netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 18130 at net/xfrm/xfrm_policy.c:797 xfrm_policy_insert+0x6fa/0x10e0 net/xfrm/xfrm_policy.c:797
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 18130 Comm: syz-executor.0 Not tainted 4.9.186+ #9
 ffff8801b35e73b0 ffffffff81b5a0b1 0000000000000000 ffffffff82a3a9a0
 00000000ffffffff 0000000000000000 0000000000000009 ffff8801b35e7490
 ffffffff813fd59a 0000000041b58ab3 ffffffff82e317a2 ffffffff813fd3c1
Call Trace:
 [<00000000f6b14b57>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000f6b14b57>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000ab8f0a5b>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<0000000067f8c1f3>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<00000000d3872e75>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<00000000ea773c69>] xfrm_policy_insert+0x6fa/0x10e0 net/xfrm/xfrm_policy.c:797
 [<00000000562862eb>] xfrm_add_policy+0x23c/0x4b0 net/xfrm/xfrm_user.c:1629
 [<00000000d7063eba>] xfrm_user_rcv_msg+0x3c1/0x620 net/xfrm/xfrm_user.c:2613
 [<0000000017d0d7c7>] netlink_rcv_skb+0xd4/0x2e0 net/netlink/af_netlink.c:2365
 [<0000000022c5471a>] xfrm_netlink_rcv+0x70/0x90 net/xfrm/xfrm_user.c:2621
 [<000000000760bf28>] netlink_unicast_kernel net/netlink/af_netlink.c:1285 [inline]
 [<000000000760bf28>] netlink_unicast+0x4c6/0x6d0 net/netlink/af_netlink.c:1311
 [<00000000376d06e3>] netlink_sendmsg+0x6b6/0xc80 net/netlink/af_netlink.c:1859
 [<00000000b3fad42f>] sock_sendmsg_nosec net/socket.c:649 [inline]
 [<00000000b3fad42f>] sock_sendmsg+0xbe/0x110 net/socket.c:659
 [<00000000297c0d1f>] ___sys_sendmsg+0x78b/0x8b0 net/socket.c:1983
 [<00000000ac0969b1>] __sys_sendmsg+0xc8/0x170 net/socket.c:2017
 [<000000003e209fd7>] SYSC_sendmsg net/socket.c:2028 [inline]
 [<000000003e209fd7>] SyS_sendmsg+0x2d/0x50 net/socket.c:2024
 [<00000000ae4489b6>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<0000000067e5bd90>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..