linux-kernel - Re: [PATCH] crypto: mediatek - Add empty messages check in GCM mode

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Message-ID: <3037420.ZP13UAVzzO@tauon.chronox.de>
Date:   Wed, 16 Aug 2017 14:18:02 +0200
From:   Stephan Mueller <smueller@...onox.de>
To:     Ryder Lee <ryder.lee@...iatek.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: mediatek - Add empty messages check in GCM mode

Am Mittwoch, 16. August 2017, 13:19:48 CEST schrieb Ryder Lee:

Hi Ryder,

> Currently, empty messages are not supported in GCM mode, hence add
> a check to prevent producing incorrect results.

In case the caller would provide empty messages, would there be just wrong 
data or a real problem? Note, unprivileged user space can make such requests.

If there would be a real problem (like crash), this should also go to stable.

Ciao
Stephan