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vhost_vdpa: switch to vmemdup_user() 

Replace opencoded alloc and copy with vmemdup_user()

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Link: https://lore.kernel.org/r/1605057288-60400-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
zero-sugar-mainline-defconfig
Tian Tao 2020-11-11 09:14:48 +08:00 committed by Michael S. Tsirkin
parent 3711387a75
commit 0ab4b8901a
1 changed files with 3 additions and 7 deletions
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10
drivers/vhost/vdpa.c
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@ -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);