[FFmpeg-cvslog] avformat/mccdec: Fix overflows in num/den

2021-09-08 Thread Michael Niedermayer 
ffmpeg | branch: release/4.4 | Michael Niedermayer  | 
Sat Apr 24 16:37:34 2021 +0200| [612472c64796d67a2a689e6d34d82dbe9cc494d6] | 
committer: Michael Niedermayer

avformat/mccdec: Fix overflows in num/den

Fixes: signed integer overflow: 6365816 * 1000 cannot be represented in type 
'int'
Fixes: 
29102/clusterfuzz-testcase-minimized-ffmpeg_dem_MCC_fuzzer-6737934184218624

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 
(cherry picked from commit ff05326081922059314b8927cf9bbc9c7e73458f)
Signed-off-by: Michael Niedermayer 

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=612472c64796d67a2a689e6d34d82dbe9cc494d6
---

 libavformat/mccdec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libavformat/mccdec.c b/libavformat/mccdec.c
index 2a0b7905a0..627471a1fe 100644
--- a/libavformat/mccdec.c
+++ b/libavformat/mccdec.c
@@ -127,8 +127,7 @@ static int mcc_read_header(AVFormatContext *s)
 num = strtol(rate_str, , 10);
 den = 1;
 if (df && !av_strncasecmp(df, "DF", 2)) {
-num *= 1000;
-den  = 1001;
+av_reduce(, , num * 1000LL, 1001, INT_MAX);
 }
 }
 

___
ffmpeg-cvslog mailing list
ffmpeg-cvslog@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog

To unsubscribe, visit link above, or email
ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".

[FFmpeg-cvslog] avformat/mccdec: Fix overflows in num/den

2021-06-18 Thread Michael Niedermayer 
ffmpeg | branch: master | Michael Niedermayer  | Sat 
Apr 24 16:37:34 2021 +0200| [ff05326081922059314b8927cf9bbc9c7e73458f] | 
committer: Michael Niedermayer

avformat/mccdec: Fix overflows in num/den

Fixes: signed integer overflow: 6365816 * 1000 cannot be represented in type 
'int'
Fixes: 
29102/clusterfuzz-testcase-minimized-ffmpeg_dem_MCC_fuzzer-6737934184218624

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ff05326081922059314b8927cf9bbc9c7e73458f
---

 libavformat/mccdec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libavformat/mccdec.c b/libavformat/mccdec.c
index a096ac6e93..10ed7c0dc1 100644
--- a/libavformat/mccdec.c
+++ b/libavformat/mccdec.c
@@ -127,8 +127,7 @@ static int mcc_read_header(AVFormatContext *s)
 num = strtol(rate_str, , 10);
 den = 1;
 if (df && !av_strncasecmp(df, "DF", 2)) {
-num *= 1000;
-den  = 1001;
+av_reduce(, , num * 1000LL, 1001, INT_MAX);
 }
 }
 

___
ffmpeg-cvslog mailing list
ffmpeg-cvslog@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog

To unsubscribe, visit link above, or email
ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".