diff options
Diffstat (limited to 'arch/x86/kernel/msr.c')
| -rw-r--r-- | arch/x86/kernel/msr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c index 3db2252b958d..1547be359d7f 100644 --- a/arch/x86/kernel/msr.c +++ b/arch/x86/kernel/msr.c @@ -34,6 +34,7 @@ #include <linux/notifier.h> #include <linux/uaccess.h> #include <linux/gfp.h> +#include <linux/security.h> #include <asm/cpufeature.h> #include <asm/msr.h> @@ -79,6 +80,10 @@ static ssize_t msr_write(struct file *file, const char __user *buf, int err = 0; ssize_t bytes = 0; + err = security_locked_down(LOCKDOWN_MSR); + if (err) + return err; + if (count % 8) return -EINVAL; /* Invalid chunk size */ @@ -130,6 +135,9 @@ static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg) err = -EFAULT; break; } + err = security_locked_down(LOCKDOWN_MSR); + if (err) + break; err = wrmsr_safe_regs_on_cpu(cpu, regs); if (err) break; |