[FFmpeg-cvslog] h264: check that execute_decode_slices() is not called too many times
Anton Khirnov
git at videolan.org
Mon Jan 6 16:45:30 CET 2014
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Thu Nov 28 10:54:35 2013 +0100| [9eef9eb3014b2ed9c3ff4aac510a9f04edb555cf] | committer: Anton Khirnov
h264: check that execute_decode_slices() is not called too many times
Fixes invalid reads.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable at libav.org
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9eef9eb3014b2ed9c3ff4aac510a9f04edb555cf
---
libavcodec/h264.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index c0dfa3d..7d49d48 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -4495,6 +4495,12 @@ static int execute_decode_slices(H264Context *h, int context_count)
H264Context *hx;
int i;
+ if (h->mb_y >= h->mb_height) {
+ av_log(h->avctx, AV_LOG_ERROR,
+ "Input contains more MB rows than the frame height.\n");
+ return AVERROR_INVALIDDATA;
+ }
+
if (h->avctx->hwaccel)
return 0;
if (context_count == 1) {
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