utils: Check for extradata size overflows.

2012-01-12 11:12:24 -08:00
parent 81dc6a2a3c
commit 4df30f7114
3 changed files with 13 additions and 1 deletions
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -610,6 +610,9 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVD
    int ret = 0;
    AVDictionary *tmp = NULL;

+    if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
+        return AVERROR(EINVAL);
+
    if (options)
        av_dict_copy(&tmp, *options, 0);