general protection fault in quarantine_remove_cache (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: d7e78d08 Linux 4.14.195
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1123cbde900000
kernel config: https://syzkaller.appspot.com/x/.config?x=6608b656f49b4e8c
dashboard link: https://syzkaller.appspot.com/bug?extid=7cb7febc9603f0a16ab3
compiler: gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7cb7fe...@syzkaller.appspotmail.com

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 59 Comm: kworker/u4:2 Not tainted 4.14.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff8880a9406140 task.stack: ffff8880a9408000
RIP: 0010:qlist_move_cache+0x67/0xd0 mm/kasan/quarantine.c:275
RSP: 0018:ffff8880a940fb38 EFLAGS: 00010006
RAX: ffff888095770440 RBX: ffff8880a940fb70 RCX: ffffea000000131f
RDX: 0000000000002100 RSI: ffff8880a940fb70 RDI: ffff888000108c00
RBP: ffff888094a57900 R08: ffffffff8a09fbb8 R09: 00000000000c00ce
R10: ffff8880a9406ab8 R11: ffff8880a9406140 R12: ffffea0000000000
R13: 0007700007700077 R14: ffffffff8a5bee20 R15: 0007700007700077
FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ecda27740 CR3: 00000000905b8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
quarantine_remove_cache+0x63/0xd0 mm/kasan/quarantine.c:317
shutdown_cache+0xe/0x1e0 mm/slab_common.c:540
kmem_cache_destroy+0x1d2/0x240 mm/slab_common.c:842
tipc_server_stop+0x13a/0x171 net/tipc/server.c:637
tipc_topsrv_stop net/tipc/subscr.c:390 [inline]
tipc_topsrv_exit_net+0x168/0x28a net/tipc/subscr.c:402
ops_exit_list+0xa5/0x150 net/core/net_namespace.c:142
cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 00 00 00 eb 22 49 83 3e 00 74 7d 49 8b 46 08 4c 89 28 4d 89 6e 08 49 c7 45 00 00 00 00 00 49 01 56 10 4d 85 ff 74 56 4d 89 fd <4d> 8b 3f 4c 89 ef e8 9e 89 a4 ff 48 c1 e8 0c 48 c1 e0 06 4c 01
RIP: qlist_move_cache+0x67/0xd0 mm/kasan/quarantine.c:275 RSP: ffff8880a940fb38
---[ end trace 6179e7f5cd5c8a3c ]---


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.