This is a note to let you know that I've just added the patch titled s390/cio: return -EFAULT if copy_to_user() fails to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: s390-cio-return-efault-if-copy_to_user-fails-take-2.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d9c48a948d29bcb22f4fe61a81b718ef6de561a0 Mon Sep 17 00:00:00 2001 From: Eric Farman <farman@xxxxxxxxxxxxx> Date: Mon, 1 Mar 2021 19:33:24 +0100 Subject: s390/cio: return -EFAULT if copy_to_user() fails From: Eric Farman <farman@xxxxxxxxxxxxx> commit d9c48a948d29bcb22f4fe61a81b718ef6de561a0 upstream. Fixes: 120e214e504f ("vfio: ccw: realize VFIO_DEVICE_G(S)ET_IRQ_INFO ioctls") Signed-off-by: Eric Farman <farman@xxxxxxxxxxxxx> Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -383,7 +383,7 @@ 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: { Patches currently in stable-queue which might be from farman@xxxxxxxxxxxxx are queue-4.14/s390-cio-return-efault-if-copy_to_user-fails-take-2.patch