From mboxrd@z Thu Jan  1 00:00:00 1970
From: will.deacon@arm.com (Will Deacon)
Date: Wed, 17 Jan 2018 10:19:23 +0000
Subject: [PATCH] efi/arm*: Only register page tables when they exist
In-Reply-To: <20180116140832.26731-1-mark.rutland@arm.com>
References: <20180116140832.26731-1-mark.rutland@arm.com>
Message-ID: <20180117101922.GB27892@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

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@arm.com>

Ard -- please can you pick this one up?

Cheers,

Will