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Fix UB when shifting value too far left ##esil

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Luc Tielen 2023-05-02 17:35:15 +02:00 committed by pancake
parent 736d36263e
commit e16996847e
1 changed files with 6 additions and 2 deletions
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8
libr/esil/esil.c
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@ -1445,8 +1445,12 @@ static bool esil_asr(REsil *esil) {
ut64 left_bits = 0;
if (regsize <= 64) {
if (op_num & (1ULL << (regsize - 1))) {
left_bits = (1ULL << param_num) - 1;
left_bits <<= regsize - param_num;
if (regsize - param_num >= 64) {
left_bits = 0;
} else {
left_bits = (1ULL << param_num) - 1;
left_bits <<= regsize - param_num;
}
}
}
op_num = left_bits | (op_num >> param_num);