[FFmpeg-devel] [PATCH 2/2] avformat/aiffdec: Use 64bit for block_duration use

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/2] avformat/aiffdec: Use 64bit for block_duration use
Date: Sat, 17 Sep 2022 16:32:09 +0200
Message-ID: <20220917143209.7797-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20220917143209.7797-1-michael@niedermayer.cc>

Fixes: signed integer overflow: 3 * -2147483648 cannot be represented in type 'int'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_AIFF_fuzzer-6668935979728896

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/aiffdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index 318e3ad742e..80733e58010 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -428,7 +428,7 @@ static int aiff_read_packet(AVFormatContext *s,
         pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     /* Only one stream in an AIFF file */
     pkt->stream_index = 0;
-    pkt->duration     = (res / st->codecpar->block_align) * aiff->block_duration;
+    pkt->duration     = (res / st->codecpar->block_align) * (int64_t) aiff->block_duration;
     return 0;
 }
 
-- 
2.17.1

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