diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2014-05-21 10:22:59 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-07 12:00:10 -0700 |
| commit | 6c7e43ada5875cb1592046242f22f2fa54b09ca0 (patch) | |
| tree | c97cfde2a4e6c929528f02a94f6a07159617895f | |
| parent | fbbb7208969e8bfbd07782bbec069878a29d3267 (diff) | |
Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
commit 7ed6fb9b5a5510e4ef78ab27419184741169978a upstream.
This reverts commit fa81511bb0bbb2b1aace3695ce869da9762624ff in
preparation of merging in the proper fix (espfix64).
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kernel/ldt.c | 4 | ||||
| -rw-r--r-- | arch/x86/vdso/vdso32-setup.c | 8 |
2 files changed, 1 insertions, 11 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index dcbbaa165bde..af1d14a9ebda 100644 --- 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, unsigned long bytecount, int oldmode) * 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; } diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c index c734408d55e4..66e6d9359826 100644 --- 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 /* @@ -381,13 +380,6 @@ static ctl_table abi_table2[] = { .mode = 0644, .proc_handler = proc_dointvec }, - { - .procname = "ldt16", - .data = &sysctl_ldt16, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec - }, {} }; |