r0 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f0000000080)='/proc/sys/net/ipv4/tcp_rmem\x00', 0x1, 0x0)
io_setup(0x9, &(0x7f0000000440)=<r1=>0x0)
io_submit(r1, 0x1, &(0x7f0000000400)=[&(0x7f0000000100)={0x0, 0x0, 0x0, 0x1, 0x0, r0, 0x0, 0xfeffff}])