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| author | Wang Qing <wangqing@vivo.com> | 2021-03-01 20:08:21 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 17:03:39 +0100 |
| commit | d5fc9c5d64ca3f15b0b6a77b70f41ad5331ca3a8 (patch) | |
| tree | a89a37f198d837769428ee156c5ef937f146cf36 /drivers/s390 | |
| parent | 72ba965bf10de9e041820b6a2e23721645853407 (diff) | |
| download | linux-d5fc9c5d64ca3f15b0b6a77b70f41ad5331ca3a8.tar.gz linux-d5fc9c5d64ca3f15b0b6a77b70f41ad5331ca3a8.tar.bz2 linux-d5fc9c5d64ca3f15b0b6a77b70f41ad5331ca3a8.zip | |
s390/crypto: return -EFAULT if copy_to_user() fails
commit 942df4be7ab40195e2a839e9de81951a5862bc5b upstream.
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: e06670c5fe3b ("s390: vfio-ap: implement VFIO_DEVICE_GET_INFO ioctl")
Signed-off-by: Wang Qing <wangqing@vivo.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/1614600502-16714-1-git-send-email-wangqing@vivo.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/crypto/vfio_ap_ops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 790b0b2b3627..1ec01148018f 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1279,7 +1279,7 @@ static int vfio_ap_mdev_get_device_info(unsigned long arg) info.num_regions = 0; info.num_irqs = 0; - return copy_to_user((void __user *)arg, &info, minsz); + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; } static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, |