Re: [VALGRIND PATCH for nth_last patch series] Fix invalid memory access

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Hi,

On Wed, 21 Jan 2009, Junio C Hamano wrote:

> Johannes Schindelin <Johannes.Schindelin@xxxxxx> writes:
> 
> >  sha1_name.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/sha1_name.c b/sha1_name.c
> > index 4d10705..803f9d2 100644
> > --- a/sha1_name.c
> > +++ b/sha1_name.c
> > @@ -735,7 +735,7 @@ static int grab_nth_branch_switch(unsigned char *osha1, unsigned char *nsha1,
> >  	if ((target = strstr(match, " to ")) != NULL) {
> >  		len = target - match;
> >  		target += 4;
> > -		if (target[len] == '\n' && !strncmp(match, target, len))
> > +		if (len == strlen(target) && !strncmp(match, target, len))
> >  			return 0;
> >  	}
> >  	else
> 
> Actually, I think this patch to a884d0c (sha1_name: tweak @{-N} lookup,
> 2009-01-17) would make more sense.
> 
> -- >8 --
> Subject: [PATCH] Simplify parsing branch switching events in reflog
> 
> We only accept "checkout: moving from A to B" newer style reflog entries,
> in order to pick up A.  There is no point computing where B begins at
> after running strstr to locate " to ", nor adding 4 and then subtracting 4
> from the same pointer.

Yeah, you're right.

Ciao,
Dscho
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