protect potential overflow for x86_64

git-svn-id: svn://busybox.net/trunk/busybox@13749 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 3 insertions, 2 deletions

diff --git a/miscutils/last.c b/miscutils/last.c
index d7ce5e775..72386ea94 100644
--- a/miscutils/last.c
+++ b/miscutils/last.c
@@ -47,6 +47,7 @@ extern int last_main(int argc, char **argv)
 {
         struct utmp ut;
         int n, file = STDIN_FILENO;
+        time_t t_tmp;
 
         if (argc > 1) {
                 bb_show_usage();
@@ -98,9 +99,9 @@ extern int last_main(int argc, char **argv)
                                         break;
                         }
                 }
-
+                t_tmp = (time_t)ut.ut_tv.tv_sec;
                 printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host,
-                                ctime((time_t *)&(ut.ut_tv.tv_sec)) + 4);
+                                ctime(&t_tmp) + 4);
         }
 
         bb_fflush_stdout_and_exit(EXIT_SUCCESS);