70 lines
2.1 KiB
Diff
70 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Josh Poimboeuf <jpoimboe@redhat.com>
|
|
Date: Mon, 18 Sep 2017 21:43:36 -0500
|
|
Subject: [PATCH] x86/xen: Add unwind hint annotations
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
CVE-2017-5754
|
|
|
|
Add unwind hint annotations to the xen head code so the ORC unwinder can
|
|
read head_64.o.
|
|
|
|
hypercall_page needs empty annotations at 32-byte intervals to match the
|
|
'xen_hypercall_*' ELF functions at those locations.
|
|
|
|
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
|
|
Cc: Andy Lutomirski <luto@kernel.org>
|
|
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
|
|
Cc: Jiri Slaby <jslaby@suse.cz>
|
|
Cc: Juergen Gross <jgross@suse.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/70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066.git.jpoimboe@redhat.com
|
|
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
(cherry picked from commit abbe1cac6214d81d2f4e149aba64a8760703144e)
|
|
Signed-off-by: Andy Whitcroft <apw@canonical.com>
|
|
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
|
|
(cherry picked from commit 9f099a90cb39eaff9b3187e8a6d8151c8af53db1)
|
|
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
|
|
---
|
|
arch/x86/xen/xen-head.S | 7 ++++++-
|
|
1 file changed, 6 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
|
|
index 2f0cff2cc265..ad189ab2c329 100644
|
|
--- a/arch/x86/xen/xen-head.S
|
|
+++ b/arch/x86/xen/xen-head.S
|
|
@@ -9,6 +9,7 @@
|
|
#include <asm/boot.h>
|
|
#include <asm/asm.h>
|
|
#include <asm/page_types.h>
|
|
+#include <asm/unwind_hints.h>
|
|
|
|
#include <xen/interface/elfnote.h>
|
|
#include <xen/interface/features.h>
|
|
@@ -19,6 +20,7 @@
|
|
#ifdef CONFIG_XEN_PV
|
|
__INIT
|
|
ENTRY(startup_xen)
|
|
+ UNWIND_HINT_EMPTY
|
|
cld
|
|
|
|
/* Clear .bss */
|
|
@@ -40,7 +42,10 @@ END(startup_xen)
|
|
.pushsection .text
|
|
.balign PAGE_SIZE
|
|
ENTRY(hypercall_page)
|
|
- .skip PAGE_SIZE
|
|
+ .rept (PAGE_SIZE / 32)
|
|
+ UNWIND_HINT_EMPTY
|
|
+ .skip 32
|
|
+ .endr
|
|
|
|
#define HYPERCALL(n) \
|
|
.equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
|
|
--
|
|
2.14.2
|
|
|