Fixes: signed integer overflow: 1477974040 - -1877995504 cannot be represented
in type 'int'
Fixes: 4861/clusterfuzz-testcase-minimized-4570316383715328
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
---
libavcodec/truemotion2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index f077f0e4bd..97c38f7f08 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -441,8 +441,8 @@ static inline int GET_TOK(TM2Context *ctx,int type)
/* recalculate last and delta values for next blocks */
#define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
-CD[0] = CHR[1] - last[1];\
-CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
+CD[0] = (unsigned)CHR[ 1] - (unsigned)last[1];\
+CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
last[0] = (int)CHR[stride + 0];\
last[1] = (int)CHR[stride + 1];}
--
2.15.1
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