linux-kernel - Re: [RFC 2/7] crypto: Use GHASH digest algorithm in GCM

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Date:	Wed, 17 Jun 2009 22:47:36 +0200
From:	Sebastian Andrzej Siewior <linux-crypto@...breakpoint.cc>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [RFC 2/7] crypto: Use GHASH digest algorithm in GCM

* Huang Ying | 2009-06-11 15:10:28 [+0800]:

>Remove the dedicated GHASH implementation in GCM, and uses the GHASH
>digest algorithm instead. This will make GCM uses hardware accelerated
>GHASH implementation automatically if available.
>
>ahash instead of shash interface is used, because some hardware
>accelerated GHASH implementation needs asynchronous interface.
The outside interface is also async so this should work.

>Signed-off-by: Huang Ying <ying.huang@...el.com>
>
>@@ -796,14 +996,15 @@ static int __init crypto_gcm_module_init
> 	if (err)
> 		goto out_undo_gcm;
> 
>-out:
>-	return err;
>+	return 0;
> 
> out_undo_gcm:
> 	crypto_unregister_template(&crypto_gcm_tmpl);
> out_undo_base:
> 	crypto_unregister_template(&crypto_gcm_base_tmpl);
>-	goto out;
>+out:
>+	kfree(gcm_zeroes);
>+	return err;
> }
> 
> static void __exit crypto_gcm_module_exit(void)
here you are leaking gcm_zeroes

Sebastian
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