iLBC: Handle a case of bad input data

webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c

Index: webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c b/webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c
index cacf3ace2895afe0cc7f6d5379d2f9d5cc90bd95..b2d0ef9183716a47704e57e2c0ba2a4066143d12 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c
@@ -24,7 +24,7 @@
  *  Construct decoded vector from codebook and gains.
  *---------------------------------------------------------------*/
 
-void WebRtcIlbcfix_CbConstruct(
+int WebRtcIlbcfix_CbConstruct(
     int16_t *decvector,  /* (o) Decoded vector */
     int16_t *index,   /* (i) Codebook indices */
     int16_t *gain_index,  /* (i) Gain quantization indices */
@@ -50,9 +50,12 @@ void WebRtcIlbcfix_CbConstruct(
   /* codebook vector construction and construction of total vector */
 
   /* Stack based */
-  WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen);
-  WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen);
-  WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen);
+  if (!WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen))
+    return 0;  // Failure.
+  if (!WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen))
+    return 0;  // Failure.
+  if (!WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen))
+    return 0;  // Failure.
 
   gainPtr = &gain[0];
   for (j=0;j<veclen;j++) {
@@ -63,5 +66,5 @@ void WebRtcIlbcfix_CbConstruct(
     decvector[j] = (int16_t)((a32 + 8192) >> 14);
   }
 
-  return;
+  return 1;  // Success.
 }