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avcodec/svq3: Check for minimum size input

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Fixes: Timeout
Fixes: 71295/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SVQ3_fuzzer-4999941125111808

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 050b5e85cb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-09-22 20:31:58 +02:00
parent 8d3f10011d
commit ab42cdfd0e
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1 changed files with 3 additions and 0 deletions
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3
libavcodec/svq3.c
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@ -1439,6 +1439,9 @@ static int svq3_decode_frame(AVCodecContext *avctx, void *data,
if (svq3_decode_slice_header(avctx))
return -1;
if (avpkt->size < s->mb_width * s->mb_height / 8)
return AVERROR_INVALIDDATA;
s->pict_type = s->slice_type;
if (s->pict_type != AV_PICTURE_TYPE_B)