linux-kernel - Re: [RFC] LZO de/compression support

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: <200705291614.34504.dhazelton@enter.net>
Date:	Tue, 29 May 2007 16:14:34 -0400
From:	Daniel Hazelton <dhazelton@...er.net>
To:	"Nitin Gupta" <nitingupta910@...il.com>
Cc:	"Bret Towe" <magnade@...il.com>,
	lkml <linux-kernel@...r.kernel.org>, linux-mm-cc@...top.org,
	linuxcompressed-devel@...ts.sourceforge.net,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Richard Purdie" <richard@...nedhand.com>,
	"Satyam Sharma" <satyam.sharma@...il.com>
Subject: Re: [RFC] LZO de/compression support - take 6

On Tuesday 29 May 2007 01:58:43 Nitin Gupta wrote:
> On 5/29/07, Bret Towe <magnade@...il.com> wrote:
> > tested this on ppc and its still good
> >
> > is there any reason to bother with a test on amd64?
> > if there is I might be able to get to it tonight
>
> Yes, this test is desired on 'take 6'
> (In future I will append version to patch bz2)
>
> Thanks,
> Nitin

I added a few functions to my test-bed to see how well the LZO code coped with 
random input data. I'll extend my error checking so that it dumps all local 
variables at the first error, but for the time being I'm staring at a problem 
with what appears to be a double-free (in addition to lzo1x_decompress(_safe) 
screaming about overruns when I pass it the buffer of compressed, totally 
random data).

(I fill the buffer by doing a read from /dev/urandom, though I'll certainly 
change it to use random() if anyone thinks that'll make a difference)

I'll post the version with the random-data tests when I get the double-free 
solved. (I've looked and don't see how its happening)

DRH
-
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/