Signed integer overflow in ext/standard/levenshtein.c

[YuanchengJiang]

Description

The following code:

<?php
$a = PHP_INT_MIN;
levenshtein($a,$a,$a,$a,$a);

Resulted in this output:

/php-src/ext/standard/levenshtein.c:54:20: runtime error: signed integer overflow: -9223372036854775808 + -9223372036854775808 cannot be represented in type 'long'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /php-src/ext/standard/levenshtein.c:54:20

PHP Version

PHP 8.4.0-dev

Operating System

ubuntu 22.04

[nielsdos]

Duplicate of #13823

[nielsdos]

Marked as duplicate but forgot to close it apparently. As discussion happened in the PR and the other issue I'll close this one.