Changelog: Add metadata bitstream filters

[ffmpeg] / libavcodec / snowdec.c

diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c
index b74c468ce32cfbf88eaa474db663767fac4f42cd..13668c2105ee51af50a7ff2fdc0e4b8a22fdd8e7 100644 (file)
--- a/libavcodec/snowdec.c
+++ b/libavcodec/snowdec.c
@@ -394,9 +394,10 @@ static int decode_header(SnowContext *s){
     s->mv_scale       += get_symbol(&s->c, s->header_state, 1);
     s->qbias          += get_symbol(&s->c, s->header_state, 1);
     s->block_max_depth+= get_symbol(&s->c, s->header_state, 1);
-    if(s->block_max_depth > 1 || s->block_max_depth < 0){
+    if(s->block_max_depth > 1 || s->block_max_depth < 0 || s->mv_scale > 256U){
         av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);
         s->block_max_depth= 0;
+        s->mv_scale = 0;
         return AVERROR_INVALIDDATA;
     }
     if (FFABS(s->qbias) > 127) {