On Tue, Aug 31, 2010 at 18:08 +0200, Julia Lawall wrote:
> On Tue, 31 Aug 2010, walter harms wrote:
>
> >
> >
> > Julia Lawall schrieb:
> > > Add a call to of_node_put in the error handling code following a call to
> > > of_find_node_by_path.
[...]
> > > --- a/drivers/macintosh/via-pmu-led.c
> > > +++ b/drivers/macintosh/via-pmu-led.c
> > > @@ -92,8 +92,10 @@ static int __init via_pmu_led_init(void)
> > > if (dt == NULL)
> > > return -ENODEV;
> > > model = of_get_property(dt, "model", NULL);
> > > - if (model == NULL)
> > > + if (model == NULL) {
> > > + of_node_put(dt);
> > > return -ENODEV;
> > > + }
> > > if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
> > > strncmp(model, "iBook", strlen("iBook")) != 0 &&
> > > strcmp(model, "PowerMac7,2") != 0 &&
> > >
> >
> > is there any rule that says when to use strncmp ? it seems perfecly valid
> > to use strcpy here
> > (what is done in the last cmp).
>
> Perhaps there are some characters after eg PowerBook that one doesn't want
> to compare with?
It seems to me that model has no '\0' in the end. If model is got from
the hardware then we should double check it - maybe harware is buggy.
Otherwise we'll overflow model.
But why strcmp(model, "PowerMac7,2")? IMO it should be replaced
with strncmp().
--
Vasiliy
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