thermal: validate input parameters

Added sanity check to make sure that thermal zone
and cooling device exists.

Signed-off-by: Thomas Sujith <sujith.thomas@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/thermal/thermal.c b/drivers/thermal/thermal.c
index e782b3e7fcdb..5f1d318f0574 100644
--- a/drivers/thermal/thermal.c
+++ b/drivers/thermal/thermal.c
@@ -306,12 +306,23 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
 {
         struct thermal_cooling_device_instance *dev;
         struct thermal_cooling_device_instance *pos;
+        struct thermal_zone_device *pos1;
+        struct thermal_cooling_device *pos2;
         int result;
 
         if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
                 return -EINVAL;
 
-        if (!tz || !cdev)
+        list_for_each_entry(pos1, &thermal_tz_list, node) {
+                if (pos1 == tz)
+                        break;
+        }
+        list_for_each_entry(pos2, &thermal_cdev_list, node) {
+                if (pos2 == cdev)
+                        break;
+        }
+
+        if (tz != pos1 || cdev != pos2)
                 return -EINVAL;
 
         dev =