kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3033 Comm: syz-executor5 Not tainted 4.9.86-gb324a70 #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d6e66000 task.stack: ffff8801b0d30000
RIP: 0010:[<ffffffff833c9758>]  [<ffffffff833c9758>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2410 [inline]
RIP: 0010:[<ffffffff833c9758>]  [<ffffffff833c9758>] __xfrm_policy_check+0xbf8/0x1a30 net/xfrm/xfrm_policy.c:2586
RSP: 0018:ffff8801db2075a0  EFLAGS: 00010202
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffffffff833c9727
RDX: 0000000000000002 RSI: ffff8801db2076e8 RDI: 0000000000000032
RBP: ffff8801db2077e8 R08: 0000000000000003 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f1ac64c8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020bc8ff0 CR3: 00000001b2cc4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff833c8c9d ffff8801db2076d8 ffff8801db207640 000000018123c659
 ffff8801db207680 ffff8801c1b521a8 ffff8801db207650 ffff8801b2609a40
 00000002000268a8 1ffff1003b640ec4 ffff8801db2076e8 ffff8801db207740
Call Trace:
 [<ffffffff832c53f7>] __xfrm_policy_check2 include/net/xfrm.h:1063 [inline]
 [<ffffffff832c53f7>] xfrm_policy_check include/net/xfrm.h:1072 [inline]
 [<ffffffff832c53f7>] xfrm4_policy_check include/net/xfrm.h:1077 [inline]
 [<ffffffff832c53f7>] udp_queue_rcv_skb+0x537/0x1760 net/ipv4/udp.c:1509
 [<ffffffff832c7cb4>] __udp4_lib_mcast_deliver net/ipv4/udp.c:1690 [inline]
 [<ffffffff832c7cb4>] __udp4_lib_rcv+0x1694/0x2b70 net/ipv4/udp.c:1783
 [<ffffffff832ca191>] udp_rcv+0x21/0x30 net/ipv4/udp.c:1964
 [<ffffffff831ef245>] ip_local_deliver_finish+0x285/0xa80 net/ipv4/ip_input.c:216
 [<ffffffff831f028a>] NF_HOOK_THRESH include/linux/netfilter.h:232 [inline]
 [<ffffffff831f028a>] NF_HOOK include/linux/netfilter.h:255 [inline]
 [<ffffffff831f028a>] ip_local_deliver+0x30a/0x4d0 net/ipv4/ip_input.c:257
 [<ffffffff831edddb>] dst_input include/net/dst.h:513 [inline]
 [<ffffffff831edddb>] ip_rcv_finish+0x71b/0x1900 net/ipv4/ip_input.c:396
 [<ffffffff831f1012>] NF_HOOK_THRESH include/linux/netfilter.h:232 [inline]
 [<ffffffff831f1012>] NF_HOOK include/linux/netfilter.h:255 [inline]
 [<ffffffff831f1012>] ip_rcv+0xbc2/0x1620 net/ipv4/ip_input.c:487
 [<ffffffff82f3d643>] __netif_receive_skb_core+0xa33/0x29e0 net/core/dev.c:4252
 [<ffffffff82f3f64b>] __netif_receive_skb+0x5b/0x1c0 net/core/dev.c:4290
 [<ffffffff82f3f984>] process_backlog+0x1d4/0x690 net/core/dev.c:4911
 [<ffffffff82f45a96>] napi_poll net/core/dev.c:5212 [inline]
 [<ffffffff82f45a96>] net_rx_action+0x396/0xe00 net/core/dev.c:5277
 [<ffffffff838bc0d6>] __do_softirq+0x206/0x951 kernel/softirq.c:284
 [<ffffffff838b65dc>] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:844
 <EOI> [  331.498040]  [<ffffffff81145219>] do_softirq.part.16+0x99/0xb0 kernel/softirq.c:328
 [<ffffffff81146a09>] do_softirq+0x19/0x20 kernel/softirq.c:331
 [<ffffffff82f42f90>] netif_rx_ni+0x140/0x320 net/core/dev.c:3882
 [<ffffffff82f43369>] dev_loopback_xmit+0x1f9/0x480 net/core/dev.c:3206
 [<ffffffff83208fcc>] ip_mc_finish_output net/ipv4/ip_output.c:327 [inline]
 [<ffffffff83208fcc>] NF_HOOK_THRESH include/linux/netfilter.h:232 [inline]
 [<ffffffff83208fcc>] NF_HOOK include/linux/netfilter.h:255 [inline]
 [<ffffffff83208fcc>] ip_mc_output+0x58c/0xd50 net/ipv4/ip_output.c:365
 [<ffffffff832067a5>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff832067a5>] ip_local_out+0x95/0x170 net/ipv4/ip_output.c:124
 [<ffffffff8320c66c>] ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1486
 [<ffffffff832b9bdc>] udp_send_skb+0x65c/0xcc0 net/ipv4/udp.c:833
 [<ffffffff832bed30>] udp_sendmsg+0x9a0/0x1c10 net/ipv4/udp.c:1055
 [<ffffffff832f29bc>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:770
 [<ffffffff82ed8baa>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed8baa>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed9b08>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82edc010>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5613>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: ff 48 c1 e8 03 42 80 3c 30 00 0f 85 f9 0b 00 00 48 8b 85 08 fe 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 c3 0b 00 00 0f b6 43 32 
RIP  [<ffffffff833c9758>] xfrm_policy_ok net/xfrm/xfrm_policy.c:2410 [inline]
RIP  [<ffffffff833c9758>] __xfrm_policy_check+0xbf8/0x1a30 net/xfrm/xfrm_policy.c:2586
 RSP <ffff8801db2075a0>
---[ end trace ca4cd377fb251050 ]---