Gyan Doshi:
> Avoids overreading the box and ingesting absurd values into stts_data
> ---
>
> Fixes prolonged demuxing for fuzzer-generated files in the loop added in
> patch for max_stts_delta
>
> libavformat/mov.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index 2aed6e80ef..8d88119b29 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -2935,6 +2935,11 @@ static int mov_read_stts(MOVContext *c, AVIOContext
> *pb, MOVAtom atom)
> avio_rb24(pb); /* flags */
> entries = avio_rb32(pb);
>
> + if (atom.size < 8 + entries*8) {
This can overflow.
> + av_log(c->fc, AV_LOG_ERROR, "Truncated STTS box for st %d.\n",
> c->fc->nb_streams-1);
> + return AVERROR_INVALIDDATA;
> + }
> +
> av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
> c->fc->nb_streams-1, entries);
>
>
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