Signed-off-by: Thomas Renninger <[email protected]>
---
arch/x86/kernel/msr.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index a7c5661..3de9128 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -37,6 +37,7 @@
#include <linux/notifier.h>
#include <linux/uaccess.h>
#include <linux/gfp.h>
+#include <linux/capability.h>
#include <asm/processor.h>
#include <asm/msr.h>
@@ -103,6 +104,9 @@ static ssize_t msr_write(struct file *file, const char
__user *buf,
int err = 0;
ssize_t bytes = 0;
+ if (!capable(CAP_COMPROMISE_KERNEL))
+ return -EPERM;
+
if (count % 8)
return -EINVAL; /* Invalid chunk size */
--
1.7.6.1
--
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