r0 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f0000000040)='/proc/sys/net/ipv4/tcp_rmem\x00', 0x1, 0x0)
write$binfmt_aout(r0, &(0x7f00000004c0)=ANY=[@ANYRESDEC, @ANYRESOCT], 0x20)