linux-kernel - Re: [kernel-hardening] Re: [PATCH] proc: restrict access to /proc/interrupts

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: <4EB83674.3040207@zytor.com>
Date:	Mon, 07 Nov 2011 11:50:12 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Eric Paris <eparis@...isplace.org>
CC:	Vasiliy Kulikov <segoon@...nwall.com>,
	kernel-hardening@...ts.openwall.com, Valdis.Kletnieks@...edu,
	linux-kernel@...r.kernel.org,
	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-security-module@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [kernel-hardening] Re: [PATCH] proc: restrict access to /proc/interrupts

On 11/07/2011 11:48 AM, Eric Paris wrote:
> On Mon, Nov 7, 2011 at 2:29 PM, Vasiliy Kulikov <segoon@...nwall.com> wrote:
>> On Mon, Nov 07, 2011 at 11:18 -0800, H. Peter Anvin wrote:
> 
>> As to procfs, I see no real need of adding mode/group mount option for
>> global procfs files (/proc/interrupts, /proc/stat, etc.) - it can be
>> done by distro specific init scripts (chown+chmod).  I don't mind
>> against such an option for the convenience, though.
> 
> While possible, the chmod+chown 'solutions' just aren't as simple as
> you pretend.  Every time one creates a chroot environment and mounts
> /proc it has be manually fixed there as well.  Same thing with a
> container.  Sure if /proc were something that was only ever mounted
> one time on a box it wouldn't be so bad, but that's not the case.....

Yes, for a filesystem that dynamically creates nodes, a static script
just doesn't work well.  Control options do, like we have for devpts for
example.

	-hpa

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/