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
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 14002 Comm: syz-executor6 Not tainted 4.4.151-g727cfac #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d4b5e000 task.stack: ffff8801ce870000
RIP: 0010:[<ffffffff833de52a>]  [<ffffffff833de52a>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2382 [inline]
RIP: 0010:[<ffffffff833de52a>]  [<ffffffff833de52a>] __xfrm_policy_check+0xc9a/0x1b30 net/xfrm/xfrm_policy.c:2558
RSP: 0018:ffff8801db307310  EFLAGS: 00010206
RAX: 03fffe20076cc1d7 RBX: 1ffff1003b660e8c RCX: ffff8801d4b5e000
RDX: 0000000000000006 RSI: ffffffff833de4f9 RDI: 1ffff1003b660ebe
RBP: ffff8801db307558 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801db307450 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fd1766ea700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30221000 CR3: 00000000b76e1000 CR4: 00000000001606f0
Stack:
 ffffffff833dd9cf ffff8801db3073b0 ffff8801db307448 0000000200000001
 ffff8801db3073b8 ffff8801d237a6a8 00000001000273c0 ffff8801db307450
 ffff8801d114dd80 ffff880100000002 1ffff1003b660e72 ffff8801db3074b0
Call Trace:
 <IRQ> 
 [<ffffffff832dca16>] __xfrm_policy_check2 include/net/xfrm.h:1067 [inline]
 [<ffffffff832dca16>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
 [<ffffffff832dca16>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
 [<ffffffff832dca16>] udp_queue_rcv_skb+0x6e6/0x1580 net/ipv4/udp.c:1520
 [<ffffffff832dd8ff>] flush_stack+0x4f/0x370 net/ipv6/udp.c:766
 [<ffffffff832de350>] __udp4_lib_mcast_deliver.isra.42+0x730/0x870 net/ipv4/udp.c:1724
 [<ffffffff832dfc5c>] __udp4_lib_rcv+0x17cc/0x23e0 net/ipv4/udp.c:1819
 [<ffffffff832e1ee1>] udp_rcv+0x21/0x30 net/ipv4/udp.c:2043
 [<ffffffff8320a2e7>] ip_local_deliver_finish+0x257/0xa60 net/ipv4/ip_input.c:216
 [<ffffffff8320c861>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff8320c861>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff8320c861>] ip_local_deliver+0x1f1/0x380 net/ipv4/ip_input.c:257
 [<ffffffff8320b14a>] dst_input include/net/dst.h:504 [inline]
 [<ffffffff8320b14a>] ip_rcv_finish+0x65a/0x1640 net/ipv4/ip_input.c:365
 [<ffffffff8320d3d4>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff8320d3d4>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff8320d3d4>] ip_rcv+0x9e4/0x1190 net/ipv4/ip_input.c:455
 [<ffffffff82f87726>] __netif_receive_skb_core+0x12d6/0x2940 net/core/dev.c:4019
 [<ffffffff82f88deb>] __netif_receive_skb+0x5b/0x1c0 net/core/dev.c:4054
 [<ffffffff82f8d306>] process_backlog+0x216/0x6a0 net/core/dev.c:4647
 [<ffffffff82f8a1c2>] napi_poll net/core/dev.c:4885 [inline]
 [<ffffffff82f8a1c2>] net_rx_action+0x3a2/0xdb0 net/core/dev.c:4950
audit: type=1326 audit(1535121825.917:9): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14013 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0
 [<ffffffff838cf73c>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff838cd49c>] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:929
 <EOI> 
 [<ffffffff811409f4>] do_softirq.part.16+0x54/0x60 kernel/softirq.c:317
 [<ffffffff811426e9>] do_softirq+0x19/0x20 kernel/softirq.c:320
 [<ffffffff82f856cc>] netif_rx_ni+0xec/0x3a0 net/core/dev.c:3653
 [<ffffffff82f85b69>] dev_loopback_xmit+0x1e9/0x470 net/core/dev.c:3018
 [<ffffffff83225922>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff83225922>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff83225922>] ip_mc_output+0x492/0x980 net/ipv4/ip_output.c:326
audit: type=1326 audit(1535121826.017:10): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14013 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x457089 code=0x0
 [<ffffffff83222eeb>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff83222eeb>] ip_local_out+0x9b/0x180 net/ipv4/ip_output.c:119
 [<ffffffff83228c6c>] ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1453
 [<ffffffff832d1aa3>] udp_send_skb+0x5c3/0xc60 net/ipv4/udp.c:842
 [<ffffffff832da659>] udp_sendmsg+0x16c9/0x1c70 net/ipv4/udp.c:1072
 [<ffffffff8330a283>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82f26ebc>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff82f26ebc>] sock_sendmsg+0xcc/0x110 net/socket.c:648
 [<ffffffff82f27b9c>] SYSC_sendto+0x21c/0x370 net/socket.c:1678
 [<ffffffff82f2a230>] SyS_sendto+0x40/0x50 net/socket.c:1646
 [<ffffffff838cc225>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: ff 48 c1 e8 03 42 80 3c 30 00 0f 85 11 0d 00 00 48 8b 85 f0 fd ff ff 48 8b 18 48 8d 7b 32 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 11 0d 00 00 0f b6 43 32 
RIP  [<ffffffff833de52a>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2382 [inline]
RIP  [<ffffffff833de52a>] __xfrm_policy_check+0xc9a/0x1b30 net/xfrm/xfrm_policy.c:2558
 RSP <ffff8801db307310>
---[ end trace 78e6cc4c32585b81 ]---