overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: 'file0' not a directory
overlayfs: filesystem on './bus' not supported as upperdir
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: 1 PID: 9375 Comm: kworker/u4:6 Not tainted 4.14.229-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff888045b72080 task.stack: ffff888045bb0000
RIP: 0010:qlist_move_cache+0x67/0xd0 mm/kasan/quarantine.c:275
RSP: 0018:ffff888045bb7b38 EFLAGS: 00010006
RAX: ffff888092c6c680 RBX: ffff888045bb7b70 RCX: ffffea0000005d9f
RDX: 0000000000001100 RSI: ffff888045bb7b70 RDI: ffff888000178d40
RBP: ffff8880af965900 R08: ffffffff8b9a4360 R09: 00000000000c00ca
R10: ffff888045b729f8 R11: ffff888045b72080 R12: ffffea0000000000
R13: 0007070007070700 R14: ffffffff8bed1900 R15: 0007070007070700
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000008e6a000 CR4: 00000000001406e0
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/0x180 net/tipc/server.c:637
 tipc_topsrv_stop net/tipc/subscr.c:390 [inline]
 tipc_topsrv_exit_net+0x168/0x290 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 2e 2e a6 ff 48 c1 e8 0c 48 c1 e0 06 4c 01 
RIP: qlist_move_cache+0x67/0xd0 mm/kasan/quarantine.c:275 RSP: ffff888045bb7b38
---[ end trace 8baac15ca3853df3 ]---