WARNING: CPU: 3 PID: 10020 at kernel/workqueue.c:4396 destroy_workqueue.cold+0x5/0x71 kernel/workqueue.c:4396 Modules linked in: CPU: 3 PID: 10020 Comm: syz-executor.1 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:destroy_workqueue.cold+0x5/0x71 kernel/workqueue.c:4396 Code: 00 90 4a 89 f7 f1 89 c6 e8 01 81 00 00 c6 44 24 37 01 e9 cf 47 9b f8 48 c7 c7 80 f1 00 8b e8 78 40 04 f9 eb c2 e8 d1 fc c2 f8 <0f> 0b 48 c7 c6 00 95 4a 89 48 c7 c7 40 90 4a 89 49 8d 96 60 01 00 RSP: 0018:ffffc90000d37ce0 EFLAGS: 00010093 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81486793 RDX: ffff888020a99980 RSI: ffffffff88ad194f RDI: 0000000000000005 RBP: 000000000000000f R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffe8ffaddaf400 R14: ffff8880158ed000 R15: 0000000000000000 FS: 0000000001c33940(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c009abf000 CR3: 00000000638d2000 CR4: 0000000000350ee0 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:1446 deactivate_locked_super+0x94/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x3a3/0x530 fs/namespace.c:1118 task_work_run+0xdd/0x190 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x17e/0x1a0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45eb57 Code: 8c be a0 fb ff 74 01 c3 31 ed 58 5f ff d0 48 89 c7 e8 ed d7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8d a0 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdbd9af908 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00000000004a99f5 RCX: 000000000045eb57 RDX: 00007ffdbd9af9da RSI: 0000000000000002 RDI: 00007ffdbd9af9d0 RBP: 00007ffdbd9af9d0 R08: 0000000001c34b13 R09: 000000000000000a R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ffdbd9b0a60 R13: 0000000001c34a60 R14: 00000000004a9a14 R15: 00000000ffffffff