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avcodec/truemotion2: Fix overflow in tm2_apply_deltas()

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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@niedermayer.cc>
(cherry picked from commit 79c6047c3668c639f717b3a7001a34dddba0ede2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-06-05 02:09:59 +02:00
parent 412872e6cb
commit 0f1e6771d0
1 changed files with 1 additions and 1 deletions
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libavcodec/truemotion2.c
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@ -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++){