[FFmpeg-devel] [PATCH] avformat/iamfdec: check nb_streams in header read

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avformat/iamfdec: check nb_streams in header read
Date: Sat, 27 Apr 2024 20:51:45 +0200
Message-ID: <20240427185145.1458898-1-michael@niedermayer.cc> (raw)

Fixes: Assertion pkt->stream_index < (unsigned)s->nb_streams && "Invalid stream index.\n" failed at libavformat/demux.c:572
Fixes: 67890/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-5166340789829632.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/iamfdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/iamfdec.c b/libavformat/iamfdec.c
index e34d13e74c5..ce6d4aa0647 100644
--- a/libavformat/iamfdec.c
+++ b/libavformat/iamfdec.c
@@ -154,6 +154,9 @@ static int iamf_read_header(AVFormatContext *s)
         }
     }
 
+    if (!s->nb_streams)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }
 
-- 
2.43.2

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