[FFmpeg-cvslog] avcodec/vqavideo: reset accounting on error
Michael Niedermayer
git at videolan.org
Sat Apr 23 18:45:02 EEST 2022
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Dec 19 22:26:00 2021 +0100| [357c339a84d2c340677bd5923b678221f227b36c] | committer: Michael Niedermayer
avcodec/vqavideo: reset accounting on error
Fixes: Timeout (same growing chunk is decoded to failure repeatedly)
Fixes: 42582/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VQA_fuzzer-6531195591065600
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit d8ea7a67ba62f5d4520e75e56b9954d80e7ff223)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=357c339a84d2c340677bd5923b678221f227b36c
---
libavcodec/vqavideo.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libavcodec/vqavideo.c b/libavcodec/vqavideo.c
index 0e42cbb254..fa4cf2c880 100644
--- a/libavcodec/vqavideo.c
+++ b/libavcodec/vqavideo.c
@@ -592,13 +592,14 @@ static int vqa_decode_chunk(VqaContext *s, AVFrame *frame)
if (s->partial_countdown <= 0) {
bytestream2_init(&s->gb, s->next_codebook_buffer, s->next_codebook_buffer_index);
/* decompress codebook */
- if ((res = decode_format80(s, s->next_codebook_buffer_index,
- s->codebook, s->codebook_size, 0)) < 0)
- return res;
+ res = decode_format80(s, s->next_codebook_buffer_index,
+ s->codebook, s->codebook_size, 0);
/* reset accounting */
s->next_codebook_buffer_index = 0;
s->partial_countdown = s->partial_count;
+ if (res < 0)
+ return res;
}
}
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