PF_BRIDGE: br_mdb_parse() with non-bridge
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 1c455d067 P4D 1c455d067 PUD 19ebcb067 PMD 0 
Oops: 0010 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 20764 Comm: syz-executor5 Not tainted 4.14.0-rc5-next-20171018+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d6274440 task.stack: ffff8801c28c0000
RIP: 0010:          (null)
RSP: 0018:ffff8801c28c7040 EFLAGS: 00010246
RAX: 1ffffffff0a25101 RBX: ffffea0006c87d40 RCX: ffffffff81882775
RDX: 0000000000010000 RSI: ffffea0006c87d40 RDI: ffff8801c8451540
RBP: ffff8801c28c7508 R08: ffff8801d9ec21c0 R09: ffffea0006c87d60
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffed0038518e7c R14: ffff8801c28c74e0 R15: ffffffff85128800
FS:  00007f6cdee3e700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001d8042000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __do_fault+0xeb/0x30f mm/memory.c:3196
 do_read_fault mm/memory.c:3606 [inline]
 do_fault mm/memory.c:3706 [inline]
 handle_pte_fault mm/memory.c:3936 [inline]
 __handle_mm_fault+0x1b9b/0x39c0 mm/memory.c:4060
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
 __do_page_fault+0x5bd/0xd60 arch/x86/mm/fault.c:1438
 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1514
 page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1066
RIP: 0010:__get_user_4+0x1b/0x30 arch/x86/lib/getuser.S:69
RSP: 0018:ffff8801c28c7be8 EFLAGS: 00010287
RAX: 00007f6cdedfc003 RBX: 1ffff10038518f7f RCX: ffffffff81974ef8
RDX: ffff8801d6274440 RSI: ffffc9000286f000 RDI: 0000000000000282
RBP: ffff8801c28c7cc0 R08: 0000000000000001 R09: 1ffff10038518f5a
R10: ffff8801c28c7a98 R11: 0000000000000000 R12: ffff8801c2196380
R13: 00007f6cdedfc000 R14: ffff8801c28c7c98 R15: dffffc0000000000
 do_io_submit+0x176/0x14f0 fs/aio.c:1656
 SYSC_io_submit fs/aio.c:1707 [inline]
 SyS_io_submit+0x27/0x30 fs/aio.c:1704
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f6cdee3dbe8 EFLAGS: 00000212 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000020203000 RSI: 0000000000000002 RDI: 00007f6cdedfc000
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b7550
R13: 00007f6cdee3db58 R14: 00000000004b7560 R15: 0000000000000000
Code:  Bad RIP value.
RIP:           (null) RSP: ffff8801c28c7040
CR2: 0000000000000000
---[ end trace 933a72034266540f ]---