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AW: [PATCH] fix for programmer error in file equality check due to pointer logic

From: Markus Schaber <m.schaber_at_codesys.com>
Date: Fri, 6 Dec 2013 15:23:50 +0000

Hi,

On closer analysis: The broken code still delivers the correct result, however, it always scans the whole files even if the first byte is different.

Good catch. I feel fortified in my love to static analysis...

Best regards

Markus Schaber

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> -----Ursprüngliche Nachricht-----
> Von: Markus Schaber [mailto:m.schaber_at_codesys.com]
> Gesendet: Freitag, 6. Dezember 2013 16:21
> An: Eric Lubin; dev_at_subversion.apache.org
> Betreff: AW: [PATCH] fix for programmer error in file equality check due to
> pointer logic
>
> Hi,
>
> I'm the author of said code, and feel ashamed that this bug slipped in.
>
> The patch looks okay, and somehow I wonder that the code ever worked and
> passed the tests. :-(
>
> Best regards
>
> Markus Schaber
>
> CODESYS® a trademark of 3S-Smart Software Solutions GmbH
>
> Inspiring Automation Solutions
>
> 3S-Smart Software Solutions GmbH
> Dipl.-Inf. Markus Schaber | Product Development Core Technology Memminger Str.
> 151 | 87439 Kempten | Germany Tel. +49-831-54031-979 | Fax +49-831-54031-50
>
> E-Mail: m.schaber@codesys.com | Web: http://www.codesys.com | CODESYS store:
> http://store.codesys.com CODESYS forum: http://forum.codesys.com
>
> Managing Directors: Dipl.Inf. Dieter Hess, Dipl.Inf. Manfred Werner | Trade
> register: Kempten HRB 6186 | Tax ID No.: DE 167014915
>
> > -----Ursprüngliche Nachricht-----
> > Von: Eric Lubin [mailto:eric_at_lubin.us]
> > Gesendet: Donnerstag, 5. Dezember 2013 21:22
> > An: dev_at_subversion.apache.org
> > Betreff: [PATCH] fix for programmer error in file equality check due
> > to pointer logic
> >
> >
> > [[[
> > * subversion/libsvn_subr/io.c
> > (contents_three_identical_p): Fixed incorrect pointer check against
> > NULL, when the purpose was actually to check the value stored at that
> > pointer for true or false ]]]
> >
Received on 2013-12-06 16:24:36 CET

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