Re: [PATCH] Fix buffer overflow in config parser

[Markus Heidelberg <markus.heidelberg@web.de>]

Markus Heidelberg, 09.04.2009:
> Thomas Jarosch, 09.04.2009:
> > Hello together,
> > 
> > attached is a small patch to fix a buffer overflow in config.c.
> > Patch is against git master's HEAD.
> > 
> > I didn't send this one inline as I wanted to
> > preserve the 1024+ byte long line.
> 
> You could send the patch inline and attach the example config.
> 
> > diff --git a/config.c b/config.c
> > index b76fe4c..a9c67e8 100644
> > --- a/config.c
> > +++ b/config.c
> > @@ -72,7 +72,7 @@ static char *parse_value(void)
> >                         }
> >                 }
> >                 if (space) {
> > -                       if (len)
> > +                       if (len && len < sizeof(value)-1)
> >                                 value[len++] = ' ';
> >                         space = 0;

Eh, or maybe better add a "continue;" here, so that only one char per
loop is read.

> >                 }