------------[ cut here ]------------
WARNING: CPU: 1 PID: 9094 at kernel/workqueue.c:4344 destroy_workqueue+0x13f/0x5d0 kernel/workqueue.c:4344
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9094 Comm: syz-executor.1 Not tainted 5.4.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x86/0xca lib/dump_stack.c:113
 panic+0x2a1/0x52a kernel/panic.c:221
 __warn.cold.10+0x25/0x25 kernel/panic.c:582
 report_bug+0x1ad/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x125/0x1d0 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x2d/0x40 arch/x86/entry/entry_64.S:1028
RIP: 0010:destroy_workqueue+0x13f/0x5d0 kernel/workqueue.c:4344
Code: 00 0f 84 8d 00 00 00 49 8d 7e 18 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 74 08 3c 03 0f 8e 0e 04 00 00 41 83 7e 18 01 7e 6a <0f> 0b 48 8b 7d d0 e8 c6 36 ec 06 e8 51 f8 ff ff 48 83 c4 18 5b 41
RSP: 0018:ffff8880a5d27c00 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffe8ffffd70258 RCX: 0000000000000000
RDX: 000000000000000f RSI: 0000000000000000 RDI: ffffe8ffffd70218
RBP: ffff8880a5d27c40 R08: ffffed10173ea11d R09: ffffed10173ea11d
R10: ffffed10173ea11c R11: ffff8880b9f508e3 R12: ffff88809abcb800
R13: ffffed1013579720 R14: ffffe8ffffd70200 R15: dffffc0000000000
 reiserfs_put_super+0x201/0x520 fs/reiserfs/super.c:631
 generic_shutdown_super+0x12d/0x330 fs/super.c:462
 kill_block_super+0x96/0xe0 fs/super.c:1442
 reiserfs_kill_sb+0x171/0x1d0 fs/reiserfs/super.c:570
 deactivate_locked_super+0x77/0xd0 fs/super.c:335
 deactivate_super fs/super.c:366 [inline]
 deactivate_super+0x136/0x150 fs/super.c:362
 cleanup_mnt+0x1ee/0x3c0 fs/namespace.c:1102
 __cleanup_mnt+0xd/0x10 fs/namespace.c:1109
 task_work_run+0xf9/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x167/0x200 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x4a1/0x550 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x467a47
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc1435d9c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000467a47
RDX: 00007ffc1435da9b RSI: 0000000000000002 RDI: 00007ffc1435da90
RBP: 00007ffc1435da90 R08: 00000000ffffffff R09: 00007ffc1435d860
R10: 00000000020e58e3 R11: 0000000000000246 R12: 00000000004bee90
R13: 00007ffc1435eb60 R14: 00000000020e5810 R15: 00007ffc1435eba0
Kernel Offset: disabled
Rebooting in 86400 seconds..