linux-kernel - Re: [PATCH] x86/mm: Refuse W^X violations

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] [day] [month] [year] [list]

Message-ID: <YwfQlDFKvN2pic7Y@worktop.programming.kicks-ass.net>
Date:   Thu, 25 Aug 2022 21:42:12 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Dave Hansen <dave.hansen@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] x86/mm: Refuse W^X violations

On Thu, Aug 25, 2022 at 11:16:12AM -0700, Kees Cook wrote:
> On Thu, Aug 25, 2022 at 02:23:31PM +0200, Peter Zijlstra wrote:
> > x86 has STRICT_*_RWX, but not even a warning when someone violates it.
> 
> Yes please. I assume this is only kernel pages? Doing this globally is
> nice too, but runs into annoying problems[1].

Yeah, this interface should only be used on kernel pages.