[FFmpeg-cvslog] avformat/asfdec_f: Use 64bit for preroll computation

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu May 23 02:27:28 2024 +0200| [70b499476213a198ac0f39450cddaea4b34662f5] | committer: Michael Niedermayer

avformat/asfdec_f: Use 64bit for preroll computation

Fixes: CID1500342 Unintentional integer overflow

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=70b499476213a198ac0f39450cddaea4b34662f5
---

 libavformat/asfdec_f.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c
index fcc2b98a2c..2441cadb44 100644
--- a/libavformat/asfdec_f.c
+++ b/libavformat/asfdec_f.c
@@ -675,7 +675,7 @@ static int asf_read_marker(AVFormatContext *s)
 
         avio_rl64(pb);             // offset, 8 bytes
         pres_time = avio_rl64(pb); // presentation time
-        pres_time = av_sat_sub64(pres_time, asf->hdr.preroll * 10000);
+        pres_time = av_sat_sub64(pres_time, asf->hdr.preroll * 10000LL);
         avio_rl16(pb);             // entry length
         avio_rl32(pb);             // send time
         avio_rl32(pb);             // flags