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avcodec/truemotion1: Height not being a multiple of 4 is unsupported
mb_change_bits is given space based on height >> 2, while more data is read Fixes: out of array access Fixes: 62285/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION1_fuzzer-5201925062590464.fuzz 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 ebdcf9849905fdd67dcd3ab93e55e47ded35fda2) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -408,6 +408,11 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
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return AVERROR_PATCHWELCOME;
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}
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if (s->h & 3) {
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avpriv_request_sample(s->avctx, "Frame with height not being a multiple of 4");
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return AVERROR_PATCHWELCOME;
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}
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if (s->w != s->avctx->width || s->h != s->avctx->height ||
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new_pix_fmt != s->avctx->pix_fmt) {
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av_frame_unref(s->frame);
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