netlink: 4 bytes leftover after parsing attributes in process `syz-executor5'.
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 20dbe1067 P4D 20dbe1067 PUD 1e00ba067 PMD 0 
Oops: 0010 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1119 Comm: syz-executor0 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
RSP: 0018:ffffc90000e43e60 EFLAGS: 00010216
RAX: 0000000000010000 RBX: ffff880211f3af00 RCX: ffffffff816783d1
RDX: 0000000000000014 RSI: ffff8801e19abc40 RDI: ffff880211f3af00
RBP: ffffc90000e43e98 R08: e6cf08bdf260d9ea R09: 0000000000000001
R10: ffffc90000e43df8 R11: 0000000000000000 R12: ffff8801e19abc40
R13: 0000000000000014 R14: ffff88021566f450 R15: 0000000000000000
FS:  00007f0aa8e6c700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001dd1da000 CR4: 00000000001426e0
Call Trace:
 aead_setkey+0x25/0x40 crypto/algif_aead.c:528
 alg_setkey crypto/af_alg.c:221 [inline]
 alg_setsockopt+0x140/0x180 crypto/af_alg.c:254
 SYSC_setsockopt net/socket.c:1829 [inline]
 SyS_setsockopt+0x8a/0x100 net/socket.c:1808
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f0aa8e6bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f0aa8e6c700 RCX: 0000000000452a39
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000013
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000000
R10: 0000000020751fec R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f0aa8e6c9c0 R15: 0000000000000000
Code:  Bad RIP value.
RIP:           (null) RSP: ffffc90000e43e60
CR2: 0000000000000000
---[ end trace 4cbc388d8784a9fe ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..