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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-26 20:26:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-28 03:41:08 +0200 |
| commit | f4c8449238319d23e2e1bcd151c9af38e36c7eb3 (patch) | |
| tree | cd4e06b085f99ce92b6492f815309785ee7da093 | |
| parent | 956f2db21ffc1ca7f8dae7a3f44b09a145d9b9fa (diff) | |
| download | ffmpeg-f4c8449238319d23e2e1bcd151c9af38e36c7eb3.tar.gz | |
avcodec/diracdec: Fix integer overflow in signed multiplication in UNPACK_ARITH()
Fixes: runtime error: signed integer overflow: 1073741823 * 4 cannot be represented in type 'int'
Fixes: 2729/clusterfuzz-testcase-minimized-5902915464069120
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 8e275a74b09cc87f4334ed572f919b7647d4bea1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/diracdec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 9b3adfa9a8..160085f852 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -462,7 +462,8 @@ static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffse static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \ SubBand *b, type *buf, int x, int y) \ { \ - int coeff, sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \ + int sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \ + unsigned coeff; \ const int mstride = -(b->stride >> (1+b->pshift)); \ if (b->parent) { \ const type *pbuf = (type *)b->parent->ibuf; \ |