On Sat, 2018-03-10 at 10:24 +0200, Tomas Winkler wrote: > + rlength = be32_to_cpu(tpm_cmd.header.out.length); > + if (rlength < offsetof(struct tpm_getrandom_out, rng_data) + > + recd) { > + total = -EFAULT; > + break; > + } > + memcpy(dest, tpm_cmd.params.getrandom_out.rng_data, recd); This rlength stuff can be handled with tpm_buf_length() as I do in my pendig-for-review patch set: https://patchwork.kernel.org/patch/10259331/ /Jarkko