* Re: [PATCH] vhost_vdpa: switch to vmemdup_user()
[not found] <1605057288-60400-1-git-send-email-tiantao6@hisilicon.com>
@ 2020-11-11 10:50 ` Stefano Garzarella
0 siblings, 0 replies; only message in thread
From: Stefano Garzarella @ 2020-11-11 10:50 UTC (permalink / raw)
To: Tian Tao; +Cc: kvm, mst, netdev, linux-kernel, virtualization
On Wed, Nov 11, 2020 at 09:14:48AM +0800, Tian Tao wrote:
>Replace opencoded alloc and copy with vmemdup_user()
>
>Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
>---
> drivers/vhost/vdpa.c | 10 +++-------
> 1 file changed, 3 insertions(+), 7 deletions(-)
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
>
>diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
>index 2754f30..4c39583 100644
>--- a/drivers/vhost/vdpa.c
>+++ b/drivers/vhost/vdpa.c
>@@ -245,14 +245,10 @@ static long vhost_vdpa_set_config(struct vhost_vdpa *v,
> return -EFAULT;
> if (vhost_vdpa_config_validate(v, &config))
> return -EINVAL;
>- buf = kvzalloc(config.len, GFP_KERNEL);
>- if (!buf)
>- return -ENOMEM;
>
>- if (copy_from_user(buf, c->buf, config.len)) {
>- kvfree(buf);
>- return -EFAULT;
>- }
>+ buf = vmemdup_user(c->buf, config.len);
>+ if (IS_ERR(buf))
>+ return PTR_ERR(buf);
>
> ops->set_config(vdpa, config.off, buf, config.len);
>
>--
>2.7.4
>
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