r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$inet6_tcp_TCP_ZEROCOPY_RECEIVE(r0, 0x6, 0x23, &(0x7f00000001c0)={&(0x7f0000ffd000/0x2000)=nil, 0x2000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f0000000200)=0x17)