diff --git a/[refs] b/[refs]
index 35fa2f3ba4b3..097850027c00 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b20cc8aff258eea5a2339107605ebea949fa6ecf
+refs/heads/master: d5812a77e5803468a5033be91af978be0f7a17d9
diff --git a/trunk/arch/ppc/kernel/align.c b/trunk/arch/ppc/kernel/align.c
index 40d356c66c41..ff81da9598d8 100644
--- a/trunk/arch/ppc/kernel/align.c
+++ b/trunk/arch/ppc/kernel/align.c
@@ -290,6 +290,10 @@ fix_alignment(struct pt_regs *regs)
 			/* lwm, stmw */
 			nb = (32 - reg) * 4;
 		}
+
+		if (!access_ok((flags & ST? VERIFY_WRITE: VERIFY_READ), addr, nb+nb0))
+			return -EFAULT;	/* bad address */
+
 		rptr = (unsigned char *) &regs->gpr[reg];
 		if (flags & LD) {
 			for (i = 0; i < nb; ++i)