linux-kernel - Re: [PATCHv9 16/16] x86: Re-enable Linear Address Masking

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]

Message-ID: <icjt25k4azqzkv5xlobcmlcubulohvfjakkb35dusiqe2xutq3@6jvha7chwwxd>
Date: Wed, 9 Jul 2025 14:00:44 +0300
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: Sohil Mehta <sohil.mehta@...el.com>
Cc: Andy Lutomirski <luto@...nel.org>, 
	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ard Biesheuvel <ardb@...nel.org>, 
	"Paul E. McKenney" <paulmck@...nel.org>, Josh Poimboeuf <jpoimboe@...nel.org>, 
	Xiongwei Song <xiongwei.song@...driver.com>, Xin Li <xin3.li@...el.com>, 
	"Mike Rapoport (IBM)" <rppt@...nel.org>, Brijesh Singh <brijesh.singh@....com>, 
	Michael Roth <michael.roth@....com>, Tony Luck <tony.luck@...el.com>, 
	Alexey Kardashevskiy <aik@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
	Jonathan Corbet <corbet@....net>, Ingo Molnar <mingo@...nel.org>, 
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Daniel Sneddon <daniel.sneddon@...ux.intel.com>, 
	Kai Huang <kai.huang@...el.com>, Sandipan Das <sandipan.das@....com>, 
	Breno Leitao <leitao@...ian.org>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	Alexei Starovoitov <ast@...nel.org>, Hou Tao <houtao1@...wei.com>, Juergen Gross <jgross@...e.com>, 
	Vegard Nossum <vegard.nossum@...cle.com>, Kees Cook <kees@...nel.org>, Eric Biggers <ebiggers@...gle.com>, 
	Jason Gunthorpe <jgg@...pe.ca>, "Masami Hiramatsu (Google)" <mhiramat@...nel.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Luis Chamberlain <mcgrof@...nel.org>, 
	Yuntao Wang <ytcoode@...il.com>, Rasmus Villemoes <linux@...musvillemoes.dk>, 
	Christophe Leroy <christophe.leroy@...roup.eu>, Tejun Heo <tj@...nel.org>, Changbin Du <changbin.du@...wei.com>, 
	Huang Shijie <shijie@...amperecomputing.com>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Namhyung Kim <namhyung@...nel.org>, Arnaldo Carvalho de Melo <acme@...hat.com>, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org, 
	linux-mm@...ck.org
Subject: Re: [PATCHv9 16/16] x86: Re-enable Linear Address Masking

On Tue, Jul 08, 2025 at 10:31:05PM -0700, Sohil Mehta wrote:
> On 7/7/2025 1:03 AM, Kirill A. Shutemov wrote:
> > This reverts commit 3267cb6d3a174ff83d6287dcd5b0047bbd912452.
> > 
> > LASS mitigates the Spectre based on LAM (SLAM) [1] and the previous
> > commit made LAM depend on LASS, so we no longer need to disable LAM at
> > compile time, so revert the commit that disables LAM.
> > 
> 
> Reviewed-by: Sohil Mehta <sohil.mehta@...el.com>
> 
> You may have missed my comments in the previous revision.
> https://lore.kernel.org/all/af709ffa-eb11-4de5-9ae8-a179cb99750c@intel.com/
> 
> Mainly, x86 maintainers prefer imperative tone and references such as
> "previous commit" can be confusing sometimes.

Indeed, missed. My bad.

I've merged last two patches and updated the commit message:

https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?h=x86/lass

I hope it is still okay to use your Reviewed-by tag.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov