INFO: task syz-executor:6062 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:18392 pid:6062  tgid:6062  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: 0033:0x7f884c58ff17
RSP: 002b:00007ffd2bbe2c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f884c611c05 RCX: 00007f884c58ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd2bbe2d40
RBP: 00007ffd2bbe2d40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd2bbe3dd0
R13: 00007f884c611c05 R14: 000000000003da8b R15: 00007ffd2bbe3e10
 </TASK>
INFO: task syz-executor:7247 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:18040 pid:7247  tgid:7247  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: 0033:0x7fd15f38ff17
RSP: 002b:00007ffd10e45b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd15f411c05 RCX: 00007fd15f38ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd10e45c50
RBP: 00007ffd10e45c50 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd10e46ce0
R13: 00007fd15f411c05 R14: 000000000003de4f R15: 00007ffd10e46d20
 </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
4 locks held by kworker/u9:9/1162:
2 locks held by getty/5675:
 #0: ffff888020bc50a0 (&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/6062:
 #0: ffff88810b7900e0 (&type->s_umount_key#119){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz-executor/7247:
 #0: ffff88803a0b40e0 (&type->s_umount_key#119){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.8.1985/11754:
 #0: ffff88810b7900e0 (&type->s_umount_key#119){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/11780:
 #0: ffffffff8e13f978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by syz.4.3256/15834:
3 locks held by cmp/15861:

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 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
Workqueue: bat_events batadv_nc_worker
RIP: 0010:batadv_nc_worker+0x211/0x610
Code: f6 eb b8 e8 61 85 79 f6 e8 8c 78 32 00 89 c3 31 ff 89 c6 e8 91 89 79 f6 85 db 74 15 e8 18 37 60 f6 84 c0 74 18 e8 3f 85 79 f6 <48> 8b 5c 24 08 eb 65 e8 33 85 79 f6 48 8b 5c 24 08 eb 59 e8 57 78
RSP: 0018:ffffc900000f7a20 EFLAGS: 00000293
RAX: ffffffff8b462671 RBX: 0000000000000001 RCX: ffff88801c2b5640
RDX: 0000000000000000 RSI: ffffffff8be325e0 RDI: ffffffff8be325a0
RBP: fffffffffffffe38 R08: 0000000000000000 R09: ffffffff8b462532
R10: dffffc0000000000 R11: ffffffff8b462460 R12: dffffc0000000000
R13: ffffffff8b462532 R14: ffff888020c50d80 R15: 00000000000001e4
FS:  0000000000000000(0000) GS:ffff8881a3c24000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7fd863d8 CR3: 000000010ec6e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
