linux-kernel - Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file

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Message-ID: <alpine.DEB.2.20.10.1604061152180.13127@trent.utfs.org>
Date:	Wed, 6 Apr 2016 11:52:30 -0700 (PDT)
From:	Christian Kujau <lists@...dbynature.de>
To:	ed@...sec.com
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dan Rosenberg <dan.j.rosenberg@...il.com>,
	Dave Jones <davej@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Kernel Hardening <kernel-hardening@...ts.openwall.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem
 file

On Wed, 6 Apr 2016, ed@...sec.com wrote:
> First, I wrote your attached patch, but then I thought zeroing other
> /proc/iomem values would be better. So I changed it.

On my systems, /proc/iomem, /proc/ioports and others get their 
world-readable bits removed during bootup - I guess that would mitigate 
this issue too?

Christian.
-- 
BOFH excuse #184:

loop found in loop in redundant loopback