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: <9DE71214-283C-4410-B5A4-22DFDA7021F4@suse.de>
Date:   Wed, 15 Feb 2023 00:16:03 +0800
From:   Coly Li <colyli@...e.de>
To:     Thomas Weißschuh <linux@...ssschuh.net>
Cc:     Kent Overstreet <kent.overstreet@...il.com>,
        linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bcache: make kobj_type structures constant



> 2023年2月14日 23:21,Thomas Weißschuh <linux@...ssschuh.net> 写道:
> 
> On Tue, Feb 14, 2023 at 05:51:09PM +0800, Coly Li wrote:
>> 
>> 
>>> 2023年2月14日 11:13,Thomas Weißschuh <linux@...ssschuh.net> 写道:
>>> 
>>> Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
>>> the driver core allows the usage of const struct kobj_type.
>>> 
>>> Take advantage of this to constify the structure definitions to prevent
>>> modification at runtime.
>>> 
>> 
>> How the const structure definition can prevent modification at run time?
> 
> It will be put into .rodata instead of .data by the compiler.
> The .rodata section is mapped as read-only via the pagetable.
> 
> See Documentation/security/self-protection.rst
> "Function pointers and sensitive variables must not be writable".

I see. Thanks for the information.

This patch will be added into my testing queue, and submitted later.

Coly Li

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ