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

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Date:   Mon, 17 Sep 2018 17:47:24 +0200
From:   Kamil Konieczny <k.konieczny@...tner.samsung.com>
To:     Christoph Manszewski <c.manszewski@...sung.com>,
        linux-crypto@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzk@...nel.org>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v2 1/4] crypto: s5p-sss: Fix race in error handling



On 17.09.2018 17:09, Christoph Manszewski 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>

Acked-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>

Thanks!
Kamil

-- 
Best regards,
Kamil Konieczny
Samsung R&D Institute Poland