BUG: unable to handle kernel NULL pointer dereference at 00000000000000fc
PGD 1b5e11067 P4D 1b5e11067 PUD 1ba07a067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 18307 Comm: syz-executor1 Not tainted 4.16.0+ #293
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:ffff880198cef7f0 EFLAGS: 00010246
RAX: ffffffff899664e0 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea0000265980 RSI: ffffea000026599f RDI: 0000000000000282
RBP: ffff880198cef828 R08: 1ffff1003319decc R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff899664e0 R15: ffffffff88512aa0
FS:  0000000001730940(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000fc CR3: 00000001ad5d0000 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+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
 shmem_alloc_inode+0x1b/0x40 mm/shmem.c:3852
 alloc_inode+0x65/0x180 fs/inode.c:209
 new_inode_pseudo+0x69/0x190 fs/inode.c:890
 new_inode+0x1c/0x40 fs/inode.c:919
 shmem_get_inode+0xe1/0x930 mm/shmem.c:2166
 shmem_symlink+0xf0/0x920 mm/shmem.c:3233
 vfs_symlink+0x323/0x560 fs/namei.c:4116
 do_symlinkat+0x1d9/0x250 fs/namei.c:4143
 SYSC_symlink fs/namei.c:4162 [inline]
 SyS_symlink+0x22/0x30 fs/namei.c:4160
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455007
RSP: 002b:0000000000a3eab8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00000000000005bb RCX: 0000000000455007
RDX: 0000000000000000 RSI: 00000000004ba64f RDI: 0000000000a3f7b0
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000001730940
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 a0 2a 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: ffff880198cef7f0
CR2: 00000000000000fc
---[ end trace 95f3d967bf26e2e4 ]---