[FFmpeg-cvslog] avformat/mxfdec: check index entry array size

[Marton Balint]

ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Wed Dec 28 02:36:57 2022 +0100| [6aff3c5e434f91dee9f88541ad2ea73e03bbc583] | committer: Marton Balint

avformat/mxfdec: check index entry array size

Signed-off-by: Marton Balint <cus at passwd.hu>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6aff3c5e434f91dee9f88541ad2ea73e03bbc583
---

 libavformat/mxfdec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index fa58854fcd..d843802f28 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1198,11 +1198,15 @@ static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag,
 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
 {
     int i, length;
+    uint32_t nb_index_entries;
 
     if (segment->temporal_offset_entries)
         return AVERROR_INVALIDDATA;
 
-    segment->nb_index_entries = avio_rb32(pb);
+    nb_index_entries = avio_rb32(pb);
+    if (nb_index_entries > INT_MAX)
+        return AVERROR_INVALIDDATA;
+    segment->nb_index_entries = nb_index_entries;
 
     length = avio_rb32(pb);
     if(segment->nb_index_entries && length < 11)