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avformat/utils: avoid unsigned integer overflows

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This commit is contained in:
Paul B Mahol 2020-02-15 14:52:47 +01:00
parent dfb0b9370d
commit 96840e47de
1 changed files with 6 additions and 4 deletions
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10
libavformat/utils.c
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@ -4455,15 +4455,17 @@ void avformat_free_context(AVFormatContext *s)
if (s->oformat && s->oformat->priv_class && s->priv_data) if (s->oformat && s->oformat->priv_class && s->priv_data)
av_opt_free(s->priv_data); av_opt_free(s->priv_data);
for (i = s->nb_streams - 1; i >= 0; i--) for (i = 0; i < s->nb_streams; i++)
ff_free_stream(s, s->streams[i]); free_stream(&s->streams[i]);
s->nb_streams = 0;
for (i = 0; i < s->nb_programs; i++) {
for (i = s->nb_programs - 1; i >= 0; i--) {
av_dict_free(&s->programs[i]->metadata); av_dict_free(&s->programs[i]->metadata);
av_freep(&s->programs[i]->stream_index); av_freep(&s->programs[i]->stream_index);
av_freep(&s->programs[i]); av_freep(&s->programs[i]);
} }
s->nb_programs = 0;
av_freep(&s->programs); av_freep(&s->programs);
av_freep(&s->priv_data); av_freep(&s->priv_data);
while (s->nb_chapters--) { while (s->nb_chapters--) {