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

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Thu May 23 02:27:28 2024 +0200| [2cca78ee6886ae1e78f9e35258f313ee2d409b6a] | 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>
(cherry picked from commit 70b499476213a198ac0f39450cddaea4b34662f5)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2cca78ee6886ae1e78f9e35258f313ee2d409b6a
---

 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 599dfe384d..31794af4b4 100644
--- a/libavformat/asfdec_f.c
+++ b/libavformat/asfdec_f.c
@@ -768,7 +768,7 @@ static int asf_read_marker(AVFormatContext *s, int64_t size)
 
         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