linux-kernel - Re: [PATCH] Map in physical addresses in efi_map_region

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 16 Aug 2016 07:38:10 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Alex Thorlton <athorlton@....com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	linux-kernel@...r.kernel.org, Russ Anderson <rja@....com>,
	Dimitri Sivanich <sivanich@....com>,
	Mike Travis <travis@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-efi@...r.kernel.org, Dave Young <dyoung@...hat.com>
Subject: Re: [PATCH] Map in physical addresses in efi_map_region_fixed

On Mon, Aug 15, 2016 at 02:52:22PM -0700, H. Peter Anvin wrote:
> So to answer the implicit question: we have found UEFI stacks in the
> field which fail without the physical mappings present, and we have
> found stacks which fail without a nontrivial SetAddressMapping.

You mean SetVirtualAddressMap.

Oh well, it's not like it matters all that much as we have our own
pagetable for EFI so we can go nuts there. Apparently.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--