From 64a04fc165d453fe49906b228ac16385eda28564 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 25 Dec 2022 22:02:13 +0100 Subject: [PATCH] avformat/mxfdec: Use 64bit in remainder MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Michael Niedermayer --- libavformat/mxfdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index e6118e141d..fa58854fcd 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -3857,8 +3857,8 @@ 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 "