BUG: unable to handle kernel NULL pointer dereference at 00000000000000fd
IP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
PGD 1c7bce067 P4D 1c7bce067 PUD 1a948b067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4401 Comm: udevd Not tainted 4.16.0-rc7+ #372
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff8801aebf70a0 EFLAGS: 00010246
RAX: ffff8801d7976580 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea00075e5d80 RSI: ffffea000749231f RDI: 0000000000000282
RBP: ffff8801aebf70d8 R08: 1ffff10035d7ede2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff8801d7976580 R15: ffffffff88512760
FS:  00007f1d7e5317a0(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000fd CR3: 00000001c4290002 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0xca/0xe0 mm/kasan/kasan.c:537
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 slab_post_alloc_hook mm/slab.h:443 [inline]
 slab_alloc mm/slab.c:3380 [inline]
 kmem_cache_alloc+0x11b/0x760 mm/slab.c:3540
 dup_mmap kernel/fork.c:451 [inline]
 dup_mm kernel/fork.c:1233 [inline]
 copy_mm+0x8d7/0x131f kernel/fork.c:1287
 copy_process.part.38+0x1fc7/0x4bd0 kernel/fork.c:1793
 copy_process kernel/fork.c:1606 [inline]
 _do_fork+0x1f7/0xf70 kernel/fork.c:2087
 SYSC_clone kernel/fork.c:2194 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2188
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f1d7dc14f46
RSP: 002b:00007ffe82aaf410 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe82aaf410 RCX: 00007f1d7dc14f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe82aaf470 R08: 0000000000001131 R09: 0000000000001131
R10: 00007f1d7e531a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe82aaf430 R14: 0000000000000005 R15: 0000000000000005
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 60 27 51 88 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 fc 00 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: ffff8801aebf70a0
CR2: 00000000000000fd
---[ end trace d31501306078d773 ]---