r0 = socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$sock_SIOCDELRT(r0, 0x890c, &(0x7f0000005440)={0x0, @sco={0x1f, @fixed}, @vsock={0x28, 0x0, 0x0, @local}, @nl})