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authorWang Qing <wangqing@vivo.com>2021-03-01 15:08:21 +0300
committerHeiko Carstens <hca@linux.ibm.com>2021-03-08 12:46:29 +0300
commit942df4be7ab40195e2a839e9de81951a5862bc5b (patch)
tree526696d08ada5eb2a2e2aa119e777656360aa292 /drivers/s390
parent51c44babdc19aaf882e1213325a0ba291573308f (diff)
downloadlinux-942df4be7ab40195e2a839e9de81951a5862bc5b.tar.xz
s390/crypto: 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: 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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/crypto/vfio_ap_ops.c2
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 41fc2e4135fe..1ffdd411201c 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1286,7 +1286,7 @@ 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,