Commit b5995856 authored by Michael Niedermayer's avatar Michael Niedermayer

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 's avatarMichael Niedermayer <>
parent 8e17cd20
......@@ -1421,7 +1421,7 @@ 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);
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