linux-kernel - Re: [PATCH v2 3/8] tpm: factor out tpm1_get

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Date:   Thu, 15 Mar 2018 18:32:44 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Tomas Winkler <tomas.winkler@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/8] tpm: factor out tpm1_get_random into tpm1-cmd.c

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