diff options
| author |   Wang Qing <wangqing@vivo.com> | 2021-03-01 20:01:33 +0800 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2021-03-08 10:46:29 +0100 |
| commit | 51c44babdc19aaf882e1213325a0ba291573308f (patch) | |
| tree | e672a65cdca9dc3cfa5bdb5ece9dbf63e58afa00 /drivers/s390 | |
| parent | s390/cpumf: rename header file to hwctrset.h (diff) | |
| download | wireguard-linux-51c44babdc19aaf882e1213325a0ba291573308f.tar.xz wireguard-linux-51c44babdc19aaf882e1213325a0ba291573308f.zip | |
s390/cio: return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.
Fixes: e01bcdd61320 ("vfio: ccw: realize VFIO_DEVICE_GET_REGION_INFO ioctl")
Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/1614600093-13992-1-git-send-email-wangqing@vivo.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_ops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 68106be4ba7a..557d0b888cd3 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -543,7 +543,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev, if (ret) return ret; - return copy_to_user((void __user *)arg, &info, minsz); + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; } case VFIO_DEVICE_GET_REGION_INFO: { @@ -561,7 +561,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev, if (ret) return ret; - return copy_to_user((void __user *)arg, &info, minsz); + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; } case VFIO_DEVICE_GET_IRQ_INFO: { |