XFS (loop2): Ending clean mount
syz-executor.3 (11057) used greatest stack depth: 22984 bytes left
XFS (loop3): Unmounting Filesystem
XFS (loop2): Unmounting Filesystem
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8034 at kernel/workqueue.c:4138 destroy_workqueue+0x1d3/0x710 kernel/workqueue.c:4138
Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 0 PID: 8034 Comm: syz-executor.3 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x21d/0x451 kernel/panic.c:247
 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
 __warn+0xdf/0x1e0 kernel/panic.c:603
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:destroy_workqueue+0x1d3/0x710 kernel/workqueue.c:4138
RSP: 0018:ffff8880901cfd20 EFLAGS: 00010297
RAX: ffff888091cce440 RBX: ffff8880a9945580 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000282
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000040031
R10: ffff888091ccecf0 R11: ffff888091cce440 R12: ffffe8ffffd97858
R13: ffffe8ffffd97800 R14: ffff8880a99455a0 R15: ffffe8ffffd97828
 xfs_destroy_mount_workqueues+0x119/0x1c0 fs/xfs/xfs_super.c:932
 xfs_fs_put_super+0xc4/0x130 fs/xfs/xfs_super.c:1747
 generic_shutdown_super+0x144/0x370 fs/super.c:446
 kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f9782677567
RSP: 002b:00007ffca655b8b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9782677567
RDX: 00007ffca655b98a RSI: 000000000000000a RDI: 00007ffca655b980
RBP: 00007ffca655b980 R08: 00000000ffffffff R09: 00007ffca655b750
R10: 00005555569c6873 R11: 0000000000000246 R12: 00007f97826d0b24
R13: 00007ffca655ca40 R14: 00005555569c6810 R15: 00007ffca655ca80
Kernel Offset: disabled
Rebooting in 86400 seconds..