From 48b2e91f983246ae775c72357c2787632ad06ec8 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 18 Sep 2022 16:45:30 +0200
Subject: [PATCH] avformat/xwma: Use av_rescale() for duration computation
Fixes: signed integer overflow: 34242363648 * 538976288 cannot be represented in type 'long'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6577923913547776
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2c789f753c3657be9041307f9c03749f5ba5a6bb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/xwma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/xwma.c b/libavformat/xwma.c
index aedadcf140..6997d5420b 100644
--- a/libavformat/xwma.c
+++ b/libavformat/xwma.c
@@ -278,7 +278,7 @@ static int xwma_read_header(AVFormatContext *s)
* the total duration using the average bits per sample and the
* total data length.
*/
- st->duration = (size<<3) * st->codecpar->sample_rate / st->codecpar->bit_rate;
+ st->duration = av_rescale((size<<3), st->codecpar->sample_rate, st->codecpar->bit_rate);
}
fail: