r0 = openat$procfs(0xffffffffffffff9c, &(0x7f00000003c0)='/proc/key-users\x00', 0x0, 0x0)
r1 = socket$inet_icmp_raw(0x2, 0x3, 0x1)
sendfile(r1, r0, &(0x7f0000000040)=0x7fffffff, 0xffff)