linux-kernel - Re: [PATCH 2/3] crypto: Fix potential leak in test_aead_speed() if crypto_alloc

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Date:	Wed, 23 Apr 2014 10:20:58 -0700
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Christian Engelmayer <cengelma@....at>
Cc:	herbert@...dor.apana.org.au, davem@...emloft.net,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] crypto: Fix potential leak in test_aead_speed() if
 crypto_alloc_aead() fails

On Mon, 2014-04-21 at 20:46 +0200, Christian Engelmayer wrote:
> Fix a potential memory leak in the error handling of test_aead_speed(). In case
> crypto_alloc_aead() fails, the function returns without going through the
> centralized cleanup path. Reported by Coverity - CID 1163870.
> 
> Signed-off-by: Christian Engelmayer <cengelma@....at>

Acked.

Tim

> ---
>  crypto/tcrypt.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
> index 1856d7f..1849155 100644
> --- a/crypto/tcrypt.c
> +++ b/crypto/tcrypt.c
> @@ -313,7 +313,7 @@ static void test_aead_speed(const char *algo, int enc, unsigned int sec,
>  	if (IS_ERR(tfm)) {
>  		pr_err("alg: aead: Failed to load transform for %s: %ld\n", algo,
>  		       PTR_ERR(tfm));
> -		return;
> +		goto out_notfm;
>  	}
>  
>  	req = aead_request_alloc(tfm, GFP_KERNEL);
> @@ -391,6 +391,7 @@ static void test_aead_speed(const char *algo, int enc, unsigned int sec,
>  
>  out:
>  	crypto_free_aead(tfm);
> +out_notfm:
>  	kfree(sg);
>  out_nosg:
>  	testmgr_free_buf(xoutbuf);


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