[FFmpeg-cvslog] avcodec/truemotion2: Fix overflow in tm2_apply_deltas()
Michael Niedermayer
git at videolan.org
Sat Jun 16 01:32:10 EEST 2018
ffmpeg | branch: release/4.0 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun 5 02:09:59 2018 +0200| [b55c824ee737c599e36dbf41797570aaea500091] | committer: Michael Niedermayer
avcodec/truemotion2: Fix overflow in tm2_apply_deltas()
Fixes: signed integer overflow: 1077952576 + 1077952576 cannot be represented in type 'int'
Fixes: 7712/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5056281753681920
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 79c6047c3668c639f717b3a7001a34dddba0ede2)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b55c824ee737c599e36dbf41797570aaea500091
---
libavcodec/truemotion2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index f7dbe047c7..b689efdb99 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -451,7 +451,7 @@ static inline int GET_TOK(TM2Context *ctx,int type)
/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
{
- int ct, d;
+ unsigned ct, d;
int i, j;
for (j = 0; j < 4; j++){
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