[FFmpeg-cvslog] avcodec/gdv: Check available space before reading palette
Michael Niedermayer
git at videolan.org
Sun Aug 13 02:05:45 EEST 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Aug 11 19:27:02 2017 +0200| [0561bd2fc2bff0dbe651d5998e9f129c43d25eb3] | committer: Michael Niedermayer
avcodec/gdv: Check available space before reading palette
Fixes: Timeout
Fixes: 2926/clusterfuzz-testcase-498711001458278
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=0561bd2fc2bff0dbe651d5998e9f129c43d25eb3
---
libavcodec/gdv.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/gdv.c b/libavcodec/gdv.c
index b324e4f26e..dc91869edf 100644
--- a/libavcodec/gdv.c
+++ b/libavcodec/gdv.c
@@ -427,6 +427,8 @@ static int gdv_decode_frame(AVCodecContext *avctx, void *data,
case 1:
memset(gdv->frame + PREAMBLE_SIZE, 0, gdv->frame_size - PREAMBLE_SIZE);
case 0:
+ if (bytestream2_get_bytes_left(gb) < 256*3)
+ return AVERROR_INVALIDDATA;
for (i = 0; i < 256; i++) {
unsigned r = bytestream2_get_byte(gb);
unsigned g = bytestream2_get_byte(gb);
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