ASoC: topology: Check widget kcontrols before deref

Validate the topology input before we dereference the pointer.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 5598e891b2b3..986b8b2f90fb 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -513,7 +513,7 @@ static void remove_widget(struct snd_soc_component *comp,
          */
         if (dobj->widget.kcontrol_type == SND_SOC_TPLG_TYPE_ENUM) {
                 /* enumerated widget mixer */
-                for (i = 0; i < w->num_kcontrols; i++) {
+                for (i = 0; w->kcontrols != NULL && i < w->num_kcontrols; i++) {
                         struct snd_kcontrol *kcontrol = w->kcontrols[i];
                         struct soc_enum *se =
                                 (struct soc_enum *)kcontrol->private_value;
@@ -530,7 +530,7 @@ static void remove_widget(struct snd_soc_component *comp,
                 }
         } else {
                 /* volume mixer or bytes controls */
-                for (i = 0; i < w->num_kcontrols; i++) {
+                for (i = 0; w->kcontrols != NULL && i < w->num_kcontrols; i++) {
                         struct snd_kcontrol *kcontrol = w->kcontrols[i];
 
                         if (dobj->widget.kcontrol_type