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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-20 14:21:11 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-20 14:21:11 +0900 |
| commit | 172de656b98efd81399aec83837dccaa276622c4 (patch) | |
| tree | 0efb12dc5f4a35682be0eb3fe092759cf9e796ad /arch/x86/kernel/ldt.c | |
| parent | 95d08585e093a9f07562b4a3984370b4d72f1a57 (diff) | |
| parent | fa81511bb0bbb2b1aace3695ce869da9762624ff (diff) | |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86-64, modify_ldt: Make support for 16-bit segments a runtime option
x86, mm, hugetlb: Add missing TLB page invalidation for hugetlb_cow()
x86, rdrand: When nordrand is specified, disable RDSEED as well
Diffstat (limited to 'arch/x86/kernel/ldt.c')
| -rw-r--r-- | arch/x86/kernel/ldt.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index af1d14a9ebd..dcbbaa165bd 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -20,6 +20,8 @@ #include <asm/mmu_context.h> #include <asm/syscalls.h> +int sysctl_ldt16 = 0; + #ifdef CONFIG_SMP static void flush_ldt(void *current_mm) { @@ -234,7 +236,7 @@ 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) { + if (!ldt_info.seg_32bit && !sysctl_ldt16) { error = -EINVAL; goto out_unlock; } |