getservbyport_r: fix out-of-bounds buffer read

[musl] / src / time / gmtime_r.c

#include "time_impl.h"
#include <errno.h>

struct tm *__gmtime_r(const time_t *restrict t, struct tm *restrict tm)
{
        if (__secs_to_tm(*t, tm) < 0) {
                errno = EOVERFLOW;
                return 0;
        }
        tm->tm_isdst = 0;
        tm->__tm_gmtoff = 0;
        tm->__tm_zone = __utc;
        return tm;
}

weak_alias(__gmtime_r, gmtime_r);