[FFmpeg-cvslog] avcodec/apedec: Change avg to uint32_t

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Fri Dec  3 17:58:50 2021 +0100| [24f5e3a1915f150cac4b3eaab63b309d4d54b833] | committer: Michael Niedermayer

avcodec/apedec: Change avg to uint32_t

Fixes: Integer overflow
Fixes: 40973/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6739312704618496

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Suggested-by: Anton Khirnov <anton at khirnov.net>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 0ec75723a484405eb2f2ec2f9e58161b168ed8b0)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=24f5e3a1915f150cac4b3eaab63b309d4d54b833
---

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

diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index d05aa741ef..9e3756fc32 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -101,7 +101,7 @@ typedef struct APEFilter {
     int16_t *historybuffer; ///< filter memory
     int16_t *delay;         ///< filtered values
 
-    int avg;
+    uint32_t avg;
 } APEFilter;
 
 typedef struct APERice {