r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000280)='/proc/key-users\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000bc0)=[{&(0x7f0000000a40)=""/230, 0xe6}], 0x1, 0x2, 0x0)