kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Modules linked in:
CPU: 0 PID: 15053 Comm: syz-executor2 Not tainted 4.15.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__skb_unlink include/linux/skbuff.h:1840 [inline]
RIP: 0010:skb_unlink+0xbb/0x160 net/core/skbuff.c:2918
RSP: 0018:ffff8801cabd7708 EFLAGS: 00010002
RAX: 0000000000000286 RBX: ffff8801c40951c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff8801c8e20e20 RDI: 0000000000000008
RBP: ffff8801cabd7730 R08: 0000000000000008 R09: 000000000000647f
R10: 9e6c8576b0ae2bba R11: ffff8801c8e20580 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801d2b8c7e0 R15: 0000000000000000
FS:  00007ff821fea700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc895637f8 CR3: 00000001d095a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kcm_recvmsg+0x3e3/0x5d0 net/kcm/kcmsock.c:1160
 sock_recvmsg_nosec net/socket.c:803 [inline]
 sock_recvmsg+0xb9/0xf0 net/socket.c:810
 ___sys_recvmsg+0x257/0x710 net/socket.c:2205
 __sys_recvmmsg+0x277/0xa90 net/socket.c:2313
 SYSC_recvmmsg net/socket.c:2394 [inline]
 SyS_recvmmsg+0xae/0x130 net/socket.c:2378
 do_syscall_64+0x270/0x970 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x455b59
RSP: 002b:00007ff821fe9c68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007ff821fea6d4 RCX: 0000000000455b59
RDX: 00000000040000f7 RSI: 00000000200002c0 RDI: 0000000000000006
RBP: 000000000072bea0 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000000000060 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000574 R14: 00000000006fd380 R15: 0000000000000000
Code: 00 00 00 49 8d 7d 08 4c 8b 63 08 48 ba 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 f9 48 c7 03 00 00 00 00 48 c1 e9 03 <80> 3c 11 00 75 5b 4c 89 e1 4d 89 65 08 48 ba 00 00 00 00 00 fc 
RIP: __skb_unlink include/linux/skbuff.h:1840 [inline] RSP: ffff8801cabd7708
RIP: skb_unlink+0xbb/0x160 net/core/skbuff.c:2918 RSP: ffff8801cabd7708
---[ end trace ebbe78980939364a ]---