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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-11-23 21:27:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-12-08 17:48:21 +0100 |
| commit | a9d15d43eb0f976b982bf2ad6ec1d8ac084c7ded (patch) | |
| tree | fefaa7bc35238f91eb6b507d30f8154e792b5c24 | |
| parent | 2401494e96446c7f9cedf73cee548932db0a6e2a (diff) | |
| download | ffmpeg-a9d15d43eb0f976b982bf2ad6ec1d8ac084c7ded.tar.gz | |
avcodec/vqcdec: Check width & 15
Various parts of the code assume that width can be divided by various powers of 2
without rounding
Fixes: out of array access
Fixes: 53623/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VQC_fuzzer-6209269924233216
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vqcdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/vqcdec.c b/libavcodec/vqcdec.c index 18cd99462e..c3bce87974 100644 --- a/libavcodec/vqcdec.c +++ b/libavcodec/vqcdec.c @@ -71,6 +71,9 @@ static av_cold int vqc_decode_init(AVCodecContext * avctx) static AVOnce init_static_once = AV_ONCE_INIT; VqcContext *s = avctx->priv_data; + if (avctx->width & 15) + return AVERROR_PATCHWELCOME; + s->vectors = av_malloc((avctx->width * avctx->height * 3) / 2); if (!s->vectors) return AVERROR(ENOMEM); |