This is a note to let you know that I've just added the patch titled
Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
to the 3.10-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:
revert-x86-64-modify_ldt-make-support-for-16-bit-segments-a-runtime-option.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7ed6fb9b5a5510e4ef78ab27419184741169978a Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Wed, 21 May 2014 10:22:59 -0700
Subject: Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
commit 7ed6fb9b5a5510e4ef78ab27419184741169978a upstream.
This reverts commit fa81511bb0bbb2b1aace3695ce869da9762624ff in
preparation of merging in the proper fix (espfix64).
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/ldt.c | 4 +---
arch/x86/vdso/vdso32-setup.c | 8 --------
2 files changed, 1 insertion(+), 11 deletions(-)
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -20,8 +20,6 @@
#include <asm/mmu_context.h>
#include <asm/syscalls.h>
-int sysctl_ldt16 = 0;
-
#ifdef CONFIG_SMP
static void flush_ldt(void *current_mm)
{
@@ -236,7 +234,7 @@ static int write_ldt(void __user *ptr, u
* IRET leaking the high bits of the kernel stack address.
*/
#ifdef CONFIG_X86_64
- if (!ldt_info.seg_32bit && !sysctl_ldt16) {
+ if (!ldt_info.seg_32bit) {
error = -EINVAL;
goto out_unlock;
}
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -41,7 +41,6 @@ enum {
#ifdef CONFIG_X86_64
#define vdso_enabled sysctl_vsyscall32
#define arch_setup_additional_pages syscall32_setup_pages
-extern int sysctl_ldt16;
#endif
/*
@@ -380,13 +379,6 @@ static ctl_table abi_table2[] = {
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
- },
- {
- .procname = "ldt16",
- .data = &sysctl_ldt16,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
},
{}
};
Patches currently in stable-queue which might be from hpa@xxxxxxxxx are
queue-3.10/x86-espfix-make-it-possible-to-disable-16-bit-support.patch
queue-3.10/revert-x86-64-modify_ldt-make-support-for-16-bit-segments-a-runtime-option.patch
queue-3.10/x86-espfix-make-espfix64-a-kconfig-option-fix-uml.patch
--
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