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Patch "kbuild: add -fno-PIE" has been added to the 4.8-stable tree

PATCH [email protected] 1 participant 1 message Nov 21, 2016

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This is a note to let you know that I've just added the patch titled

kbuild: add -fno-PIE

to the 4.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kbuild-add-fno-pie.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 8ae94224c9d72fc4d9aaac93b2d7833cf46d7141 Mon Sep 17 00:00:00 2001

From: Sebastian Andrzej Siewior <[email protected]>
Date: Fri, 4 Nov 2016 19:39:38 +0100
Subject: kbuild: add -fno-PIE
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Sebastian Andrzej Siewior <[email protected]>

commit 8ae94224c9d72fc4d9aaac93b2d7833cf46d7141 upstream.

Debian started to build the gcc with -fPIE by default so the kernel build ends before it starts properly with:
|kernel/bounds.c:1:0: error: code model kernel does not support PIC mode

Also add to KBUILD_AFLAGS due to:

|gcc -Wp,-MD,arch/x86/entry/vdso/vdso32/.note.o.d … -mfentry -DCC_USING_FENTRY … vdso/vdso32/note.S |arch/x86/entry/vdso/vdso32/note.S:1:0: sorry, unimplemented: -mfentry isn’t supported for 32-bit in combination with -fpic

Tagging it stable so it is possible to compile recent stable kernels as well.

Signed-off-by Sebastian Andrzej Siewior <[email protected]>
Signed-off-by Michal Marek <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 Makefile |    2 ++
 1 file changed, 2 insertions(+)
Makefile +2 -0
@@ -622,6 +622,8 @@ include arch/$(SRCARCH)/Makefile
 KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning,maybe-uninitialized,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
+KBUILD_CFLAGS	+= $(call cc-option,-fno-PIE)
+KBUILD_AFLAGS	+= $(call cc-option,-fno-PIE)
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS	+= -Os

Patches currently in stable-queue which might be from [email protected] are

queue-4.8/x86-kexec-add-fno-pie.patch queue-4.8/scripts-has-stack-protector-add-fno-pie.patch queue-4.8/kbuild-add-fno-pie.patch queue-4.8/x86-cpu-deal-with-broken-firmware-vmware-xen.patch queue-4.8/kbuild-steal-gcc-s-pie-from-the-very-beginning.patch