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: 0 PID: 12909 Comm: syz-executor4 Not tainted 4.4.136-gfb7e319 #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b7480000 task.stack: ffff8801b4668000
RIP: 0010:[<ffffffff833d510a>]  [<ffffffff833d510a>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2377 [inline]
RIP: 0010:[<ffffffff833d510a>]  [<ffffffff833d510a>] __xfrm_policy_check+0xc9a/0x1b30 net/xfrm/xfrm_policy.c:2553
RSP: 0018:ffff8801db207310  EFLAGS: 00010206
RAX: 000000000836b15c RBX: 0000000041b58ab3 RCX: ffff8800b7480000
RDX: 0000000000000005 RSI: ffffffff833d50d9 RDI: 0000000041b58ae5
RBP: ffff8801db207558 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
R13: ffff8801db207450 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f699503b700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020c95ffd CR3: 000000009a9e5000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff833d45af ffff8801db2073b0 ffff8801db207448 0000000200000001
 ffff8801db2073b8 ffff8800b2ce7068 00000003000274e8 ffff8801db207460
 ffff8800b2c23b80 ffff880000000002 1ffff1003b640e72 ffff8801db2074b0
Call Trace:
 <IRQ> 
 [<ffffffff832d368e>] __xfrm_policy_check2 include/net/xfrm.h:1067 [inline]
 [<ffffffff832d368e>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
 [<ffffffff832d368e>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
 [<ffffffff832d368e>] udp_queue_rcv_skb+0x6de/0x1570 net/ipv4/udp.c:1520
 [<ffffffff832d456f>] flush_stack+0x4f/0x370 net/ipv6/udp.c:766
 [<ffffffff832d4fc0>] __udp4_lib_mcast_deliver.isra.42+0x730/0x870 net/ipv4/udp.c:1724
 [<ffffffff832d68cc>] __udp4_lib_rcv+0x17cc/0x23e0 net/ipv4/udp.c:1819
 [<ffffffff832d8b51>] udp_rcv+0x21/0x30 net/ipv4/udp.c:2043
 [<ffffffff832015c7>] ip_local_deliver_finish+0x257/0xa60 net/ipv4/ip_input.c:216
 [<ffffffff83203b41>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff83203b41>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff83203b41>] ip_local_deliver+0x1f1/0x380 net/ipv4/ip_input.c:257
 [<ffffffff8320242a>] dst_input include/net/dst.h:504 [inline]
 [<ffffffff8320242a>] ip_rcv_finish+0x65a/0x1640 net/ipv4/ip_input.c:365
 [<ffffffff832046b4>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff832046b4>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff832046b4>] ip_rcv+0x9e4/0x1190 net/ipv4/ip_input.c:455
 [<ffffffff82f7ead6>] __netif_receive_skb_core+0x12d6/0x2940 net/core/dev.c:4019
 [<ffffffff82f8019b>] __netif_receive_skb+0x5b/0x1b0 net/core/dev.c:4054
 [<ffffffff82f84726>] process_backlog+0x216/0x6a0 net/core/dev.c:4647
 [<ffffffff82f81562>] napi_poll net/core/dev.c:4885 [inline]
 [<ffffffff82f81562>] net_rx_action+0x3a2/0xdb0 net/core/dev.c:4950
 [<ffffffff838c5cec>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff838c3a9c>] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:929
 <EOI> 
 [<ffffffff8113d9d4>] do_softirq.part.16+0x54/0x60 kernel/softirq.c:317
 [<ffffffff8113f6c9>] do_softirq+0x19/0x20 kernel/softirq.c:320
 [<ffffffff82f7ca7c>] netif_rx_ni+0xec/0x3a0 net/core/dev.c:3653
 [<ffffffff82f7cf19>] dev_loopback_xmit+0x1e9/0x470 net/core/dev.c:3018
 [<ffffffff8321cad2>] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline]
 [<ffffffff8321cad2>] NF_HOOK include/linux/netfilter.h:249 [inline]
 [<ffffffff8321cad2>] ip_mc_output+0x492/0x980 net/ipv4/ip_output.c:326
 [<ffffffff8321a09b>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff8321a09b>] ip_local_out+0x9b/0x180 net/ipv4/ip_output.c:119
 [<ffffffff8321fe1c>] ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1451
 [<ffffffff832c8723>] udp_send_skb+0x5c3/0xc60 net/ipv4/udp.c:842
 [<ffffffff832d12d9>] udp_sendmsg+0x16c9/0x1c70 net/ipv4/udp.c:1072
 [<ffffffff83300ef3>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82f1e1fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e1fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1eedc>] SYSC_sendto+0x21c/0x370 net/socket.c:1665
 [<ffffffff82f21560>] SyS_sendto+0x40/0x50 net/socket.c:1633
 [<ffffffff838c2825>] 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  [<ffffffff833d510a>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2377 [inline]
RIP  [<ffffffff833d510a>] __xfrm_policy_check+0xc9a/0x1b30 net/xfrm/xfrm_policy.c:2553
 RSP <ffff8801db207310>
---[ end trace 13bf54377a91c768 ]---