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) {
+ 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);
--
2.33.0
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