kasan: CONFIG_KASAN_INLINE enabled
dccp_invalid_packet: P.Data Offset(0) too small
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
dccp_invalid_packet: P.Data Offset(0) too small
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3972 Comm: syz-executor7 Not tainted 4.15.0-rc2+ #145
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000aa3f4dbf task.stack: 000000006a862ee8
RIP: 0010:virt_to_head_page include/linux/mm.h:615 [inline]
RIP: 0010:virt_to_cache mm/slab.c:399 [inline]
RIP: 0010:kfree+0xa0/0x250 mm/slab.c:3802
RSP: 0018:ffff8801d91a7780 EFLAGS: 00010007
RAX: ffffea0000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 037febd000000000 RSI: 0000000000000000 RDI: dffffc0000000000
RBP: ffff8801d91a77a0 R08: ffff8801d5ffd040 R09: ffff8801d49b8000
R10: ffff8801d91a7950 R11: 0000000000000108 R12: 0000000000000286
R13: ffffffff8226011b R14: dffffc0000000000 R15: ffff8801d91a78b0
FS:  00007fb173917700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020a3bff0 CR3: 00000001c84ee000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139
 encrypt+0x20e/0x540 arch/x86/crypto/salsa20_glue.c:79
 skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline]
 skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640
 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline]
 _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline]
 skcipher_recvmsg+0xa54/0xf20 crypto/algif_skcipher.c:165
 sock_recvmsg_nosec net/socket.c:805 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:812
 ___sys_recvmsg+0x29b/0x630 net/socket.c:2207
 __sys_recvmsg+0xe2/0x210 net/socket.c:2252
 SYSC_recvmsg net/socket.c:2264 [inline]
 SyS_recvmsg+0x2d/0x50 net/socket.c:2259
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007fb173916c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39
RDX: 0000000000000000 RSI: 0000000020539fc8 RDI: 0000000000000019
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007fb1739176d4 R15: 0000000000000000
Code: 0f 82 c6 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 b8 00 00 00 00 00 ea ff ff 48 89 df 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 20 48 8d 48 ff a8 01 48 0f 45 d1 4c 8b 6a 30 49 63 75 
RIP: virt_to_head_page include/linux/mm.h:615 [inline] RSP: ffff8801d91a7780
RIP: virt_to_cache mm/slab.c:399 [inline] RSP: ffff8801d91a7780
RIP: kfree+0xa0/0x250 mm/slab.c:3802 RSP: ffff8801d91a7780
---[ end trace 986b7f86156492d1 ]---