linux-kernel - Re: [PATCH] s390: cio: Return -EFAULT if copy_to

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Message-ID: <YDzob/k70ix1g0s+@osiris>
Date:   Mon, 1 Mar 2021 14:13:19 +0100
From:   Heiko Carstens <hca@...ux.ibm.com>
To:     Wang Qing <wangqing@...o.com>
Cc:     Cornelia Huck <cohuck@...hat.com>,
        Eric Farman <farman@...ux.ibm.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Vineeth Vijayan <vneethv@...ux.ibm.com>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        linux-s390@...r.kernel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] s390: cio: Return -EFAULT if copy_to_user() fails

On Mon, Mar 01, 2021 at 08:01:33PM +0800, Wang Qing wrote:
> 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.
> 
> Signed-off-by: Wang Qing <wangqing@...o.com>
> ---
>  drivers/s390/cio/vfio_ccw_ops.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks!