[FFmpeg-cvslog] avcodec/utils: Better check for channels in av_get_audio_frame_duration()

[Michael Niedermayer]

ffmpeg | branch: release/2.5 | Michael Niedermayer <michael at niedermayer.cc> | Sat Nov 14 01:35:08 2015 +0100| [72ac69bd05ef65221473766b62756749fb4f4456] | committer: Michael Niedermayer

avcodec/utils: Better check for channels in av_get_audio_frame_duration()

Fixes integer overflow
Fixes: 0c2625f236ced104d402b4a03c0d65c7/asan_generic_274e1ce_5990_9314e7a67c26aecf011b178ade9f217c.avi

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 4e16ad2868a1819de6680fc355a8eb20164adaea)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=72ac69bd05ef65221473766b62756749fb4f4456
---

 libavcodec/utils.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 0cc1f90..ad61ac3 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -3371,7 +3371,7 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
                 return frame_bytes * 8 / bps;
         }
 
-        if (ch > 0) {
+        if (ch > 0 && ch < INT_MAX/16) {
             /* calc from frame_bytes and channels */
             switch (id) {
             case AV_CODEC_ID_ADPCM_AFC: