Handle PHP_INT_MIN properly

Author: Girgias

Zend/tests/zend_ini/zend_ini_parse_quantity_overflow.phpt

@@ -30,13 +30,13 @@ $tests = [
     'No overflow 002' => '1',
     'No overflow 003' => '100',
     'No overflow 004' => strval(PHP_INT_MAX),
-    'No overflow 005' => strval(-PHP_INT_MAX),
+    'No overflow 005' => strval(PHP_INT_MIN),
     'No overflow 006' => '2K',
     'No overflow 007' => '-2K',
     'Subject overflow 001' => increment(strval(PHP_INT_MAX)),
-    'Subject overflow 002' => decrement(strval(-PHP_INT_MAX)),
+    'Subject overflow 002' => decrement(strval(PHP_INT_MIN)),
     'Multiplier overflow 001' => strval(PHP_INT_MAX).'K',
-    'Multiplier overflow 002' => strval(-PHP_INT_MAX).'K',
+    'Multiplier overflow 002' => strval(PHP_INT_MIN).'K',
 ];
 
 foreach ($tests as $name => $value) {

Zend/zend_ini.c

@@ -642,7 +642,10 @@ static zend_ulong zend_ini_parse_quantity_internal(zend_string *value, zend_ini_
 			}
 		}
 	} else if (signed_result == ZEND_INI_PARSE_QUANTITY_SIGNED) {
-		if ((zend_long) retval < 0) {
+		/* Handle PHP_INT_MIN case */
+		if (is_negative && retval == ((zend_ulong)ZEND_LONG_MAX +1)) {
+			retval = 0u - retval;
+		} else if ((zend_long) retval < 0) {
 			overflow = true;
 		} else if (is_negative) {
 			retval = 0u - retval;