r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
setsockopt$inet6_IPV6_FLOWLABEL_MGR(r0, 0x29, 0x10, 0x0, 0x4d)
sendmsg$inet6(r0, &(0x7f0000000680)={&(0x7f00000001c0)={0xa, 0x0, 0x0, @empty}, 0x1c, 0x0}, 0x2004c895)