[PATCH 5.10 098/290] s390/cio: return -EFAULT if copy_to_user() fails
From: gregkh@linuxfoundation.org
Date: 2021-03-15 14:25:06
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From: Eric Farman <farman@linux.ibm.com>
commit d9c48a948d29bcb22f4fe61a81b718ef6de561a0 upstream.
Fixes: 120e214e504f ("vfio: ccw: realize VFIO_DEVICE_G(S)ET_IRQ_INFO ioctls")
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/s390/cio/vfio_ccw_ops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/s390/cio/vfio_ccw_ops.c
+++ b/drivers/s390/cio/vfio_ccw_ops.c@@ -578,7 +578,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struc if (info.count == -1) return -EINVAL; - return copy_to_user((void __user *)arg, &info, minsz); + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; } case VFIO_DEVICE_SET_IRQS: {