added a check to avoid freeing null pointer

diff --git a/src/newusers.c b/src/newusers.c
index c38aec4b43b85163a5b9ae832d4ce0c6e41cf69e..664313fc62c36268638bdbc696781d46ef2f216b 100644 (file)
--- a/src/newusers.c
+++ b/src/newusers.c
@@ -290,6 +290,7 @@ static int add_group (const char *name, const char *gid, gid_t *ngid, uid_t uid)
                fprintf (stderr,
                         _("%s: invalid group name '%s'\n"),
                         Prog, grent.gr_name);
+               if (grent.gr_name)
                free (grent.gr_name);
                return -1;
        }