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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-10 02:32:50 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-17 13:21:32 +0300 |
| commit | f3c3cd5afbacf99f14cdcafd6d5dffceb6d06626 (patch) | |
| tree | 6ccbd0623cb45901e6b3c26360464a0d52e80079 | |
| parent | 256ebf8bb4146d51da7d0cf1205c597627af1b04 (diff) | |
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 46e8377bc9..0b8b799dc0 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1416,7 +1416,7 @@ 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; } |