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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-10 01:32:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-11 13:28:41 +0200 |
| commit | a295d1870a8cc98e397ec51458ef5ed514ee7ee2 (patch) | |
| tree | e646d05818f471d48f0ba24f71f63a55d8d1fe29 | |
| parent | b590758298cc6f7bac710ebaecb99a4de878c7f8 (diff) | |
| download | ffmpeg-a295d1870a8cc98e397ec51458ef5ed514ee7ee2.tar.gz | |
avcodec/diracdec: Fix overflow in DC computation
Fixes: runtime error: signed integer overflow: 11896 + 2147483646 cannot be represented in type 'int'
Fixes: 3053/clusterfuzz-testcase-minimized-6355082062856192
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 b5995856a4236c27f231210bb08d70688e045192)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/diracdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 1498dbde0a..791b7f9928 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1422,7 +1422,7 @@ static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock if (!block->ref) { pred_block_dc(block, stride, x, y); for (i = 0; i < 3; i++) - block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA); + block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA); return; } |