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

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Message-ID: <40625395.stBBYbAQtz@tachyon.chronox.de>
Date:	Wed, 21 Jan 2015 02:25:18 +0100
From:	Stephan Mueller <smueller@...onox.de>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-crypto@...r.kernel.org, 'LKML' <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] crypto: aesni: add setkey for driver-gcm-aes-aesni

Am Dienstag, 20. Januar 2015, 14:17:04 schrieb Herbert Xu:

Hi Tadeusz,

> 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.

Tadeusz, are you working on that update or shall I have a look?

-- 
Ciao
Stephan
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