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avformat/mov: Disallow empty sidx
It appears this is not allowed "Each Segment Index box documents how a (sub)segment is divided into one or more subsegments
(which may themselves be further subdivided using Segment Index boxes)."
Fixes: Null pointer dereference
Fixes: Ticket9517
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4419433d77
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -4357,7 +4357,7 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
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index->track_id = track_id;
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index->track_id = track_id;
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index->item_count = avio_rb16(pb);
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index->item_count = avio_rb16(pb);
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index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
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index->items = index->item_count ? av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem)) : NULL;
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if (!index->items) {
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if (!index->items) {
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av_freep(&index);
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av_freep(&index);
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