From: Dan Williams <dan.j.williams@intel.com>

Date: Mon, 29 Jan 2018 17:03:21 -0800

Subject: x86/spectre: Report get_user mitigation for spectre_v1

Git-commit: edfbae53dab8348fca778531be9f4855d2ca0360

Patch-mainline: v4.16-rc1

References: bsc#1068032 CVE-2017-5753

Reflect the presence of get_user(), __get_user(), and 'syscall' protections

in sysfs. The expectation is that new and better tooling will allow the

kernel to grow more usages of array_index_nospec(), for now, only claim

mitigation for __user pointer de-references.

Reported-by: Jiri Slaby <jslaby@suse.cz>

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Cc: linux-arch@vger.kernel.org

Cc: kernel-hardening@lists.openwall.com

Cc: gregkh@linuxfoundation.org

Cc: torvalds@linux-foundation.org

Cc: alan@linux.intel.com

Link: https://lkml.kernel.org/r/151727420158.33451.11658324346540434635.stgit@dwillia2-desk3.amr.corp.intel.com

Signed-off-by: Jiri Slaby <jslaby@suse.cz>

---

 arch/x86/kernel/cpu/bugs.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c

index 400c34ec9179..fdb6068a23b5 100644

--- a/arch/x86/kernel/cpu/bugs.c

+++ b/arch/x86/kernel/cpu/bugs.c

@@ -297,7 +297,7 @@ ssize_t cpu_show_spectre_v1(struct device *dev,

 {

 	if (!boot_cpu_has_bug(X86_BUG_SPECTRE_V1))

 		return sprintf(buf, "Not affected\n");

-	return sprintf(buf, "Vulnerable\n");

+	return sprintf(buf, "Mitigation: __user pointer sanitization\n");

 }

 ssize_t cpu_show_spectre_v2(struct device *dev,

-- 

2.16.1