vfio: fix ioctl error handling

[thirdparty/kernel/stable.git] / drivers / vfio / pci / vfio_pci.c

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 2760a7ba3f309d1a344781c2f9a4eb6c3b3ff4aa..8c80a48e32335346e426547fa5007e179ff7cec7 100644 (file)
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -446,7 +446,8 @@ static long vfio_pci_ioctl(void *device_data,
                info.num_regions = VFIO_PCI_NUM_REGIONS;
                info.num_irqs = VFIO_PCI_NUM_IRQS;
 
-               return copy_to_user((void __user *)arg, &info, minsz);
+               return copy_to_user((void __user *)arg, &info, minsz) ?
+                       -EFAULT : 0;
 
        } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) {
                struct pci_dev *pdev = vdev->pdev;
@@ -520,7 +521,8 @@ static long vfio_pci_ioctl(void *device_data,
                        return -EINVAL;
                }
 
-               return copy_to_user((void __user *)arg, &info, minsz);
+               return copy_to_user((void __user *)arg, &info, minsz) ?
+                       -EFAULT : 0;
 
        } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
                struct vfio_irq_info info;
@@ -555,7 +557,8 @@ static long vfio_pci_ioctl(void *device_data,
                else
                        info.flags |= VFIO_IRQ_INFO_NORESIZE;
 
-               return copy_to_user((void __user *)arg, &info, minsz);
+               return copy_to_user((void __user *)arg, &info, minsz) ?
+                       -EFAULT : 0;
 
        } else if (cmd == VFIO_DEVICE_SET_IRQS) {
                struct vfio_irq_set hdr;