diff --git a/[refs] b/[refs]
index ed5181a99b12..2aa540c639d7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 67159813127309c1a65d86e40fa0368241fa668c
+refs/heads/master: a337fdac7a5622d1e6547f4b476c14dfe5a2c892
diff --git a/trunk/kernel/signal.c b/trunk/kernel/signal.c
index bded65187780..919562c3d6b7 100644
--- a/trunk/kernel/signal.c
+++ b/trunk/kernel/signal.c
@@ -2214,6 +2214,14 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from)
 		err |= __put_user(from->si_addr, &to->si_addr);
 #ifdef __ARCH_SI_TRAPNO
 		err |= __put_user(from->si_trapno, &to->si_trapno);
+#endif
+#ifdef BUS_MCEERR_AO
+		/* 
+		 * Other callers might not initialize the si_lsb field,
+	 	 * so check explicitely for the right codes here.
+		 */
+		if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)
+			err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
 #endif
 		break;
 	case __SI_CHLD: