linux-kernel - Re: [PATCH v2 1/4] crypto: s5p-sss: Fix race in error handling

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Message-ID: <CAJKOXPeADXdhBYiVeErjgxnGdTLJVKNtpK65mXzg6m=hL8XRJA@mail.gmail.com>
Date:   Tue, 18 Sep 2018 09:33:35 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     c.manszewski@...sung.com
Cc:     linux-crypto@...r.kernel.org, vz@...ia.com,
        k.konieczny@...tner.samsung.com, herbert@...dor.apana.org.au,
        davem@...emloft.net,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
        Bartłomiej Żołnierkiewicz 
        <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v2 1/4] crypto: s5p-sss: Fix race in error handling

On Mon, 17 Sep 2018 at 17:10, Christoph Manszewski
<c.manszewski@...sung.com> wrote:
>
> Remove a race condition introduced by error path in functions:
> s5p_aes_interrupt and s5p_aes_crypt_start. Setting the busy field of
> struct s5p_aes_dev to false made it possible for s5p_tasklet_cb to
> change the req field, before s5p_aes_complete was called.
>
> Change the first parameter of s5p_aes_complete to struct
> ablkcipher_request. Before spin_unlock, make a copy of the currently
> handled request, to ensure s5p_aes_complete function call with the
> correct request.
>
> Signed-off-by: Christoph Manszewski <c.manszewski@...sung.com>
> ---
>  drivers/crypto/s5p-sss.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof