[FFmpeg-cvslog] avformat/tmv: Check video chunk size
Michael Niedermayer
git at videolan.org
Mon Oct 16 03:25:45 EEST 2023
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Oct 9 00:07:32 2023 +0200| [b79fc7059600b28dce392fc20e5c8bd554c2fc95] | committer: Michael Niedermayer
avformat/tmv: Check video chunk size
This check matches the audio chunk check
Fixes: Timeout
Fixes: 62681/clusterfuzz-testcase-minimized-ffmpeg_dem_TMV_fuzzer-5299107876700160
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b79fc7059600b28dce392fc20e5c8bd554c2fc95
---
libavformat/tmv.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/tmv.c b/libavformat/tmv.c
index ea39954190..18105f764e 100644
--- a/libavformat/tmv.c
+++ b/libavformat/tmv.c
@@ -103,6 +103,10 @@ static int tmv_read_header(AVFormatContext *s)
char_cols = avio_r8(pb);
char_rows = avio_r8(pb);
tmv->video_chunk_size = char_cols * char_rows * 2;
+ if (!tmv->video_chunk_size) {
+ av_log(s, AV_LOG_ERROR, "invalid video chunk size\n");
+ return AVERROR_INVALIDDATA;
+ }
features = avio_r8(pb);
if (features & ~(TMV_PADDING | TMV_STEREO)) {
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