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-rw-r--r--arch/x86/kernel/msr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index a7c5661..4929502 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -174,6 +174,9 @@ static int msr_open(struct inode *inode, struct file *file)
unsigned int cpu;
struct cpuinfo_x86 *c;
+ if (!capable(CAP_SYS_RAWIO))
+ return -EPERM;
+
cpu = iminor(file->f_path.dentry->d_inode);
if (cpu >= nr_cpu_ids || !cpu_online(cpu))
return -ENXIO; /* No such CPU */
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