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mxfdec: check index_tables before dereferencing in close.

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Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-01 20:15:02 +01:00
parent 7389bb12e6
commit 873049e6d8
1 changed files with 6 additions and 4 deletions
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10
libavformat/mxfdec.c
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@ -2250,10 +2250,12 @@ static int mxf_read_close(AVFormatContext *s)
av_freep(&mxf->aesc);
av_freep(&mxf->local_tags);
for (i = 0; i < mxf->nb_index_tables; i++) {
av_freep(&mxf->index_tables[i].segments);
av_freep(&mxf->index_tables[i].ptses);
av_freep(&mxf->index_tables[i].fake_index);
if (mxf->index_tables) {
for (i = 0; i < mxf->nb_index_tables; i++) {
av_freep(&mxf->index_tables[i].segments);
av_freep(&mxf->index_tables[i].ptses);
av_freep(&mxf->index_tables[i].fake_index);
}
}
av_freep(&mxf->index_tables);