mirror of https://git.ffmpeg.org/ffmpeg.git
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>
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@ -1421,7 +1421,7 @@ static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock
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if (!block->ref) {
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pred_block_dc(block, stride, x, y);
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for (i = 0; i < 3; i++)
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block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
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block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
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return;
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}
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