------------[ cut here ]------------ WARNING: CPU: 0 PID: 8424 at kernel/workqueue.c:4406 destroy_workqueue.cold+0x5/0x71 kernel/workqueue.c:4406 Modules linked in: CPU: 0 PID: 8424 Comm: syz-executor.1 Not tainted 5.12.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:destroy_workqueue.cold+0x5/0x71 kernel/workqueue.c:4406 Code: e0 a3 6a 89 f7 f1 89 c6 e8 ee 8b 00 00 c6 44 24 37 01 e9 c8 34 85 f8 48 c7 c7 80 f1 c0 8b e8 11 2e f1 f8 eb c2 e8 5a 12 ae f8 <0f> 0b 48 c7 c6 e0 a8 6a 89 48 c7 c7 20 a4 6a 89 49 8d 96 60 01 00 RSP: 0018:ffffc90001a57ce8 EFLAGS: 00010093 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff888038f9c240 RSI: ffffffff88c51056 RDI: 0000000000000003 RBP: 000000000000000f R08: 0000000000000001 R09: 0000000000000003 R10: ffffffff814a4b93 R11: 0000000000084087 R12: dffffc0000000000 R13: ffffe8ffffccb200 R14: ffff888013c00400 R15: 0000000000000000 FS: 00000000032dd400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002d2a848 CR3: 0000000039023000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_put_super+0x234/0x5c0 fs/reiserfs/super.c:631 generic_shutdown_super+0x144/0x370 fs/super.c:464 kill_block_super+0x97/0xf0 fs/super.c:1394 deactivate_locked_super+0x94/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x3a3/0x530 fs/namespace.c:1136 task_work_run+0xdd/0x1a0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x249/0x250 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4678b7 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:00007fff8daa61c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004678b7 RDX: 00007fff8daa629b RSI: 0000000000000002 RDI: 00007fff8daa6290 RBP: 00007fff8daa6290 R08: 00000000ffffffff R09: 00007fff8daa6060 R10: 00000000032de8e3 R11: 0000000000000246 R12: 00000000004bebb2 R13: 00007fff8daa7360 R14: 00000000032de810 R15: 00007fff8daa73a0