linux-kernel - Re: [RFC PATCH 1/2] modules: Make module_enable_x() independant of CONFIG_ARCH_HAS_STRICT_MODULE

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: <Yfw+ulJ9mAT2tvvn@bombadil.infradead.org>
Date:   Thu, 3 Feb 2022 12:44:42 -0800
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     "atomlin@...hat.com" <atomlin@...hat.com>,
        "linux-modules@...r.kernel.org" <linux-modules@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/2] modules: Make module_enable_x() independant of
 CONFIG_ARCH_HAS_STRICT_MODULE_RWX

On Thu, Feb 03, 2022 at 08:23:25PM +0000, Christophe Leroy wrote:
> module_enable_x() has nothing to do with CONFIG_ARCH_HAS_STRICT_MODULE_RWX
> allthough by coincidence architectures who need module_enable_x() are
> selection CONFIG_ARCH_HAS_STRICT_MODULE_RWX.
> 
> Enable module_enable_x() for everyone everytime. If an architecture
> already has module text set executable, it's a no-op.
> 
> Only check end boundary if CONFIG_STRICT_MODULE_RWX is set, and
> make sure we entirely get the last page when the boundary is not
> aligned. When CONFIG_STRICT_MODULE_RWX is not selected, it is not
> a big deal to have the start of data as executable.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>

Thanks!

Both patches look good to me! I can merge this once Aaron's
then your's and then Michal's KEXEC stuff gets merged.

  Luis