linux-kernel - Re: [PATCH] crypto: aesni: add setkey for driver-gcm-aes-aesni

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Message-ID: <20150120031704.GB10475@gondor.apana.org.au>
Date:	Tue, 20 Jan 2015 14:17:04 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Tadeusz Struk <tadeusz.struk@...el.com>,
	linux-crypto@...r.kernel.org, 'LKML' <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] crypto: aesni: add setkey for driver-gcm-aes-aesni

On Sun, Jan 18, 2015 at 11:56:03PM +0100, Stephan Mueller wrote:
> The cipher registered as __driver-gcm-aes-aesni is never intended
> to be used directly by any caller. Instead it is a service mechanism to
> rfc4106-gcm-aesni.
> 
> The kernel crypto API unconditionally calls the registered setkey
> function. In case a caller erroneously uses __driver-gcm-aes-aesni a
> call to crypto_aead_setkey will cause a NULL pointer dereference without
> this patch.
> 
> CC: Tadeusz Struk <tadeusz.struk@...el.com>
> Signed-off-by: Stephan Mueller <smueller@...onox.de>

Rather than adding a bogus setkey function, please fix this mess
properly by moving the top-level setkey function into the __driver
one where it should be.  Compare with how we handle it in the
ablk_helper which is pretty much the same thing.

Thanks,
-- 
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
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