Commit 942df4be authored by Wang Qing's avatar Wang Qing Committed by Heiko Carstens
Browse files

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: e06670c5 ("s390: vfio-ap: implement VFIO_DEVICE_GET_INFO ioctl")
Signed-off-by: default avatarWang Qing <wangqing@vivo.com>
Reviewed-by: default avatarTony Krowiak <akrowiak@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/1614600502-16714-1-git-send-email-wangqing@vivo.com


Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 51c44bab

drivers/s390/crypto/vfio_ap_ops.c

+1 −1
Original line number Diff line number Diff line
@@ -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,