From 9a222f140e2674ac936b2f41c480487bc666dd95 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Mon, 13 Sep 2021 23:04:13 +0200
Subject: avformat/mov: Check for duplicate clli

Fixes: memleak
Fixes: 35261/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-4869656287510528

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mov.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libavformat')

diff --git a/libavformat/mov.c b/libavformat/mov.c
index c5583e07c7..4bc42d6b20 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -5485,6 +5485,11 @@ static int mov_read_clli(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         return AVERROR_INVALIDDATA;
     }
 
+    if (sc->coll){
+        av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicate CLLI/COLL\n");
+        return 0;
+    }
+
     sc->coll = av_content_light_metadata_alloc(&sc->coll_size);
     if (!sc->coll)
         return AVERROR(ENOMEM);
-- 
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