WARNING in reiserfs_put

WARNING in reiserfs_put_super
Status: upstream: reported on 2020/09/24 09:27
Reported-by: syzbot+fcdd69a8426baab36109@syzkaller.appspotmail.com
First crash: 160d, last: 8d23h

Sample crash report:

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WARNING: CPU: 0 PID: 8617 at kernel/workqueue.c:4406 destroy_workqueue.cold+0x5/0x71 kernel/workqueue.c:4406
Modules linked in:
CPU: 0 PID: 8617 Comm: syz-executor.5 Not tainted 5.11.0-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: 40 d4 6a 89 f7 f1 89 c6 e8 bb 89 00 00 c6 44 24 37 01 e9 89 68 8c f8 48 c7 c7 80 f1 c0 8b e8 d2 bf f7 f8 eb c2 e8 db d2 b4 f8 <0f> 0b 48 c7 c6 40 d9 6a 89 48 c7 c7 80 d4 6a 89 49 8d 96 60 01 00
RSP: 0018:ffffc90001ce7ce8 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
RDX: ffff88801308a280 RSI: ffffffff88be1945 RDI: 0000000000000003
RBP: 000000000000000f R08: 0000000000000001 R09: 0000000000000003
R10: ffffffff814a8843 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffe8ffffce6600 R14: ffff88802e8fa400 R15: 0000000000000000
FS:  0000000001d55400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000053edb8 CR3: 000000006dd8e000 CR4: 00000000001526f0
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:1393
 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: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:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x467477
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:00007ffcfcc04688 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000467477
RDX: 00007ffcfcc0475b RSI: 0000000000000002 RDI: 00007ffcfcc04750
RBP: 00007ffcfcc04750 R08: 00000000ffffffff R09: 00007ffcfcc04520
R10: 0000000001d568ab R11: 0000000000000246 R12: 00000000004bbe94
R13: 00007ffcfcc05820 R14: 0000000001d56810 R15: 00007ffcfcc05860

Crashes (10):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-selinux-root	2021/02/21 06:26	upstream	e767b353	3e5ed8b4	.config	log	report	info	WARNING in reiserfs_put_super
ci-qemu-upstream	2021/02/20 22:59	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	WARNING in reiserfs_put_super
ci-qemu-upstream	2020/12/04 19:08	upstream	e87297fa	20366b87	.config	log	report	info
ci-qemu-upstream	2020/11/27 21:06	upstream	99c710c4	5018c946	.config	log	report	info
ci-qemu-upstream	2020/11/26 15:51	upstream	fa02fcd9	5018c946	.config	log	report	info
ci-upstream-kasan-gce-selinux-root	2020/11/24 21:46	upstream	80145ac2	e34b696c	.config	log	report	info
ci-qemu-upstream	2020/11/13 23:35	upstream	9e6a39ea	1bf9a662	.config	log	report	info
ci-qemu-upstream	2020/11/02 07:36	upstream	3cea11cd	8bc4594f	.config	log	report	info
ci-qemu-upstream	2020/09/27 21:42	upstream	16bc1d54	5dd8aee8	.config	log	report	info
ci-upstream-kasan-gce-selinux-root	2020/09/22 15:51	upstream	98477740	3e8f6c27	.config	log	report	info