ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | 
Sun Dec  5 22:19:05 2021 +0100| [f4f397ebc1c45c61c062d841e43f180882cf9946] | 
committer: Michael Niedermayer

avformat/mxfdec: Check for duplicate mxf_read_index_entry_array()

Fixes: memleak
Fixes: 
41596/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-6439060204290048

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjop...@acc.umu.se>
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
(cherry picked from commit 4f44a218e53cd92e64ba10a935bc1e7583c3e218)
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f4f397ebc1c45c61c062d841e43f180882cf9946
---

 libavformat/mxfdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index b8f83541c6..84ab0cefd7 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1092,6 +1092,9 @@ static int mxf_read_index_entry_array(AVIOContext *pb, 
MXFIndexTableSegment *seg
 {
     int i, length;
 
+    if (segment->temporal_offset_entries)
+        return AVERROR_INVALIDDATA;
+
     segment->nb_index_entries = avio_rb32(pb);
 
     length = avio_rb32(pb);

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