------------[ cut here ]------------
WARNING: CPU: 0 PID: 4623 at net/xfrm/xfrm_policy.c:797 xfrm_policy_insert+0x701/0x1140 net/xfrm/xfrm_policy.c:797
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4623 Comm: syz-executor.5 Not tainted 4.9.141+ #1
 ffff8801d40b7398 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff
 ffffffff82cb8900 0000000000000000 0000000000000009 ffff8801d40b7458
 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f7125>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f7362>] __warn.cold.8+0x2f/0x2f kernel/panic.c:542
 [<ffffffff810dc02c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff82638711>] xfrm_policy_insert+0x701/0x1140 net/xfrm/xfrm_policy.c:797
 [<ffffffff826751e8>] xfrm_add_policy+0x248/0x4f0 net/xfrm/xfrm_user.c:1624
 [<ffffffff82668104>] xfrm_user_rcv_msg+0x3c4/0x640 net/xfrm/xfrm_user.c:2608
 [<ffffffff823d59e5>] netlink_rcv_skb+0x145/0x370 net/netlink/af_netlink.c:2365
 [<ffffffff82661daf>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2616
 [<ffffffff823d4478>] netlink_unicast_kernel net/netlink/af_netlink.c:1285 [inline]
 [<ffffffff823d4478>] netlink_unicast+0x4d8/0x6d0 net/netlink/af_netlink.c:1311
 [<ffffffff823d4e44>] netlink_sendmsg+0x694/0xc30 net/netlink/af_netlink.c:1859
 [<ffffffff822a063b>] sock_sendmsg_nosec net/socket.c:648 [inline]
 [<ffffffff822a063b>] sock_sendmsg+0xbb/0x110 net/socket.c:658
 [<ffffffff822a231c>] ___sys_sendmsg+0x6fc/0x840 net/socket.c:1982
SELinux: unrecognized netlink message: protocol=6 nlmsg_type=47498 sclass=netlink_xfrm_socket pig=4632 comm=syz-executor.1
 [<ffffffff822a5339>] __sys_sendmsg+0xd9/0x190 net/socket.c:2016
 [<ffffffff822a541d>] SYSC_sendmsg net/socket.c:2027 [inline]
 [<ffffffff822a541d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2023
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..