80 lines
2.4 KiB
Diff
80 lines
2.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Thomas Gleixner <tglx@linutronix.de>
|
|
Date: Mon, 4 Dec 2017 15:07:46 +0100
|
|
Subject: [PATCH] x86/entry: Align entry text section to PMD boundary
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
CVE-2017-5754
|
|
|
|
The (irq)entry text must be visible in the user space page tables. To allow
|
|
simple PMD based sharing, make the entry text PMD aligned.
|
|
|
|
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
Cc: Andy Lutomirski <luto@kernel.org>
|
|
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
|
|
Cc: Borislav Petkov <bp@alien8.de>
|
|
Cc: Brian Gerst <brgerst@gmail.com>
|
|
Cc: Dave Hansen <dave.hansen@linux.intel.com>
|
|
Cc: David Laight <David.Laight@aculab.com>
|
|
Cc: Denys Vlasenko <dvlasenk@redhat.com>
|
|
Cc: Eduardo Valentin <eduval@amazon.com>
|
|
Cc: Greg KH <gregkh@linuxfoundation.org>
|
|
Cc: H. Peter Anvin <hpa@zytor.com>
|
|
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
|
|
Cc: Juergen Gross <jgross@suse.com>
|
|
Cc: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Cc: Peter Zijlstra <peterz@infradead.org>
|
|
Cc: Will Deacon <will.deacon@arm.com>
|
|
Cc: aliguori@amazon.com
|
|
Cc: daniel.gruss@iaik.tugraz.at
|
|
Cc: hughd@google.com
|
|
Cc: keescook@google.com
|
|
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
(cherry picked from commit 2f7412ba9c6af5ab16bdbb4a3fdb1dcd2b4fd3c2)
|
|
Signed-off-by: Andy Whitcroft <apw@canonical.com>
|
|
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
|
|
(cherry picked from commit 3cf72b14b56834882ebe731d5fa84d249c56a188)
|
|
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
|
|
---
|
|
arch/x86/kernel/vmlinux.lds.S | 8 ++++++++
|
|
1 file changed, 8 insertions(+)
|
|
|
|
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
|
|
index 423aa36f0150..f505d8dbdccf 100644
|
|
--- a/arch/x86/kernel/vmlinux.lds.S
|
|
+++ b/arch/x86/kernel/vmlinux.lds.S
|
|
@@ -60,11 +60,17 @@ jiffies_64 = jiffies;
|
|
. = ALIGN(HPAGE_SIZE); \
|
|
__end_rodata_hpage_align = .;
|
|
|
|
+#define ALIGN_ENTRY_TEXT_BEGIN . = ALIGN(PMD_SIZE);
|
|
+#define ALIGN_ENTRY_TEXT_END . = ALIGN(PMD_SIZE);
|
|
+
|
|
#else
|
|
|
|
#define X64_ALIGN_RODATA_BEGIN
|
|
#define X64_ALIGN_RODATA_END
|
|
|
|
+#define ALIGN_ENTRY_TEXT_BEGIN
|
|
+#define ALIGN_ENTRY_TEXT_END
|
|
+
|
|
#endif
|
|
|
|
PHDRS {
|
|
@@ -101,8 +107,10 @@ SECTIONS
|
|
CPUIDLE_TEXT
|
|
LOCK_TEXT
|
|
KPROBES_TEXT
|
|
+ ALIGN_ENTRY_TEXT_BEGIN
|
|
ENTRY_TEXT
|
|
IRQENTRY_TEXT
|
|
+ ALIGN_ENTRY_TEXT_END
|
|
SOFTIRQENTRY_TEXT
|
|
*(.fixup)
|
|
*(.gnu.warning)
|
|
--
|
|
2.14.2
|
|
|