linux-kernel - Re: [PATCH] efi: Fix the size not consistent issue when unmapping memory map

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Message-ID: <20180417203405.GA4574@rfwz>
Date:   Tue, 17 Apr 2018 14:34:05 -0600
From:   Randy Wright <rwright@....com>
To:     joeyli <jlee@...e.com>, dyoung@...hat.com
Cc:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        linux-efi@...r.kernel.org,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Takashi Iwai <tiwai@...e.de>, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        akpm@...ux-foundation.org, Vivek Goyal <vgoyal@...hat.com>,
        Dave Young <dyoung@...hat.com>
Subject: Re: [PATCH] efi: Fix the size not consistent issue when unmapping
 memory map

On Mon, Apr 16, 2018 at 06:35:22PM -0600, Randy Wright wrote:

> ... I will plan to run the same test tomorrow on
> a build of the SuSE 4.4.120-94.17 kernel, on which I had also reported
> the original bug.

I carried out the test on the older kernel today. I found the version of
arch/x86/kernel/kexec-bzimage64.c in the SuSE kernel version
4.4.120-94.17 was sufficiently different from the newer version that one
chunk of the patch under discussion was rejected.  Specifically, the
'struct kexec_buf kbuf' is not found in that older SuSE version of
kexec-bzimage64.c.   But I made the same modification to the
calculation of variable params_misc_sz in the older source, ran the same
test, and there were no longer any warnings from early_ioremap.c.

-- 
Randy Wright            Hewlett Packard Enterprise
Phone: (970) 898-0998   Mail: rwright@....com