Upstream commit: adb83f779618674e5e96e27e3d48559d62e2c410
To fix: https://github.com/shadow-maint/shadow/pull/398
Index: shadow-4.9/src/passwd.c
===================================================================
--- shadow-4.9.orig/src/passwd.c
+++ shadow-4.9/src/passwd.c
@@ -490,9 +490,12 @@ static void print_status (const struct p
 		               ((long long)sp->sp_max * SCALE) / DAY,
 		               ((long long)sp->sp_warn * SCALE) / DAY,
 		               ((long long)sp->sp_inact * SCALE) / DAY);
-	} else {
+	} else if (NULL != pw->pw_passwd) {
 		(void) printf ("%s %s\n",
-		               pw->pw_name, pw_status (pw->pw_passwd));
+				pw->pw_name, pw_status (pw->pw_passwd));
+	} else {
+		(void) fprintf(stderr, _("%s: malformed password data obtained for user %s\n"),
+				Prog, pw->pw_name);
 	}
 }