[FFmpeg-cvslog] avformat/kvag: Fix integer overflow in bitrate computation

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Oct 10 17:31:50 2020 +0200| [7ac87a2c34bea97dd87208b1ba7384dfbdea2a04] | committer: Michael Niedermayer

avformat/kvag: Fix integer overflow in bitrate computation

Fixes: signed integer overflow: 1077952576 * 4 cannot be represented in type 'int'
Fixes: 26152/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5674758518341632

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7ac87a2c34bea97dd87208b1ba7384dfbdea2a04
---

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

diff --git a/libavformat/kvag.c b/libavformat/kvag.c
index 0a11fc0556..8f641873b9 100644
--- a/libavformat/kvag.c
+++ b/libavformat/kvag.c
@@ -83,7 +83,7 @@ static int kvag_read_header(AVFormatContext *s)
     par->bits_per_raw_sample    = 16;
     par->block_align            = 1;
     par->bit_rate               = par->channels *
-                                  par->sample_rate *
+                                  (uint64_t)par->sample_rate *
                                   par->bits_per_coded_sample;
 
     avpriv_set_pts_info(st, 64, 1, par->sample_rate);