kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 2376 Comm: udevd Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:virt_to_head_page include/linux/mm.h:622 [inline]
RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:127 [inline]
RIP: 0010:qlist_free_all+0x12b/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff8801cadcfaf0 EFLAGS: 00010207
RAX: 6f7267637a79732f RBX: 0000000000000282 RCX: ffffea0000000000
RDX: 01bdb57d8de9e5c0 RSI: ffff8801cadc4a38 RDI: 0000000000000282
RBP: ffff8801cadcfb28 R08: ffff8801cadc4a38 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 6f7267637a79732f R15: ffffffff88b172a0
FS:  00007f9d7b5e57a0(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d7b5ec000 CR3: 00000001cb3c2000 CR4: 00000000001406e0
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+0x99/0xe0 mm/kasan/kasan.c:537
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3542
 getname_flags+0xd0/0x5a0 fs/namei.c:138
 user_path_at_empty+0x2d/0x50 fs/namei.c:2569
 do_readlinkat+0x143/0x3e0 fs/stat.c:394
 SYSC_readlink fs/stat.c:427 [inline]
 SyS_readlink+0x2a/0x40 fs/stat.c:424
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f9d7acee577
RSP: 002b:00007ffde5944ba8 EFLAGS: 00000202 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00000000013a3250 RCX: 00007f9d7acee577
RDX: 00000000000003fc RSI: 00007ffde5944fd4 RDI: 00007ffde5944bd0
RBP: 00000000000003fc R08: 00000000013a30d0 R09: 00007f9d7ad431d0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 00000000013ad3d0 R15: 00000000013a3250
Code: 00 00 00 80 48 01 c2 72 43 48 b9 00 00 00 80 ff 77 00 00 48 01 ca 48 b9 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 ca <48> 8b 4a 20 48 8d 71 ff 83 e1 01 48 0f 45 d6 4c 8b 6a 30 e9 f4 
RIP: virt_to_head_page include/linux/mm.h:622 [inline] RSP: ffff8801cadcfaf0
RIP: qlink_to_cache mm/kasan/quarantine.c:127 [inline] RSP: ffff8801cadcfaf0
RIP: qlist_free_all+0x12b/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801cadcfaf0
BUG: unable to handle kernel NULL pointer dereference at 00000000000000fd
---[ end trace cc4d617af7624f3c ]---
PGD 1a2853067 P4D 1a2853067 PUD 1a2854067 PMD 0