BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 2123f2067 P4D 2123f2067 PUD 1df354067 PMD 0 
Oops: 0010 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 22018 Comm: syz-executor4 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:ffffc90001023e60 EFLAGS: 00010212
RAX: 0000000000010000 RBX: ffff880213bfab00 RCX: ffffffff816783d1
RDX: 00000000000000b7 RSI: ffff8801df1740c0 RDI: ffff880213bfab00
RBP: ffffc90001023e98 R08: 0000000000000000 R09: 0000000000000001
R10: ffffc90001023df8 R11: 0000000000000000 R12: ffff8801df1740c0
R13: 00000000000000b7 R14: ffff880215680850 R15: 0000000000000000
FS:  00007fb21bfd2700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001dbf44000 CR4: 00000000001426f0
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:00007fb21bfd1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fb21bfcf4f0 RCX: 0000000000452a39
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000016
RBP: 00007fb21bfcf4c0 R08: 00000000000000b7 R09: 0000000000000000
R10: 0000000020ec7f49 R11: 0000000000000212 R12: 00000000004b7733
R13: 00007fb21bfd1ba0 R14: 00007fb21bfd26d4 R15: 0000000000000000
Code:  Bad RIP value.
RIP:           (null) RSP: ffffc90001023e60
CR2: 0000000000000000
---[ end trace 387608702f1e36b9 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..