diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 701b2d2..8b4708d 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -341,8 +341,15 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
 			info->prev_sp = info->sp - frame_size;
 			if (e->Millicode)
 				info->rp = info->r31;
-			else if (rpoffset)
-				info->rp = *(unsigned long *)(info->prev_sp - rpoffset);
+			else if (rpoffset) {
+				unsigned long tmp;
+
+				if (get_user(tmp,
+				       (unsigned long *)(info->prev_sp - rpoffset)))
+					info->rp = 0;
+				else
+					info->rp = tmp;
+			}
 			info->prev_ip = info->rp;
 			info->rp = 0;
 		}