r0 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$inet6_IPV6_XFRM_POLICY(r0, 0x29, 0x23, &(0x7f00000003c0)={{{@in=@dev, @in6=@initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, 0xa}}, {{@in6=@ipv4={'\x00', '\xff\xff', @private}}, 0x0, @in6=@loopback}}, 0xe8)