f52b63c14a5
RDX: 00007ffcc7d5a310 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffcc7d5a37c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000008ae4e R15: 00007ffcc7d5a3d0
 </TASK>
