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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-03-20 03:30:56 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-03-25 21:41:26 +0100 |
| commit | 70b26b693e9e06bcd9fe83ee5063ee40e32ce02f (patch) | |
| tree | fc26b2f6cb06c02249ca50220fd6fd292ca050a2 | |
| parent | 3c43299e9e642e73b31be7ac7c49700949946e13 (diff) | |
| download | ffmpeg-70b26b693e9e06bcd9fe83ee5063ee40e32ce02f.tar.gz | |
avcodec/vmixdec: Check shift before use
Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int'
Fixes: 65909/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMIX_fuzzer-519459745831321
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vmixdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/vmixdec.c b/libavcodec/vmixdec.c index d6b6e3557f..ab283d13db 100644 --- a/libavcodec/vmixdec.c +++ b/libavcodec/vmixdec.c @@ -235,6 +235,9 @@ static int decode_frame(AVCodecContext *avctx, else if (offset != 3) return AVERROR_INVALIDDATA; + if (s->lshift > 31) + return AVERROR_INVALIDDATA; + q = quality[FFMIN(avpkt->data[offset - 2], FF_ARRAY_ELEMS(quality)-1)]; for (int n = 0; n < 64; n++) s->factors[n] = quant[n] * q; |