[FFmpeg-cvslog] avcodec/truemotion2: Fix integer overflow in last loop in tm2_update_block()

Michael Niedermayer git at videolan.org
Tue Jun 25 14:31:34 EEST 2019


ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Jun 13 19:45:50 2019 +0200| [3aecd0170413c7e56f19de4e34d093a2c4027c2a] | committer: Michael Niedermayer

avcodec/truemotion2: Fix integer overflow in last loop in tm2_update_block()

Fixes: signed integer overflow: -1727985666 - 538976288 cannot be represented in type 'int'
Fixes: 15031/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5100228035739648

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3aecd0170413c7e56f19de4e34d093a2c4027c2a
---

 libavcodec/truemotion2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index ade214effc..a86dd16e0f 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -681,7 +681,7 @@ static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by
 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
 {
     int i, j;
-    int d;
+    unsigned d;
     TM2_INIT_POINTERS_2();
 
     /* update chroma */



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