BUG: unable to handle kernel NULL pointer dereference at 0000000055969d77
IP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
PGD 1d00a8067 P4D 1d00a8067 PUD 1d026d067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1593 Comm: udevd Not tainted 4.15.0-rc2+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 0000000067b16b0d task.stack: 000000008a925200
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff8801d03b7770 EFLAGS: 00010246
RAX: ffff880100200088 RBX: 0000000000000286 RCX: 0000000000000000
RDX: ffffea0004008000 RSI: ffffea000400801f RDI: 0000000000000286
RBP: ffff8801d03b77a8 R08: ffffffff85fd4958 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff880100200088 R15: ffffffff85ecb440
FS:  00007f9dfe46c7a0(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000104 CR3: 00000001d0277000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0xca/0xe0 mm/kasan/kasan.c:536
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc_node mm/slab.c:3328 [inline]
 kmem_cache_alloc_node+0x131/0x760 mm/slab.c:3635
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1144 [inline]
 netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1836
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x7f9dfdb80320
RSP: 002b:00007ffe3b65c2e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000ba8480 RCX: 00007f9dfdb80320
RDX: 0000000000000000 RSI: 00007ffe3b65c330 RDI: 0000000000000004
RBP: 0000000000b8c8c0 R08: 0000000000000000 R09: 00007f9dfdbc8a60
R10: 736563697665642f R11: 0000000000000246 R12: 000000000000000b
R13: 0000000000000000 R14: 0000000000ba8480 R15: 0000000000b79030
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 40 b4 ec 85 53 49 89 f4 48 83 ec 10 48 89 7d c8 4d 85 e4 4d 89 e5 0f 84 c8 00 00 00 <49> 63 95 04 01 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f 
RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801d03b7770
CR2: 0000000000000104
---[ end trace 7393fd41598393cd ]---