From: James Almer <jamrial@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH] avformat/mov: ensure no trun atoms are parsed as children of trak
Date: Thu, 13 Feb 2025 12:52:32 -0300
Message-ID: <20250213155232.59-1-jamrial@gmail.com> (raw)
Fixes: Null-dereference READ
Fixes: 396192874/clusterfuzz-testcase-minimized-audio_decoder_fuzzer-4589309789143040
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavformat/mov.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 85aef33b19..f675929e57 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -5097,6 +5097,12 @@ static int sanity_checks(void *log_obj, MOVStreamContext *sc, int index)
return 1;
}
+ if (sc->tts_count) {
+ av_log(log_obj, AV_LOG_ERROR, "stream %d, TRUN atom in TRAK, broken header\n",
+ index);
+ return 1;
+ }
+
if (sc->stsc_count && sc->stsc_data[ sc->stsc_count - 1 ].first > sc->chunk_count) {
av_log(log_obj, AV_LOG_ERROR, "stream %d, contradictionary STSC and STCO\n",
index);
--
2.48.1
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