linux-kernel - Re: [PATCH] crypto: ccree: don't attempt 0 len DMA mappings

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Message-ID: <YhWqvg47iQXWveOr@gondor.apana.org.au>
Date:   Wed, 23 Feb 2022 15:32:14 +1200
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Gilad Ben-Yossef <gilad@...yossef.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Ofir Drang <ofir.drang@....com>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: ccree: don't attempt 0 len DMA mappings

On Thu, Feb 17, 2022 at 09:27:26PM +0200, Gilad Ben-Yossef wrote:
> Refuse to try mapping zero bytes as this may cause a fault
> on some configurations / platforms and it seems the prev.
> attempt is not enough and we need to be more explicit.
> 
> Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
> Reported-by: Corentin Labbe <clabbe.montjoie@...il.com>
> Fixes: ce0fc6db38de ("crypto: ccree - protect against empty or NULL
> scatterlists")
> ---
>  drivers/crypto/ccree/cc_buffer_mgr.c | 7 +++++++
>  1 file changed, 7 insertions(+)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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