INFO: task syz-executor:28019 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:21608 pid:28019 tgid:28019 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: 0033:0x7f288dd8ff17
RSP: 002b:00007ffe12f0fae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f288de11c05 RCX: 00007f288dd8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe12f0fba0
RBP: 00007ffe12f0fba0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe12f10c30
R13: 00007f288de11c05 R14: 00000000000637d9 R15: 00007ffe12f10c70
 </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
3 locks held by kworker/u11:0/53:
 #0: ffff888111aeb148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900007bfbc0 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8881223d0dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1ac/0x680
1 lock held by klogd/5285:
2 locks held by getty/5675:
 #0: ffff88810eac80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by sshd/5796:
1 lock held by syz-executor/28019:
 #0: ffff8880319480e0 (&type->s_umount_key#100){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.8.4985/31619:
 #0: ffff8880319480e0 (&type->s_umount_key#100){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.4985/31622:
 #0: ffff8880319480e0 (&type->s_umount_key#100){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.4985/31624:
 #0: ffff8880319480e0 (&type->s_umount_key#100){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.5.5235/759:
2 locks held by syz.5.5502/1782:
2 locks held by syz.5.6722/6374:
1 lock held by syz.5.6935/7061:
 #0: ffff8880319480e0 (&type->s_umount_key#100){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.7030/8021:

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

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: 759 Comm: syz.5.5235 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:__lock_acquire+0x38b/0xd20
Code: 00 75 19 90 48 c7 c7 32 23 ba 8d 48 c7 c6 71 78 a9 8d e8 f8 e7 e5 ff 90 0f 0b 90 90 90 31 c0 48 8b 3c 24 0f b6 98 c4 00 00 00 <41> 8b 46 20 25 ff 1f 00 00 48 0f a3 05 44 21 0a 12 73 17 48 69 c0
RSP: 0018:ffffc90008556ca0 EFLAGS: 00000002
RAX: ffffffff9348b830 RBX: 0000000000000002 RCX: 0000000000000044
RDX: 0000000000080000 RSI: 0000000000000000 RDI: ffff88802ac81cc0
RBP: 0000000000000044 R08: 0000000000000000 R09: ffffffff81a70716
R10: dffffc0000000000 R11: fffffbfff1f46847 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88802ac827b0 R15: ffff88802ac827b0
FS:  00007f2dcea1f6c0(0000) GS:ffff8881a3c24000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056122fdc4e10 CR3: 000000010edee000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 rcu_note_context_switch+0x266/0x1140
 __schedule+0x35d/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:lock_acquire+0x12/0x360
Code: cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 60 <4d> 89 ce 45 89 c7 41 89 cc 89 54 24 04 89 f3 49 89 fd 48 8b ac 24
RSP: 0018:ffffc900085572f0 EFLAGS: 00000286
RAX: ffffffff81cea1f6 RBX: 00007f2dcdbc14a5 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e139ee0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90008557478 R11: ffffffff81ac3890 R12: ffff88802ac81cc0
R13: 1ffff920010aaf08 R14: 00007f2dcdbc14a5 R15: 1ffff920010aae8e
 is_bpf_text_address+0x47/0x2b0
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 free_pids+0x80/0x100
 release_task+0x131b/0x17f0
 do_exit+0x15f2/0x2300
 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: 0033:0x7f2dcdbc14a5
Code: Unable to access opcode bytes at 0x7f2dcdbc147b.
RSP: 002b:00007f2dcea1ef80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f2dcddb5fa0 RCX: 00007f2dcdbc14a5
RDX: 00007f2dcea1efc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2dcdc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f2dcddb6038 R14: 00007f2dcddb5fa0 R15: 00007ffcd049ea48
 </TASK>
