linux-kernel - Re: [PATCH] efi/arm*: Only register page tables when they exist

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Message-ID: <CAKv+Gu8kKW41ZEmyTi-OiwAuxPvObOj+b-QtNvXAN7Oc4kRHyg@mail.gmail.com>
Date:   Tue, 23 Jan 2018 18:50:33 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Will Deacon <will.deacon@....com>
Cc:     Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-efi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] efi/arm*: Only register page tables when they exist

On 17 January 2018 at 12:01, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
> On 17 January 2018 at 10:19, Will Deacon <will.deacon@....com> wrote:
>> On Tue, Jan 16, 2018 at 02:08:32PM +0000, Mark Rutland wrote:
>>> Currently the arm/arm64 runtime code registers the runtime servies
>>> pagetables with ptdump regardless of whether runtime services page
>>> tables have been created.
>>>
>>> As efi_mm.pgd is NULL in these cases, attempting to dump the efi page
>>> tables results in a NULL pointer dereference in the ptdump code:
>>
>> Acked-by: Will Deacon <will.deacon@....com>
>>
>> Ard -- please can you pick this one up?
>>
>
> I'll see if I can manage applying it.
>

Applied for -next, thanks.