From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/5] avformat/concatdec: Clip duration in one more case in get_best_effort_duration()
Date: Sun, 13 Jul 2025 03:10:27 +0200
Message-ID: <20250713011030.1156550-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20250713011030.1156550-1-michael@niedermayer.cc>
Fixes: signed integer overflow: 40000 - -9223372036854770000 cannot be represented in type 'long'
Fixes: 427262541/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-4831506940100608
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/concatdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index fe65d0c7688..e0c2c872482 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -326,7 +326,7 @@ static int64_t get_best_effort_duration(ConcatFile *file, AVFormatContext *avf)
if (file->outpoint != AV_NOPTS_VALUE)
return av_sat_sub64(file->outpoint, file->file_inpoint);
if (avf->duration > 0)
- return avf->duration - (file->file_inpoint - file->file_start_time);
+ return av_sat_sub64(avf->duration, file->file_inpoint - file->file_start_time);
if (file->next_dts != AV_NOPTS_VALUE)
return file->next_dts - file->file_inpoint;
return AV_NOPTS_VALUE;
--
2.49.0
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next prev parent reply other threads:[~2025-07-13 1:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-13 1:10 [FFmpeg-devel] [PATCH 1/5] avformat/flvdec: Check for EOF in AudioPacketTypeMultichannelConfig Michael Niedermayer
2025-07-13 1:10 ` Michael Niedermayer [this message]
2025-07-13 1:10 ` [FFmpeg-devel] [PATCH 3/5] avcodec/h264chroma_template: Replace variable by constant in chroma mc Michael Niedermayer
2025-07-13 1:10 ` [FFmpeg-devel] [PATCH 4/5] avcodec/mpegvideo_dec: Fix lowres=3 field select interlaced mpeg4 frame Michael Niedermayer
2025-07-13 17:34 ` Andreas Rheinhardt
2025-07-13 1:10 ` [FFmpeg-devel] [PATCH 5/5] avcodec/osq: Fix 32bit sample overflow Michael Niedermayer
2025-07-13 17:37 ` Andreas Rheinhardt
2025-07-13 11:42 ` [FFmpeg-devel] [PATCH 1/5] avformat/flvdec: Check for EOF in AudioPacketTypeMultichannelConfig Timo Rothenpieler
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