r0 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f0000000080)='/proc/sys/net/ipv4/tcp_wmem\x00', 0x1, 0x0)
write$binfmt_elf64(r0, &(0x7f0000000100)=ANY=[@ANYRESHEX, @ANYRESDEC=0x0], 0xfdef)