[FFmpeg-cvslog] avcodec/flicvideo: Check remaining bytes in FLI*COPY
Michael Niedermayer
git at videolan.org
Sun Sep 26 20:31:57 EEST 2021
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Sep 14 20:31:39 2021 +0200| [5f835efbca874ad42cb954e6788588f52a57a7a2] | committer: Michael Niedermayer
avcodec/flicvideo: Check remaining bytes in FLI*COPY
Fixes: Timeout
Fixes: 37795/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-4846536543043584
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=5f835efbca874ad42cb954e6788588f52a57a7a2
---
libavcodec/flicvideo.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index 47ca77f62e..e122fe231f 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -735,6 +735,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
bytestream2_skip(&g2, chunk_size - 6);
} else {
+ if (bytestream2_get_bytes_left(&g2) < 2 * s->avctx->width * s->avctx->height )
+ return AVERROR_INVALIDDATA;
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
y_ptr += s->frame->linesize[0]) {
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