[FFmpeg-cvslog] avcodec/loco: Fix signed integer overflow in loco_get_rice()

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun  9 22:14:59 2020 +0200| [63d14168a50169aac480cb983ef7819317c2fb5c] | committer: Michael Niedermayer

avcodec/loco: Fix signed integer overflow in loco_get_rice()

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 22975/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LOCO_fuzzer-5658160970072064

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit aa88cdfd90f5da0683cd6556c75a5ba5740a1c27)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=63d14168a50169aac480cb983ef7819317c2fb5c
---

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

diff --git a/libavcodec/loco.c b/libavcodec/loco.c
index e891d83ece..d0cedf577d 100644
--- a/libavcodec/loco.c
+++ b/libavcodec/loco.c
@@ -82,7 +82,7 @@ static inline void loco_update_rice_param(RICEContext *r, int val)
 
 static inline int loco_get_rice(RICEContext *r)
 {
-    int v;
+    unsigned v;
     if (r->run > 0) { /* we have zero run */
         r->run--;
         loco_update_rice_param(r, 0);