[FFmpeg-cvslog] avcodec/vqavideo: Check chunk size

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michaelni at gmx.at> | Wed May 13 00:41:38 2015 +0200| [96de4bbf38c29e35c7175fc2d23fc9aa1bec8952] | committer: Michael Niedermayer

avcodec/vqavideo: Check chunk size

Fixes CID1239154

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 8a62b80ce6c8e87e7937f9a5d68f83882c1c8da2)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=96de4bbf38c29e35c7175fc2d23fc9aa1bec8952
---

 libavcodec/vqavideo.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/vqavideo.c b/libavcodec/vqavideo.c
index 4dcebd4..bf55571 100644
--- a/libavcodec/vqavideo.c
+++ b/libavcodec/vqavideo.c
@@ -231,6 +231,12 @@ static int decode_format80(VqaContext *s, int src_size,
     unsigned char color;
     int i;
 
+    if (src_size < 0 || src_size > bytestream2_get_bytes_left(&s->gb)) {
+        av_log(s->avctx, AV_LOG_ERROR, "Chunk size %d is out of range\n",
+               src_size);
+        return AVERROR_INVALIDDATA;
+    }
+
     start = bytestream2_tell(&s->gb);
     while (bytestream2_tell(&s->gb) - start < src_size) {
         opcode = bytestream2_get_byte(&s->gb);