[FFmpeg-cvslog] vqavideo: check the version

[Luca Barbato]

ffmpeg | branch: release/1.1 | Luca Barbato <lu_zero at gentoo.org> | Thu Jun 27 03:19:05 2013 +0200| [fb1823e17807294ba0ab89b28f744ba73856009f] | committer: Luca Barbato

vqavideo: check the version

Prevent out of buffer write.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org
(cherry picked from commit c4abc9098cacb227dba39bac6aea16b2bceba0d0)

Signed-off-by: Luca Barbato <lu_zero at gentoo.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fb1823e17807294ba0ab89b28f744ba73856009f
---

 libavcodec/vqavideo.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libavcodec/vqavideo.c b/libavcodec/vqavideo.c
index 841210c..b4656b8 100644
--- a/libavcodec/vqavideo.c
+++ b/libavcodec/vqavideo.c
@@ -135,6 +135,17 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
 
     /* load up the VQA parameters from the header */
     s->vqa_version = s->avctx->extradata[0];
+    switch (s->vqa_version) {
+    case 1:
+    case 2:
+        break;
+    case 3:
+        av_log_missing_feature(avctx, "VQA Version 3", 0);
+        return AVERROR_PATCHWELCOME;
+    default:
+        av_log_missing_feature(avctx, "VQA Version", 1);
+        return AVERROR_PATCHWELCOME;
+    }
     s->width = AV_RL16(&s->avctx->extradata[6]);
     s->height = AV_RL16(&s->avctx->extradata[8]);
     if(av_image_check_size(s->width, s->height, 0, avctx)){