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avcodec/speedhq: Check buf_size to be big enough for DC

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Fixes: Timeout
Fixes: 51919/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEDHQ_fuzzer-6023716480090112

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9184d3d7b6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-10-06 22:28:33 +02:00
parent 03758674e2
commit 0bc8a2c295
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1 changed files with 2 additions and 0 deletions
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libavcodec/speedhq.c
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@ -426,6 +426,8 @@ static int speedhq_decode_frame(AVCodecContext *avctx,
if (buf_size < 4 || avctx->width < 8 || avctx->width % 8 != 0)
return AVERROR_INVALIDDATA;
if (buf_size < avctx->width*avctx->height / 64 / 4)
return AVERROR_INVALIDDATA;
quality = buf[0];
if (quality >= 100) {