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[FFmpeg-devel,08/13] avformat/xwma: Use av_rescale() for duration computation

Message ID 20220918171410.31835-8-michael@niedermayer.cc
State Accepted
Commit 2c789f753c3657be9041307f9c03749f5ba5a6bb
Headers show
Series [FFmpeg-devel,01/13] avformat/flvdec: Use 64bit for sum_flv_tag_size | expand

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Commit Message

Michael Niedermayer Sept. 18, 2022, 5:14 p.m. UTC 
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>
---
 libavformat/xwma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/libavformat/xwma.c b/libavformat/xwma.c
index c16ff1be634..12689f37fd7 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: