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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-11-27 23:34:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-03-12 22:33:13 +0100 |
| commit | 7c130d6911f5b09bfc648f6ae678c4c0749f61bb (patch) | |
| tree | b179530cc4fa15db10706aaf799f25231dcd91a1 | |
| parent | f669dd4dff83024ac80d79a4a5d7089902236a00 (diff) | |
| download | ffmpeg-7c130d6911f5b09bfc648f6ae678c4c0749f61bb.tar.gz | |
avcodec/mpeg12dec: Check input size
Fixes: Timeout
Fixes: 53599/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IPU_fuzzer-4950102511058944
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/mpeg12dec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index 457d985265..6c4cbccc59 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -2956,6 +2956,10 @@ static int ipu_decode_frame(AVCodecContext *avctx, AVFrame *frame, GetBitContext *gb = &m->gb; int ret; + // Check for minimal intra MB size (considering mb header, luma & chroma dc VLC, ac EOB VLC) + if (avpkt->size*8LL < (avctx->width+15)/16 * ((avctx->height+15)/16) * (2 + 3*4 + 2*2 + 2*6)) + return AVERROR_INVALIDDATA; + ret = ff_get_buffer(avctx, frame, 0); if (ret < 0) return ret; |