--- pppd/plugins/winbind.c

+++ pppd/plugins/winbind.c

@@ -296,16 +296,23 @@

 	if (forkret == 0) {

 		/* child process */

-		uid_t uid;

+		uid_t uid = getuid();

 		close(child_out[0]);

 		close(child_in[1]);

 		/* run winbind as the user that invoked pppd */

 		setgid(getgid());

-		uid = getuid();

 		if (setuid(uid) == -1 || getuid() != uid)

+		{

 			fatal("pppd/winbind: could not setuid to %d: %m", uid);

+			exit(1);

+		}

+		if (getuid() != uid) {

+                       perror("pppd/winbind: could not setuid to orig uid");

+                       exit(1);

+                }

+

 		execl("/bin/sh", "sh", "-c", ntlm_auth, NULL);  

 		fatal("pppd/winbind: could not exec /bin/sh: %m");

 	}