[PATCH v2 1/3] lib: parse_area_spec: don't modify *start value if parse failed

[Peter Mamonov]

On Wed, Jan 17, 2018 at 09:11:12AM +0100, Sascha Hauer wrote:
> On Mon, Jan 15, 2018 at 02:32:31PM +0300, Peter Mamonov wrote:
> > Signed-off-by: Peter Mamonov <pmamonov at gmail.com>
> > ---
> >  lib/misc.c | 14 +++++++++-----
> >  1 file changed, 9 insertions(+), 5 deletions(-)
> > 
> > diff --git a/lib/misc.c b/lib/misc.c
> > index 62ddd6677..1767043d1 100644
> > --- a/lib/misc.c
> > +++ b/lib/misc.c
> > @@ -79,19 +79,19 @@ EXPORT_SYMBOL(strtoul_suffix);
> >  int parse_area_spec(const char *str, loff_t *start, loff_t *size)
> >  {
> >  	char *endp;
> > -	loff_t end;
> > +	loff_t end, _start;
> >  
> >  	if (!isdigit(*str))
> >  		return -1;
> >  
> > -	*start = strtoull_suffix(str, &endp, 0);
> > +	_start = strtoull_suffix(str, &endp, 0);
> >  
> >  	str = endp;
> >  
> >  	if (!*str) {
> >  		/* beginning given, but no size, assume maximum size */
> >  		*size = ~0;
> > -		return 0;
> > +		goto success;
> >  	}
> >  
> >  	if (*str == '-') {
> > @@ -102,15 +102,19 @@ int parse_area_spec(const char *str, loff_t *start, loff_t *size)
> >  			return -1;
> >  		}
> >  		*size = end - *start + 1;
> 
> Applied with two little changes: It must be _start above and in another
> case not visible in the patch. *start is not yet initialized.

Thanks for correction. Actually these changes were present in the original
patch, but I've missed them while rearranging it.

Regards,
Peter

> 
> Sascha
> 
> 
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