diff options
| -rw-r--r-- | samples/vfio-mdev/mtty.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 1fc57a5093a7..975af5bbf28d 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -1180,7 +1180,10 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd, memcpy(&mdev_state->dev_info, &info, sizeof(info)); - return copy_to_user((void __user *)arg, &info, minsz); + if (copy_to_user((void __user *)arg, &info, minsz)) + return -EFAULT; + + return 0; } case VFIO_DEVICE_GET_REGION_INFO: { @@ -1201,7 +1204,10 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd, if (ret) return ret; - return copy_to_user((void __user *)arg, &info, minsz); + if (copy_to_user((void __user *)arg, &info, minsz)) + return -EFAULT; + + return 0; } case VFIO_DEVICE_GET_IRQ_INFO: @@ -1224,7 +1230,10 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd, if (info.count == -1) return -EINVAL; - return copy_to_user((void __user *)arg, &info, minsz); + if (copy_to_user((void __user *)arg, &info, minsz)) + return -EFAULT; + + return 0; } case VFIO_DEVICE_SET_IRQS: { |