4.4-stable patches

added patches:
	x86-boot-64-verify-alignment-of-the-load-segment.patch
	x86-build-64-force-the-linker-to-use-2mb-page-size.patch

diff --git a/queue-4.4/series b/queue-4.4/series
index 5e57a5bbf5a11e374b3a5b4b4488f3b48e7b6a41..bad2dc9e1628ae9940366df5f66f27383d14f194 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -33,3 +33,5 @@ can-cc770-fix-queue-stall-dropped-rtr-reply.patch
 can-cc770-fix-use-after-free-in-cc770_tx_interrupt.patch
 tty-vt-fix-up-tabstops-properly.patch
 kvm-x86-fix-icebp-instruction-handling.patch
+x86-build-64-force-the-linker-to-use-2mb-page-size.patch
+x86-boot-64-verify-alignment-of-the-load-segment.patch

diff --git a/queue-4.4/x86-boot-64-verify-alignment-of-the-load-segment.patch b/queue-4.4/x86-boot-64-verify-alignment-of-the-load-segment.patch
new file mode 100644 (file)
index 0000000..20dc96b
--- /dev/null
+++ b/queue-4.4/x86-boot-64-verify-alignment-of-the-load-segment.patch
@@ -0,0 +1,43 @@
+From c55b8550fa57ba4f5e507be406ff9fc2845713e8 Mon Sep 17 00:00:00 2001
+From: "H.J. Lu" <hjl.tools@gmail.com>
+Date: Mon, 19 Mar 2018 14:08:11 -0700
+Subject: x86/boot/64: Verify alignment of the LOAD segment
+
+From: H.J. Lu <hjl.tools@gmail.com>
+
+commit c55b8550fa57ba4f5e507be406ff9fc2845713e8 upstream.
+
+Since the x86-64 kernel must be aligned to 2MB, refuse to boot the
+kernel if the alignment of the LOAD segment isn't a multiple of 2MB.
+
+Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
+Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
+Cc: Eric Biederman <ebiederm@xmission.com>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Juergen Gross <jgross@suse.com>
+Cc: Kees Cook <keescook@chromium.org>
+Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Link: http://lkml.kernel.org/r/CAMe9rOrR7xSJgUfiCoZLuqWUwymRxXPoGBW38%2BpN%3D9g%2ByKNhZw@mail.gmail.com
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/boot/compressed/misc.c |    4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/arch/x86/boot/compressed/misc.c
++++ b/arch/x86/boot/compressed/misc.c
+@@ -366,6 +366,10 @@ static void parse_elf(void *output)
+ 
+               switch (phdr->p_type) {
+               case PT_LOAD:
++#ifdef CONFIG_X86_64
++                      if ((phdr->p_align % 0x200000) != 0)
++                              error("Alignment of LOAD segment isn't multiple of 2MB");
++#endif
+ #ifdef CONFIG_RELOCATABLE
+                       dest = output;
+                       dest += (phdr->p_paddr - LOAD_PHYSICAL_ADDR);

diff --git a/queue-4.4/x86-build-64-force-the-linker-to-use-2mb-page-size.patch b/queue-4.4/x86-build-64-force-the-linker-to-use-2mb-page-size.patch
new file mode 100644 (file)
index 0000000..e368c3b
--- /dev/null
+++ b/queue-4.4/x86-build-64-force-the-linker-to-use-2mb-page-size.patch
@@ -0,0 +1,54 @@
+From e3d03598e8ae7d195af5d3d049596dec336f569f Mon Sep 17 00:00:00 2001
+From: "H.J. Lu" <hjl.tools@gmail.com>
+Date: Mon, 19 Mar 2018 13:57:46 -0700
+Subject: x86/build/64: Force the linker to use 2MB page size
+
+From: H.J. Lu <hjl.tools@gmail.com>
+
+commit e3d03598e8ae7d195af5d3d049596dec336f569f upstream.
+
+Binutils 2.31 will enable -z separate-code by default for x86 to avoid
+mixing code pages with data to improve cache performance as well as
+security.  To reduce x86-64 executable and shared object sizes, the
+maximum page size is reduced from 2MB to 4KB.  But x86-64 kernel must
+be aligned to 2MB.  Pass -z max-page-size=0x200000 to linker to force
+2MB page size regardless of the default page size used by linker.
+
+Tested with Linux kernel 4.15.6 on x86-64.
+
+Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
+Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
+Cc: Eric Biederman <ebiederm@xmission.com>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Juergen Gross <jgross@suse.com>
+Cc: Kees Cook <keescook@chromium.org>
+Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Link: http://lkml.kernel.org/r/CAMe9rOp4_%3D_8twdpTyAP2DhONOCeaTOsniJLoppzhoNptL8xzA@mail.gmail.com
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/Makefile |    9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+--- a/arch/x86/Makefile
++++ b/arch/x86/Makefile
+@@ -179,6 +179,15 @@ KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
+ 
+ LDFLAGS := -m elf_$(UTS_MACHINE)
+ 
++#
++# The 64-bit kernel must be aligned to 2MB.  Pass -z max-page-size=0x200000 to
++# the linker to force 2MB page size regardless of the default page size used
++# by the linker.
++#
++ifdef CONFIG_X86_64
++LDFLAGS += $(call ld-option, -z max-page-size=0x200000)
++endif
++
+ # Speed up the build
+ KBUILD_CFLAGS += -pipe
+ # Workaround for a gcc prelease that unfortunately was shipped in a suse release