From: Alex Williamson <alex.williamson@redhat.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [patch 3/3] vfio: return -EFAULT on failure
Date: Thu, 28 Jun 2012 16:25:21 -0600 [thread overview]
Message-ID: <1340922321.3179.59.camel@ul30vt> (raw)
In-Reply-To: <20120628064524.GC11107@elgon.mountain>
On Thu, 2012-06-28 at 09:45 +0300, Dan Carpenter wrote:
> This ioctl function is supposed to return a negative error code or zero
> on success. copy_to_user() returns zero or the number of bytes
> remaining to be copied.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
> index 457acf3..1aa373f 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -1159,6 +1159,8 @@ static long vfio_group_fops_unl_ioctl(struct file *filep,
> status.flags |= VFIO_GROUP_FLAGS_CONTAINER_SET;
>
> ret = copy_to_user((void __user *)arg, &status, minsz);
> + if (ret)
> + ret = -EFAULT;
>
> break;
> }
Yes, thank you! I've folded all of these into the commits on my next
branch, so they should be cleaned up in tomorrow's tree. Thanks for the
reports, please let me know if you find more.
Alex
prev parent reply other threads:[~2012-06-28 22:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-26 4:55 Request VFIO inclusion in linux-next Alex Williamson
2012-06-26 23:50 ` Stephen Rothwell
[not found] ` <1340686552.1207.128.camel-xdHQ/5r00wBBDLzU/O5InQ@public.gmane.org>
2012-06-26 21:17 ` Benjamin Herrenschmidt
2012-06-27 12:37 ` Dan Carpenter
2012-06-27 19:23 ` Alex Williamson
[not found] ` <1340825003.1207.224.camel-xdHQ/5r00wBBDLzU/O5InQ@public.gmane.org>
2012-06-28 6:44 ` Dan Carpenter
2012-07-02 3:41 ` Alexey Kardashevskiy
[not found] ` <4FF11855.2060605-sLpHqDYs0B2HXe+LvDLADg@public.gmane.org>
2012-07-02 4:14 ` Alex Williamson
2012-06-28 6:44 ` [patch 1/3] vfio: signedness bug in vfio_config_do_rw() Dan Carpenter
2012-06-28 6:44 ` [patch 2/3] vfio: make count unsigned to prevent integer underflow Dan Carpenter
2012-06-28 22:24 ` Alex Williamson
2012-06-28 6:45 ` [patch 3/3] vfio: return -EFAULT on failure Dan Carpenter
2012-06-28 22:25 ` Alex Williamson [this message]
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