audio_route: add check on enum valuesandroid-7.1.2_r9android-7.1.2_r8android-7.1.2_r6android-7.1.2_r5android-7.1.2_r4android-7.1.2_r36android-7.1.2_r33android-7.1.2_r32android-7.1.2_r30android-7.1.2_r3android-7.1.2_r29android-7.1.2_r28android-7.1.2_r27android-7.1.2_r25android-7.1.2_r24android-7.1.2_r23android-7.1.2_r2android-7.1.2_r19android-7.1.2_r18android-7.1.2_r17android-7.1.2_r16android-7.1.2_r15android-7.1.2_r14android-7.1.2_r13android-7.1.2_r12android-7.1.2_r11android-7.1.2_r10android-7.1.2_r1nougat-mr2.3-releasenougat-mr2.2-releasenougat-mr2.1-releasenougat-mr2-releasenougat-mr2-pixel-releasenougat-mr2-dev

am: ff3e6f401e

Change-Id: I4a9cfe96aac7472dde381cbb8756353d3cd128f2

1 files changed, 13 insertions, 2 deletions

diff --git a/audio_route/audio_route.c b/audio_route/audio_route.c
index 90b114d5..bd5c1124 100644
--- a/audio_route/audio_route.c
+++ b/audio_route/audio_route.c
@@ -420,13 +420,24 @@ static int path_reset(struct audio_route *ar, struct mixer_path *path)
 static int mixer_enum_string_to_value(struct mixer_ctl *ctl, const char *string)
 {
     unsigned int i;
+    unsigned int num_values = mixer_ctl_get_num_enums(ctl);
+
+    if (string == NULL) {
+        ALOGE("NULL enum value string passed to mixer_enum_string_to_value() for ctl %s",
+              mixer_ctl_get_name(ctl));
+        return 0;
+    }
 
     /* Search the enum strings for a particular one */
-    for (i = 0; i < mixer_ctl_get_num_enums(ctl); i++) {
+    for (i = 0; i < num_values; i++) {
         if (strcmp(mixer_ctl_get_enum_string(ctl, i), string) == 0)
             break;
     }
-
+    if (i == num_values) {
+        ALOGE("unknown enum value string %s for ctl %s",
+              string, mixer_ctl_get_name(ctl));
+        return 0;
+    }
     return i;
 }