r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
getsockopt$inet6_IPV6_FLOWLABEL_MGR(r1, 0x29, 0x20, &(0x7f0000000140)={@private2}, &(0x7f0000000180)=0x20)