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: 0 PID: 1224 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:virt_to_head_page include/linux/mm.h:615 [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:ffff8801cc527a48 EFLAGS: 00010207
RAX: dead4ead00000000 RBX: 0000000000000282 RCX: ffffea0000000000
RDX: 037aa11ab4000000 RSI: ffff8801af558da0 RDI: 0000000000000282
RBP: ffff8801cc527a80 R08: 1ffff100398a4f17 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dead4ead00000000 R15: ffffffff87acabe0
FS:  0000000000c22940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000402010 CR3: 00000001d1d83002 CR4: 00000000001606f0
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: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
 __split_vma+0x10b/0x7b0 mm/mmap.c:2564
 split_vma+0x8f/0xc0 mm/mmap.c:2627
 mprotect_fixup+0x3f5/0x640 mm/mprotect.c:359
 do_mprotect_pkey+0x57d/0x900 mm/mprotect.c:497
 SYSC_mprotect mm/mprotect.c:522 [inline]
 SyS_mprotect+0x2a/0x40 mm/mprotect.c:519
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4549b7
RSP: 002b:00007fff5ede6618 EFLAGS: 00000246 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00000000004549b7
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f47ad8de000
RBP: 00007fff5ede6700 R08: 00000000007038c0 R09: 00000000007038c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff5ede6710
R13: 00007f47ad8fe700 R14: 00007f47ad8fe9c0 R15: 0000000000000000
Code: 00 00 00 80 48 01 c2 72 44 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:615 [inline] RSP: ffff8801cc527a48
RIP: qlink_to_cache mm/kasan/quarantine.c:127 [inline] RSP: ffff8801cc527a48
RIP: qlist_free_all+0x12b/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801cc527a48
---[ end trace c23685ad17a9ded2 ]---