==================================================================
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 1cb92d067 P4D 1cb92d067 PUD 1cbf4f067 PMD 0 
Oops: 0010 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3152 Comm: syzkaller342511 Not tainted 4.15.0-rc1-mm1+ #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 000000002a3073e3 task.stack: 000000009e1cbbb3
RIP: 0010:          (null)
RSP: 0018:ffff8801cb827818 EFLAGS: 00010286
RAX: ffff8801cba77b40 RBX: 1ffff10039704f04 RCX: ffffffff823afbad
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8801cb827820
RBP: ffff8801cb8279c0 R08: 0000000000000000 R09: ffff8801cb09a910
R10: 0000000000000008 R11: ffffed0039613529 R12: ffff8801cae86b18
R13: ffff8801cba77b68 R14: ffff8801cb827820 R15: dffffc0000000000
FS:  000000000199f880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001d58d3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sock_recvmsg_nosec net/socket.c:805 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:812
 sock_read_iter+0x361/0x560 net/socket.c:889
 call_read_iter include/linux/fs.h:1766 [inline]
 aio_read+0x2b0/0x3a0 fs/aio.c:1501
 io_submit_one fs/aio.c:1611 [inline]
 do_io_submit+0xf99/0x14f0 fs/aio.c:1682
 SYSC_io_submit fs/aio.c:1707 [inline]
 SyS_io_submit+0x27/0x30 fs/aio.c:1704
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x440d49
RSP: 002b:00007ffdb8d2f008 EFLAGS: 00000213 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440d49
RDX: 0000000020bd9fe0 RSI: 0000000000000002 RDI: 00007f89f388e000
RBP: 0000000000007104 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000000
R13: 00000000004021d0 R14: 0000000000000000 R15: 0000000000000000
Code:  Bad RIP value.
RIP:           (null) RSP: ffff8801cb827818
CR2: 0000000000000000
---[ end trace e0c3dc2668b27d07 ]---