linux-kernel - Re: [PATCH] x86/microcode/intel: Ensure new microcode processor flags match with cpu's pf

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Message-ID: <20180619091205.GA30870@zn.tnic>
Date:   Tue, 19 Jun 2018 11:12:05 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Zhenzhong Duan <zhenzhong.duan@...cle.com>
Cc:     Linux-Kernel <linux-kernel@...r.kernel.org>, mingo@...hat.com,
        tglx@...utronix.de, Srinivas REDDY Eeda <srinivas.eeda@...cle.com>,
        hpa@...or.com
Subject: Re: [PATCH] x86/microcode/intel: Ensure new microcode processor
 flags match with cpu's pf

On Tue, Jun 19, 2018 at 12:49:40PM +0800, Zhenzhong Duan wrote:
> Imagine kernel already found a microcode blob A with extended sig/pf
> matching current cpu, then another microcode B is checked which doesn't
> match current cpu...

Do you see the

	if (!microcode_matches(mc_header, uci->cpu_sig.sig)) {

call a couple of lines earlier?

-- 
Regards/Gruss,
    Boris.

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