linux-kernel - Re: [PATCH v10 12/40] mm: Define VM_SHADOW

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: <34f7a5378447b1a8d5a9561594b37cfeaa6bd2b1.camel@intel.com>
Date: Thu, 15 Aug 2024 15:20:52 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "corbet@....net" <corbet@....net>, "ardb@...nel.org" <ardb@...nel.org>,
	"maz@...nel.org" <maz@...nel.org>, "shuah@...nel.org" <shuah@...nel.org>,
	"Szabolcs.Nagy@....com" <Szabolcs.Nagy@....com>, "james.morse@....com"
	<james.morse@....com>, "debug@...osinc.com" <debug@...osinc.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"catalin.marinas@....com" <catalin.marinas@....com>, "oleg@...hat.com"
	<oleg@...hat.com>, "arnd@...db.de" <arnd@...db.de>, "ebiederm@...ssion.com"
	<ebiederm@...ssion.com>, "will@...nel.org" <will@...nel.org>,
	"suzuki.poulose@....com" <suzuki.poulose@....com>, "kees@...nel.org"
	<kees@...nel.org>, "oliver.upton@...ux.dev" <oliver.upton@...ux.dev>,
	"broonie@...nel.org" <broonie@...nel.org>
CC: "brauner@...nel.org" <brauner@...nel.org>, "ross.burton@....com"
	<ross.burton@....com>, "fweimer@...hat.com" <fweimer@...hat.com>,
	"aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"paul.walmsley@...ive.com" <paul.walmsley@...ive.com>, "hjl.tools@...il.com"
	<hjl.tools@...il.com>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
	"palmer@...belt.com" <palmer@...belt.com>, "kvmarm@...ts.linux.dev"
	<kvmarm@...ts.linux.dev>, "linux-arch@...r.kernel.org"
	<linux-arch@...r.kernel.org>, "thiago.bauermann@...aro.org"
	<thiago.bauermann@...aro.org>, "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-fsdevel@...r.kernel.org"
	<linux-fsdevel@...r.kernel.org>, "linux-kselftest@...r.kernel.org"
	<linux-kselftest@...r.kernel.org>, "linux-riscv@...ts.infradead.org"
	<linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we
 support GCS

On Thu, 2024-08-01 at 13:06 +0100, Mark Brown wrote:
> Use VM_HIGH_ARCH_5 for guarded control stack pages.

FYI - If you want to have more complete guard gaps, you need to do this for arm
too:
https://lore.kernel.org/linux-mm/20240326021656.202649-14-rick.p.edgecombe@intel.com/

Using VM_SHADOW_STACK only gets you part of the way there.