r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
bind$inet6(r0, &(0x7f00000000c0)={0xa, 0x4e20, 0x0, @loopback}, 0x1c)
listen(r0, 0x0)
r1 = socket$inet6_tcp(0xa, 0x1, 0x0)
setsockopt$inet6_mtu(r1, 0x29, 0x17, &(0x7f0000000000)=0x5, 0x4)
connect$inet6(r1, &(0x7f0000000040)={0xa, 0x4e20, 0x0, @loopback}, 0x1c)