r0 = socket$inet6_udp(0xa, 0x2, 0x0)
openat(0xffffffffffffff9c, 0x0, 0x0, 0x0)
openat(0xffffffffffffffff, 0x0, 0x0, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f00000002c0)={@mcast1, @empty, @local, 0x0, 0x5, 0x0, 0x0, 0x0, 0x3400019})