audit: type=1326 audit(1512975662.093:1718): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15801 comm="syz-executor1" exe="/root/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0xffff0000
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 1bea76067 P4D 1bea76067 PUD 1c4866067 PMD 0 
Oops: 0010 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 15762 Comm: syz-executor5 Not tainted 4.15.0-rc3+ #217
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
RSP: 0018:ffff8801bde6f050 EFLAGS: 00010246
RAX: 1ffffffff0a66f59 RBX: ffffea0006901780 RCX: ffffffff818a758b
RDX: 0000000000010000 RSI: ffffea0006901780 RDI: ffff8801d3591500
RBP: ffff8801bde6f510 R08: 1ffff10037bcdd17 R09: ffffea00069017a0
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff85337ac0 R14: ffff8801bf3e5788 R15: ffffed0037bcde7d
FS:  00007f2370e25700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001c497c000 CR4: 00000000001406f0
DR0: 0000000020001010 DR1: 0000000000000000 DR2: 0000000000000008
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __do_fault+0xeb/0x319 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+0x1e9e/0x3e20 mm/memory.c:4060
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429
 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504
 page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094
RIP: 0010:__get_user_4+0x1b/0x30 arch/x86/lib/getuser.S:70
RSP: 0018:ffff8801bde6fbe8 EFLAGS: 00010287
RAX: 00007f2370de3003 RBX: 1ffff10037bcdf7f RCX: ffffffff8199d458
RDX: ffff8801c0aae380 RSI: ffffc900025b8000 RDI: 0000000000000282
RBP: ffff8801bde6fcc0 R08: ffff8801db51f480 R09: 1ffff10037bcdf52
R10: ffff8801c0aae380 R11: 0000000000000000 R12: ffff8801d51f6dc0
R13: 00007f2370de3000 R14: ffff8801bde6fc98 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/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f2370e24c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f2370e24aa0 RCX: 0000000000452a39
RDX: 000000002063dff0 RSI: 0000000000000001 RDI: 00007f2370de3000
RBP: 00007f2370e24a90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b75fb
R13: 00007f2370e24bc8 R14: 00000000004b75fb R15: 0000000000000000
Code:  Bad RIP value.
RIP:           (null) RSP: ffff8801bde6f050
CR2: 0000000000000000
---[ end trace bcf9ec0b6e238058 ]---