linux-kernel - Re: [PATCH] x86/microcode/AMD: check microcode file sanity before loading it

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Message-ID: <20180310131202.GB8261@pd.tnic>
Date:   Sat, 10 Mar 2018 14:12:02 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/microcode/AMD: check microcode file sanity before
 loading it

On Sat, Mar 10, 2018 at 01:26:00PM +0100, Maciej S. Szmigiero wrote:
> Without them, it is easy to crash the driver when just playing with
> microcode files

You're not supposed to play with the microcode files. If you do and
something breaks, you get to keep the pieces.

If the official microcode files have a problem, then I'm all ears.
Anything else contrived which doesn't actually happen unless someone
manipulates them is not an issue the microcode loader should protect
against.

-- 
Regards/Gruss,
    Boris.

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