linux-kernel - Re: [PATCH v6 3/5] crypto: tegra: Add Tegra Security Engine driver

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Message-ID: <ZgVCxnI0sZcE04io@gondor.apana.org.au>
Date: Thu, 28 Mar 2024 18:13:26 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Akhil R <akhilrajeev@...dia.com>
Cc: davem@...emloft.net, robh@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org, thierry.reding@...il.com, jonathanh@...dia.com,
	catalin.marinas@....com, will@...nel.org, mperttunen@...dia.com,
	airlied@...il.com, daniel@...ll.ch, linux-crypto@...r.kernel.org,
	devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v6 3/5] crypto: tegra: Add Tegra Security Engine driver

On Tue, Mar 19, 2024 at 01:53:04PM +0530, Akhil R wrote:
>
> +struct tegra_sha_reqctx {
> +	struct ahash_request fallback_req;

This doesn't work because ahash_request is dynamically sized.
So you'll end up clobbering the rest of the struct if a fallback
ends up being used.

You should place the fallback_req at the end of the reqctx and set
the reqsize based on the fallback reqsize.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt