linux-kernel - Re: [PATCH v9 01/26] mm: helper `is_shadow_stack

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: <5708c19d-240a-466a-b17a-d51b26ab95e6@sirena.org.uk>
Date: Fri, 7 Feb 2025 20:06:59 +0000
From: Mark Brown <broonie@...nel.org>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Deepak Gupta <debug@...osinc.com>, 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>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Conor Dooley <conor@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Christian Brauner <brauner@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Eric Biederman <ebiederm@...ssion.com>, Kees Cook <kees@...nel.org>,
	Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>,
	Jann Horn <jannh@...gle.com>, Conor Dooley <conor+dt@...nel.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org,
	alistair.francis@....com, richard.henderson@...aro.org,
	jim.shu@...ive.com, andybnac@...il.com, kito.cheng@...ive.com,
	charlie@...osinc.com, atishp@...osinc.com, evan@...osinc.com,
	cleger@...osinc.com, alexghiti@...osinc.com,
	samitolvanen@...gle.com, rick.p.edgecombe@...el.com
Subject: Re: [PATCH v9 01/26] mm: helper `is_shadow_stack_vma` to check
 shadow stack vma

On Fri, Feb 07, 2025 at 10:27:10AM +0100, Vlastimil Babka wrote:
> On 2/5/25 02:21, Deepak Gupta wrote:
> > VM_SHADOW_STACK (alias to VM_HIGH_ARCH_5) is used to encode shadow stack

> I see that arm GCS uses VM_HIGH_ARCH_6.

That'll be bitrot in the changelog, it was originally VM_HIGH_ARCH_5 on
arm64 as well but we had to renumber due to the addition of
VM_MTE_ALLOWED while the GCS series was on the list.  The changelog just
shouldn't mention VM_HIGH_ARCH_x, it's not particularly relevant here.

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)