INFO: task syz-executor:5994 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21256 pid:5994  tgid:5994  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __bch2_fs_stop+0x704/0x900
 generic_shutdown_super+0x135/0x2c0
 bch2_kill_sb+0x41/0x50
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82e7b8ff57
RSP: 002b:00007ffc458b8398 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f82e7b8ff57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc458b8450
RBP: 00007ffc458b8450 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc458b94e0
R13: 00007f82e7c11c2d R14: 000000000001f898 R15: 00007ffc458b9520
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
 #0: ffffffff8e1e3aa8 (wq_pool_mutex){+.+.}-{4:4}, at: pwq_release_workfn+0x3dc/0x870
1 lock held by khungtaskd/34:
 #0: ffffffff8e33d320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5676:
 #0: ffff88810f2830a0 (&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 syz-executor/5994:
 #0: ffff88811b6f80e0 (&type->s_umount_key#60){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
2 locks held by syz.4.1303/11932:
 #0: ffff88811ff340e0 (&type->s_umount_key#66/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930
 #1: 
ffffffff8e33d320 (rcu_read_lock){....}-{1:3}, at: btrfs_emit_options+0x6c0/0x4080
3 locks held by udevd/11952:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #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+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 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: 11931 Comm: syz.4.1303 Not tainted syzkaller #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:kasan_check_range+0xd/0x2c0
Code: ff ff ff eb e1 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 <53> b0 01 48 85 f6 0f 84 ba 01 00 00 4c 8d 04 37 49 39 f8 0f 82 82
RSP: 0018:ffffc90006d47508 EFLAGS: 00000246
RAX: ffffffff82134aa9 RBX: ffffea00043dcd30 RCX: ffffffff82134ac5
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00043dcd30
RBP: 0000000000000001 R08: ffffea00043dcd07 R09: 1ffffd400087b9a0
R10: dffffc0000000000 R11: fffff9400087b9a1 R12: dffffc0000000000
R13: ffffea00043dcd08 R14: 0000000000000000 R15: ffffea00043dcd00
FS:  0000555556df8500(0000) GS:ffff8880b83fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28a88d1020 CR3: 000000002901a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_remove_rmap_ptes+0x2f5/0xfa0
 unmap_page_range+0x1f7f/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x240/0xb40
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1592f8ec29
Code: Unable to access opcode bytes at 0x7f1592f8ebff.
RSP: 002b:00007ffdbf694788 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1592f8ec29
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffdbf6947ec R08: 00000003bf69487f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000001d7
R13: 00000000000927c0 R14: 0000000000044592 R15: 00007ffdbf694840
 </TASK>
