BUG: unable to handle kernel NULL pointer dereference at 00000000000000fc
PGD 1ae1ee067 P4D 1ae1ee067 PUD 1d4de5067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 6038 Comm: udevd Not tainted 4.16.0+ #17
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:ffff8801abb2fa58 EFLAGS: 00010246
RAX: ffff8801cb987180 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea00072e61c0 RSI: ffffffffffffffff RDI: 0000000000000282
RBP: ffff8801abb2fa90 R08: ffff8801d4ec2af8 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801cb987180 R15: ffffffff88b186e0
FS:  00007f0f077e57a0(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000fc CR3: 00000001d4e39000 CR4: 00000000001406f0
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+0x99/0xe0 mm/kasan/kasan.c:538
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 slab_post_alloc_hook mm/slab.h:444 [inline]
 slab_alloc mm/slab.c:3392 [inline]
 kmem_cache_alloc+0x11b/0x760 mm/slab.c:3552
 getname_flags+0xd0/0x5a0 fs/namei.c:140
 user_path_at_empty+0x2d/0x50 fs/namei.c:2555
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x121/0x1f0 fs/stat.c:185
 vfs_stat include/linux/fs.h:3072 [inline]
 SYSC_newstat+0x87/0xf0 fs/stat.c:337
 SyS_newstat+0x1d/0x30 fs/stat.c:333
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f0f06eecc65
RSP: 002b:00007ffdcb21d928 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000b2e250 RCX: 00007f0f06eecc65
RDX: 00007ffdcb21d940 RSI: 00007ffdcb21d940 RDI: 00007ffdcb21ddd0
RBP: 0000000000b47320 R08: 000000000041f4f1 R09: 00007f0f06f437d0
R10: 7269762f73656369 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000b47327 R14: 0000000000b2e250 R15: 000000000000000b
Code: 55 48 89 e5 41 57 49 c7 c7 e0 86 b1 88 41 56 41 55 41 54 49 89 f4 53 48 83 ec 10 48 89 7d c8 4d 89 e5 4d 85 e4 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: ffff8801abb2fa58
CR2: 00000000000000fc
---[ end trace fccf41f07ce121c7 ]---