[FFmpeg-cvslog] avformat/mxfdec: Use 64bit in remainder
Michael Niedermayer
git at videolan.org
Thu Feb 23 23:20:32 EET 2023
ffmpeg | branch: release/5.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun Dec 25 22:02:13 2022 +0100| [87e6221d5327c74dfca652f7e64fed138163c3f4] | committer: Michael Niedermayer
avformat/mxfdec: Use 64bit in remainder
Fixes: signed integer overflow: 48000 * 223587 cannot be represented in type 'int'
Fixes: 54513/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5817594836025344
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git at haerdin.se>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 64a04fc165d453fe49906b228ac16385eda28564)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=87e6221d5327c74dfca652f7e64fed138163c3f4
---
libavformat/mxfdec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 4a31490868..f6d79a3551 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -3783,8 +3783,8 @@ static int64_t mxf_compute_sample_count(MXFContext *mxf, AVStream *st,
if ((sample_rate.num / sample_rate.den) == 48000) {
return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
} else {
- int remainder = (sample_rate.num * time_base.num) %
- (time_base.den * sample_rate.den);
+ int64_t remainder = (sample_rate.num * (int64_t) time_base.num) %
+ ( time_base.den * (int64_t)sample_rate.den);
if (remainder)
av_log(mxf->fc, AV_LOG_WARNING,
"seeking detected on stream #%d with time base (%d/%d) and "
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