avformat/concatdec: Check file
Fixes: null pointer dereference Fixes: -stream_loop 1 -ss 00:00:05 -i zgclab/ffmpeg_crash/poc2 -codec:v copy -codec:a aac -y output.mp4 Found-by: Wang Dawei and Zhou Geng, from Zhongguancun Laboratory Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -639,6 +639,11 @@ static int concat_parse_script(AVFormatContext *avf)
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}
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}
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if (!file) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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if (file->inpoint != AV_NOPTS_VALUE && file->outpoint != AV_NOPTS_VALUE) {
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if (file->inpoint > file->outpoint ||
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file->outpoint - (uint64_t)file->inpoint > INT64_MAX)
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