linux-kernel - Re: [PATCH v2] crypto: sun8i-ce: fix multiple memory leaks in sun8i_ce_hash

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Message-ID: <20210812100437.GA5055@gondor.apana.org.au>
Date:   Thu, 12 Aug 2021 18:04:37 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Dongliang Mu <mudongliangabcd@...il.com>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Xiang Chen <chenxiang66@...ilicon.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Corentin Labbe <clabbe@...libre.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Ard Biesheuvel <ardb@...nel.org>, linux-crypto@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] crypto: sun8i-ce: fix multiple memory leaks in
 sun8i_ce_hash_run

On Tue, Aug 03, 2021 at 02:31:38PM +0800, Dongliang Mu wrote:
>
> -theend:
> -	kfree(buf);
> +err_result:
>  	kfree(result);
> -	crypto_finalize_hash_request(engine, breq, err);
> +err_buf:
> +	kfree(buf);
> +out:
> +	if (!err)
> +		crypto_finalize_hash_request(engine, breq, err);
>  	return 0;

This does not look right.  You're returning zero in case of an error

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