From: Eduardo Valentin Date: Tue, 8 Nov 2016 05:08:58 +0000 (-0800) Subject: thermal: core: treat correctly the return value of *scanf calls X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=09544da9e8255ef0f3aafd1e7da067dd2b521b40;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git thermal: core: treat correctly the return value of *scanf calls This patch checks the return value of all calls to *scanf. The check is to simply match the number of expect inputs. The current code does not do any recovery in case the number of treated inputs are different than the expected. Therefore, keeping the same behavior. Cc: Zhang Rui Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui --- diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index f5b519a9f567..e2c4fc4904d6 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -874,7 +874,7 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_type) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) != 1) return -EINVAL; result = tz->ops->get_trip_type(tz, trip, &type); @@ -906,7 +906,7 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr, if (!tz->ops->set_trip_temp) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) return -EINVAL; if (kstrtoint(buf, 10, &temperature)) @@ -932,7 +932,7 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_temp) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) return -EINVAL; ret = tz->ops->get_trip_temp(tz, trip, &temperature); @@ -954,7 +954,7 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr, if (!tz->ops->set_trip_hyst) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) return -EINVAL; if (kstrtoint(buf, 10, &temperature)) @@ -984,7 +984,7 @@ trip_point_hyst_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_hyst) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) return -EINVAL; ret = tz->ops->get_trip_hyst(tz, trip, &temperature); @@ -999,7 +999,7 @@ passive_store(struct device *dev, struct device_attribute *attr, struct thermal_zone_device *tz = to_thermal_zone(dev); int state; - if (!sscanf(buf, "%d\n", &state)) + if (sscanf(buf, "%d\n", &state) != 1) return -EINVAL; /* sanity check: values below 1000 millicelcius don't make sense @@ -1457,7 +1457,7 @@ thermal_cooling_device_cur_state_store(struct device *dev, unsigned long state; int result; - if (!sscanf(buf, "%ld\n", &state)) + if (sscanf(buf, "%ld\n", &state) != 1) return -EINVAL; if ((long)state < 0)