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Use stack allocation in timezone_initialize() #19394

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Merged
merged 1 commit into from
Aug 8, 2025
Merged

Use stack allocation in timezone_initialize() #19394

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20 changes: 8 additions & 12 deletions ext/date/php_date.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3970,40 +3970,36 @@ PHP_FUNCTION(date_diff)

static bool timezone_initialize(php_timezone_obj *tzobj, const zend_string *tz_zstr, char **warning_message) /* {{{ */
{
timelib_time *dummy_t = ecalloc(1, sizeof(timelib_time));
timelib_time dummy_t = {0};
int dst, not_found;
const char *tz = ZSTR_VAL(tz_zstr);

ZEND_ASSERT(!zend_str_has_nul_byte(tz_zstr) && "timezone should have been checked to not have null bytes");

dummy_t->z = timelib_parse_zone(&tz, &dst, dummy_t, &not_found, DATE_TIMEZONEDB, php_date_parse_tzfile_wrapper);
if ((dummy_t->z >= (100 * 60 * 60)) || (dummy_t->z <= (-100 * 60 * 60))) {
dummy_t.z = timelib_parse_zone(&tz, &dst, &dummy_t, &not_found, DATE_TIMEZONEDB, php_date_parse_tzfile_wrapper);
if ((dummy_t.z >= (100 * 60 * 60)) || (dummy_t.z <= (-100 * 60 * 60))) {
if (warning_message) {
spprintf(warning_message, 0, "Timezone offset is out of range (%s)", ZSTR_VAL(tz_zstr));
}
timelib_free(dummy_t->tz_abbr);
efree(dummy_t);
timelib_free(dummy_t.tz_abbr);
return false;
}
dummy_t->dst = dst;
dummy_t.dst = dst;
if (!not_found && (*tz != '\0')) {
if (warning_message) {
spprintf(warning_message, 0, "Unknown or bad timezone (%s)", ZSTR_VAL(tz_zstr));
}
timelib_free(dummy_t->tz_abbr);
efree(dummy_t);
timelib_free(dummy_t.tz_abbr);
return false;
}
if (not_found) {
if (warning_message) {
spprintf(warning_message, 0, "Unknown or bad timezone (%s)", ZSTR_VAL(tz_zstr));
}
efree(dummy_t);
return false;
} else {
set_timezone_from_timelib_time(tzobj, dummy_t);
timelib_free(dummy_t->tz_abbr);
efree(dummy_t);
set_timezone_from_timelib_time(tzobj, &dummy_t);
timelib_free(dummy_t.tz_abbr);
return true;
}
} /* }}} */
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