[FFmpeg-cvslog] avcodec/mobiclip: Check mv against INT_MAX

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Nov 14 22:27:00 2020 +0100| [a108a4d809f8345303e1aa7578d608a726c53686] | committer: Michael Niedermayer

avcodec/mobiclip: Check mv against INT_MAX

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 27369/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOBICLIP_fuzzer-5083469356728320

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=a108a4d809f8345303e1aa7578d608a726c53686
---

 libavcodec/mobiclip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/mobiclip.c b/libavcodec/mobiclip.c
index 42d33cf6a5..3c2df80896 100644
--- a/libavcodec/mobiclip.c
+++ b/libavcodec/mobiclip.c
@@ -1146,6 +1146,8 @@ static int predict_motion(AVCodecContext *avctx,
             mv.x = mv.x + get_se_golomb(gb);
             mv.y = mv.y + get_se_golomb(gb);
         }
+        if (mv.x >= INT_MAX || mv.y >= INT_MAX)
+            return AVERROR_INVALIDDATA;
 
         motion[offsetm].x = mv.x;
         motion[offsetm].y = mv.y;