diff options
| -rw-r--r-- | xen/drivers/cpufreq/cpufreq.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c index 0de5d41d44..ab66884797 100644 --- a/xen/drivers/cpufreq/cpufreq.c +++ b/xen/drivers/cpufreq/cpufreq.c @@ -471,8 +471,12 @@ int set_px_pminfo(uint32_t acpi_id, struct xen_processor_performance *dom0_px_in ret = -ENOMEM; goto out; } - copy_from_guest(pxpt->states, dom0_px_info->states, - dom0_px_info->state_count); + if ( copy_from_guest(pxpt->states, dom0_px_info->states, + dom0_px_info->state_count) ) + { + ret = -EFAULT; + goto out; + } pxpt->state_count = dom0_px_info->state_count; if ( cpufreq_verbose ) |