avformat/adxdec: check avctx->channels for invalid values

[ffmpeg.git] / libavformat / adxdec.c

diff --git a/libavformat/adxdec.c b/libavformat/adxdec.c
index e57d051..e7107ac 100644 (file)
--- a/libavformat/adxdec.c
+++ b/libavformat/adxdec.c
@@ -40,6 +40,11 @@ static int adx_read_packet(AVFormatContext *s, AVPacket *pkt)
     AVCodecContext *avctx = s->streams[0]->codec;
     int ret, size;
 
+    if (avctx->channels <= 0) {
+        av_log(s, AV_LOG_ERROR, "invalid number of channels %d\n", avctx->channels);
+        return AVERROR_INVALIDDATA;
+    }
+
     size = BLOCK_SIZE * avctx->channels;
 
     pkt->pos = avio_tell(s->pb);