X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fvmdaudio.c;h=dfbd49fd8408714fa61ec494a30ba59951ac4203;hb=5d9f44da460f781a1604d537d0555b78e29438ba;hp=e8c8a064c7dcd3edc70a2e4fa8bf826b16a7f702;hpb=ccef7a85d6491fb354a36970162fa0204217d8e7;p=ffmpeg

diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c
index e8c8a064c7d..dfbd49fd840 100644
--- a/libavcodec/vmdaudio.c
+++ b/libavcodec/vmdaudio.c
@@ -76,7 +76,9 @@ static av_cold int vmdaudio_decode_init(AVCodecContext *avctx)
         av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
         return AVERROR(EINVAL);
     }
-    if (avctx->block_align < 1 || avctx->block_align % avctx->channels) {
+    if (avctx->block_align < 1 || avctx->block_align % avctx->channels ||
+        avctx->block_align > INT_MAX - avctx->channels
+    ) {
         av_log(avctx, AV_LOG_ERROR, "invalid block align\n");
         return AVERROR(EINVAL);
     }
@@ -179,6 +181,9 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data,
     /* drop incomplete chunks */
     buf_size     = audio_chunks * s->chunk_size;
 
+    if (silent_chunks + audio_chunks >= INT_MAX / avctx->block_align)
+        return AVERROR_INVALIDDATA;
+
     /* get output buffer */
     frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) /
                         avctx->channels;