audit: type=1400 audit(1575416752.363:345): avc:  denied  { create } for  pid=23190 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 23251 Comm: syz-executor.5 Not tainted 4.4.174+ #4
task: ffff8801cec5df00 task.stack: ffff8800865a0000
RIP: 0010:[<ffffffff824813bd>]  [<ffffffff824813bd>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP: 0010:[<ffffffff824813bd>]  [<ffffffff824813bd>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP: 0010:[<ffffffff824813bd>]  [<ffffffff824813bd>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
RIP: 0010:[<ffffffff824813bd>]  [<ffffffff824813bd>] udp_queue_rcv_skb+0x18d/0x14e0 net/ipv4/udp.c:1520
RSP: 0018:ffff8800865a79f0  EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90001724000
RDX: 000000000000000c RSI: ffffffff824813a4 RDI: 0000000000000060
netlink: 2 bytes leftover after parsing attributes in process `syz-executor.2'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket
RBP: ffff8800865a7a30 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800a300ed40
R13: ffff8801cf8d5a00 R14: 0000000000000000 R15: ffff8801cf8d5a58
FS:  00007f05d9eff700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
audit: type=1400 audit(1575416752.513:346): avc:  denied  { create } for  pid=23259 comm="syz-executor.1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f099bec5db8 CR3: 00000001d7e20000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800a300ed40 ffff880000000001 ffff8800a300edc8 ffff8800a300ed40
 ffff8801cf8d5a00 dffffc0000000000 ffff8800a300edc8 0000000000000000
 ffff8800865a7aa0 ffffffff821e5e40 ffff8800a300f170 ffff8800a300eec8
Call Trace:
 [<ffffffff821e5e40>] sk_backlog_rcv include/net/sock.h:875 [inline]
 [<ffffffff821e5e40>] __release_sock net/core/sock.c:2024 [inline]
 [<ffffffff821e5e40>] release_sock+0x170/0x500 net/core/sock.c:2477
 [<ffffffff8247f646>] udp_sendmsg+0x1176/0x1c60 net/ipv4/udp.c:1107
Dead loop on virtual device ip6_vti0, fix it urgently!
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821dc4f1>] SYSC_sendto net/socket.c:1678 [inline]
 [<ffffffff821dc4f1>] SyS_sendto+0x201/0x340 net/socket.c:1646
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 8b 75 58 41 f6 c6 01 0f 85 f9 07 00 00 e8 4c 82 e8 fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 6a 0e 00 00 41 f6 46 60 04 
RIP  [<ffffffff824813bd>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP  [<ffffffff824813bd>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP  [<ffffffff824813bd>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
RIP  [<ffffffff824813bd>] udp_queue_rcv_skb+0x18d/0x14e0 net/ipv4/udp.c:1520
 RSP <ffff8800865a79f0>
---[ end trace 2732bbf60487d6db ]---