r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/schedstat\x00', 0x0, 0x0)
r1 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f0000004540)='/proc/sys/net/ipv4/tcp_rmem\x00', 0x1, 0x0)
sendfile(r1, r0, &(0x7f0000004580)=0x8, 0x3)