[Nouveau] [PATCH] drm/nouveau/hwmon: Uninitialized variables in sysfs

[Pierre Moreau]

Ping: this can still be an issue today as kstrtol() & co haven’t changed their
possible return value since the patch was written.

On 2017-07-22 — 14:13, Pierre Moreau wrote:
> Reviewed-by: Pierre Moreau <pierre.morrow at free.fr>
> 
> On 2017-07-17 — 11:17, Dan Carpenter wrote:
> > kstrtol() and friends can return -EINVAL or -ERANGE.  We have to test
> > for both, otherwise the value is possibly uninitialized.  Also in some
> > of these files we accidentally return "count" on error instead of a
> > negative error code.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> > 
> > diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> > index 7c965648df80..5e75af91c446 100644
> > --- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> > +++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> > @@ -68,9 +68,11 @@ nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
> >  	struct nouveau_drm *drm = nouveau_drm(dev);
> >  	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
> >  	long value;
> > +	int ret;
> >  
> > -	if (kstrtol(buf, 10, &value) == -EINVAL)
> > -		return count;
> > +	ret = kstrtol(buf, 10, &value);
> > +	if (ret)
> > +		return ret;
> >  
> >  	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST,
> >  			value / 1000);
> > @@ -101,9 +103,11 @@ nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
> >  	struct nouveau_drm *drm = nouveau_drm(dev);
> >  	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
> >  	long value;
> > +	int ret;
> >  
> > -	if (kstrtol(buf, 10, &value) == -EINVAL)
> > -		return count;
> > +	ret = kstrtol(buf, 10, &value);
> > +	if (ret)
> > +		return ret;
> >  
> >  	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST,
> >  			value / 1000);
> > @@ -156,8 +160,9 @@ nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
> >  	long value;
> >  	int ret;
> >  
> > -	if (kstrtol(buf, 10, &value) == -EINVAL)
> > -		return -EINVAL;
> > +	ret = kstrtol(buf, 10, &value);
> > +	if (ret)
> > +		return ret;
> >  
> >  	ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value);
> >  	if (ret < 0)
> > @@ -179,8 +184,9 @@ nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
> >  	long value;
> >  	int ret;
> >  
> > -	if (kstrtol(buf, 10, &value) == -EINVAL)
> > -		return -EINVAL;
> > +	ret = kstrtol(buf, 10, &value);
> > +	if (ret)
> > +		return ret;
> >  
> >  	ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value);
> >  	if (ret < 0)
> > _______________________________________________
> > Nouveau mailing list
> > Nouveau at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/nouveau



> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/nouveau

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