Add checks for localtime() returning NULL.

* modules/pam_lastlog/pam_lastlog.c (last_login_read): Check for localtime_r
returning NULL.
* modules/pam_tally2/pam_tally2.c (print_one): Check for localtime returning
NULL.

1 files changed, 5 insertions, 4 deletions

diff --git a/modules/pam_tally2/pam_tally2.c b/modules/pam_tally2/pam_tally2.c
index e513f64c..9187cbfd 100644
--- a/modules/pam_tally2/pam_tally2.c
+++ b/modules/pam_tally2/pam_tally2.c
@@ -924,7 +924,7 @@ static void
 print_one(const struct tallylog *tally, uid_t uid)
 {
    static int once;
-   char *cp;
+   char *cp = "[UNKNOWN]";
    time_t fail_time;
    struct tm *tm;
    struct passwd *pwent;
@@ -933,9 +933,10 @@ print_one(const struct tallylog *tally, uid_t uid)
 
    pwent = getpwuid(uid);
    fail_time = tally->fail_time;
-   tm = localtime(&fail_time);
-   strftime (ptime, sizeof (ptime), "%D %H:%M:%S", tm);
-   cp = ptime;
+   if ((tm = localtime(&fail_time)) != NULL) {
+        strftime (ptime, sizeof (ptime), "%D %H:%M:%S", tm);
+        cp = ptime;
+   }
    if (pwent) {
         username = pwent->pw_name;
    }