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mxfdec: check index_tables before dereferencing in close.
Fixes null pointer dereference Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -2250,10 +2250,12 @@ static int mxf_read_close(AVFormatContext *s)
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av_freep(&mxf->aesc);
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av_freep(&mxf->local_tags);
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for (i = 0; i < mxf->nb_index_tables; i++) {
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av_freep(&mxf->index_tables[i].segments);
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av_freep(&mxf->index_tables[i].ptses);
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av_freep(&mxf->index_tables[i].fake_index);
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if (mxf->index_tables) {
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for (i = 0; i < mxf->nb_index_tables; i++) {
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av_freep(&mxf->index_tables[i].segments);
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av_freep(&mxf->index_tables[i].ptses);
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av_freep(&mxf->index_tables[i].fake_index);
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}
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}
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av_freep(&mxf->index_tables);
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