[FFmpeg-cvslog] asvdec: Verify the amount of extradata
Martin Storsjö
git at videolan.org
Fri Sep 20 12:58:51 CEST 2013
ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Thu Sep 19 15:14:56 2013 +0300| [f50803354c6acb4575379d7c54ca48ec5d36dd61] | committer: Martin Storsjö
asvdec: Verify the amount of extradata
The init function reads one byte of extradata.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org
Signed-off-by: Martin Storsjö <martin at martin.st>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f50803354c6acb4575379d7c54ca48ec5d36dd61
---
libavcodec/asvdec.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavcodec/asvdec.c b/libavcodec/asvdec.c
index 9f74abb..9ba2755 100644
--- a/libavcodec/asvdec.c
+++ b/libavcodec/asvdec.c
@@ -274,6 +274,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
int i;
+ if (avctx->extradata_size < 1) {
+ av_log(avctx, AV_LOG_ERROR, "No extradata provided\n");
+ return AVERROR_INVALIDDATA;
+ }
+
ff_asv_common_init(avctx);
init_vlcs(a);
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab);
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