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Message-ID: <20150506142801.GA2780@openwall.com>
Date: Wed, 6 May 2015 17:28:01 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Undefined behavior in bench.c (null pointer passed as argument 1 to memcpy)
On Wed, May 06, 2015 at 02:29:03PM +0200, Frank Dittrich wrote:
> The only -fsanitize=undefined error I got from running the test suite
> for core john is now this one:
>
> BSDI_fmt.c:279:37: runtime error: left shift of negative value -21.
Patched:
http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/john/john/src/BSDI_fmt.c.diff?r1=1.26;r2=1.27
although I think we really should redefine ARCH_WORD to be unsigned,
introduce a separate signed equivalent (ARCH_SWORD?) for occasional uses
where that is needed (bitslice hash comparison comes to mind), and
introduce an ARCH_INDEX() like macro into common.h for generic
maybe-signed char to unsigned int conversion.
Alexander
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