r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = dup(r0)
connect$inet6(r1, &(0x7f0000000000)={0xa, 0x0, 0x0, @remote, 0x1}, 0x1c)
getsockopt$inet6_tcp_buf(r1, 0x6, 0xb, 0x0, &(0x7f0000000040))