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Fix GH-16231 jdtounix overflow on argument value. #16240

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Fix GH-16231 jdtounix overflow on argument value. #16240

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6 changes: 3 additions & 3 deletions ext/calendar/cal_unix.c
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Original file line number Diff line number Diff line change
Expand Up @@ -60,13 +60,13 @@ PHP_FUNCTION(jdtounix)
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &uday) == FAILURE) {
RETURN_THROWS();
}
uday -= 2440588 /* J.D. of 1.1.1970 */;

if (uday < 0 || uday > ZEND_LONG_MAX / SECS_PER_DAY) { /* before beginning of unix epoch or greater than representable */
if (uday < 2440588 || (uday - 2440588) > (ZEND_LONG_MAX / SECS_PER_DAY)) { /* before beginning of unix epoch or greater than representable */
zend_value_error("jday must be between 2440588 and " ZEND_LONG_FMT, ZEND_LONG_MAX / SECS_PER_DAY + 2440588);
RETURN_THROWS();
}

uday -= 2440588 /* J.D. of 1.1.1970 */;

RETURN_LONG(uday * SECS_PER_DAY);
}
/* }}} */
21 changes: 21 additions & 0 deletions ext/calendar/tests/gh16231.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
--TEST--
GH-16231 (jdtounix argument overflow)
--EXTENSIONS--
calendar
--FILE--
<?php
try {
jdtounix(PHP_INT_MIN);
} catch (\ValueError $e) {
echo $e->getMessage() . PHP_EOL;
}

try {
jdtounix(240587);
} catch (\ValueError $e) {
echo $e->getMessage();
}
?>
--EXPECTF--
jday must be between 2440588 and %d
jday must be between 2440588 and %d
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