r0 = socket$inet_tcp(0x2, 0x1, 0x0)
r1 = dup2(r0, r0)
getsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r1, 0x6, 0x23, &(0x7f00000001c0)={&(0x7f0000ffd000/0x1000)=nil, 0x1000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f0000000140)=0x40)