linux-kernel - Re: [PATCH] kconfig: Avoid buffer underrun in choice input

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: <1303909958.3032.407.camel@localhost>
Date:	Wed, 27 Apr 2011 14:12:38 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Michal Marek <mmarek@...e.cz>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kbuild@...r.kernel.org, Roman Zippel <zippel@...ux-m68k.org>
Subject: Re: [PATCH] kconfig: Avoid buffer underrun in choice input

On Wed, 2011-04-27 at 13:19 +0200, Michal Marek wrote:
> On 23.4.2011 19:42, Ben Hutchings wrote:
> > commit 40aee729b350672c2550640622416a855e27938f ('kconfig: fix default
> > value for choice input') fixed some cases where kconfig would select
> > the wrong option from a choice with a single valid option and thus
> > enter an infinite loop.
> >
> > However, this broke the test for user input of the form 'N?', because
> > when kconfig selects the single valid option the input is zero-length
> > and the test will read the byte before the input buffer.  If this
> > happens to contain '?' (as it will in a mips build on Debian unstable
> > today) then kconfig again enters an infinite loop.
> >
> > Signed-off-by: Ben Hutchings<ben@...adent.org.uk>
> > Cc: stable@...nel.org [2.6.17+]
> > ---
> > Roman has failed to respond to this after 5 weeks and one reminder, so
> > please take it directly.
> 
> I applied this on 8th April, see
> http://www.spinics.net/lists/linux-kbuild/msg04431.html.

Sorry, I forgot that.

> Please check 
> linux-next before reposting patches next time, now I either have to 
> rewind the kconfig branch or let Linus merge it with a duplicate commit :-(.

But the fix belongs in this release (2.6.39), not the next.  So I looked
in Linus' tree.

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

Download attachment "signature.asc" of type "application/pgp-signature" (829 bytes)