linux-kernel - Re: [PATCH] x86/efi: Add necessary checks before iterating over efi.memmap

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Date:   Tue, 20 Sep 2016 10:56:18 +0100
From:   Matt Fleming <matt@...eblueprint.co.uk>
To:     Chao Gao <chao.gao@...el.com>
Cc:     "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/efi: Add necessary checks before iterating over
 efi.memmap

On Tue, 20 Sep, at 01:25:14PM, Chao Gao wrote:
> Sorry for bothering you. There is a regression since commit 78ce248f that if
> booting xen in UEFI mode, dom0 will crash and xen reboot constantly.
> This patch tries to fix it. Please take a look at it.

Can you try commit d4c4fed08f31 ("efi: Make
for_each_efi_memory_desc_in_map() cope with running on Xen") and see
if that fixes things for you?

That patch is already in Linus' tree and is included in v4.8-rc7.