Pick fix, based on what has been applied upstream into Linux
Index: user-mode-linux/arch/x86/Makefile
===================================================================
--- user-mode-linux.orig/arch/x86/Makefile	2016-11-26 14:27:13.000000000 +0530
+++ user-mode-linux/arch/x86/Makefile	2016-12-03 20:05:44.102220972 +0530
@@ -66,6 +66,9 @@
 
         # prevent gcc from keeping the stack 16 byte aligned
         KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+	
+	# don't enable PIE for kernel
+        KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
 
         # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
         # a lot more stack due to the lack of sharing of stacklots:
@@ -102,6 +105,9 @@
 
 	# Use -mskip-rax-setup if supported.
 	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
+	
+	# don't enable PIE for kernel
+        KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
 
         # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
         cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)