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Code Issues Releases Activity

avcodec/ffv1dec: consider run increase in minimal golomb frame size

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Fixes: Timeout
Fixes: 49160/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_fuzzer-5672826144686080

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-07-19 01:25:01 +02:00
parent 3592b05c84
commit 15785e044e
1 changed files with 4 additions and 1 deletions
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5
libavcodec/ffv1dec.c
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@ -883,7 +883,10 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe,
if (buf_size < avctx->width * avctx->height / (128*8))
return AVERROR_INVALIDDATA;
} else {
if (buf_size < avctx->height / 8)
int w = avctx->width;
for (int i = 0; w > (1<<ff_log2_run[i]); i++)
w -= ff_log2_run[i];
if (buf_size < (avctx->height + i + 6)/ 8)
return AVERROR_INVALIDDATA;
}