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avcodec/dxv: Check that there is enough data to decompress
Fixes: Timeout Fixes: 10979/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXV_fuzzer-6178582203203584 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 2bc3811c0d6b34e43a55a7541722761f548628d0) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1192,6 +1192,12 @@ static int dxv_decode(AVCodecContext *avctx, void *data,
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ret = decompress_tex(avctx);
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if (ret < 0)
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return ret;
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{
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int w_block = avctx->coded_width / ctx->texture_block_w;
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int h_block = avctx->coded_height / ctx->texture_block_h;
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if (w_block * h_block * ctx->tex_step > ctx->tex_size * 8LL)
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return AVERROR_INVALIDDATA;
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}
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tframe.f = data;
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ret = ff_thread_get_buffer(avctx, &tframe, 0);
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