Fix #72146: Integer overflow on substr_replace #7240
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Adding two `zend_long`s may overflow, and casting `size_t` to `zend_long` may truncate; we can avoid this here by enforcing unsigned arithmetic.
nikic
approved these changes
Jul 15, 2021
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Adding two
zend_longs may overflow, and castingsize_ttozend_longmay truncate; we can avoid this here by enforcing unsignedarithmetic.