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Date: Mon, 29 Jan 2018 17:03:21 -0800
From: Dan Williams <>
Cc:,,,,,, Ingo Molnar <>,
 "H. Peter Anvin" <>, Jiri Slaby <>,
Subject: [PATCH v6 13/13] x86/spectre: report get_user mitigation for

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.

Cc: Thomas Gleixner <>
Cc: Ingo Molnar <>
Cc: "H. Peter Anvin" <>
Cc: Greg Kroah-Hartman <>
Reported-by: Jiri Slaby <>
Signed-off-by: Dan Williams <>
 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 390b3dc3d438..06f1d4c5ec6b 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -269,7 +269,7 @@ 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,

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