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authorDan Carpenter <dan.carpenter@oracle.com>2020-12-02 09:44:43 +0300
committerMichael S. Tsirkin <mst@redhat.com>2020-12-02 12:36:40 +0300
commit2c602741b51daa12f8457f222ce9ce9c4825d067 (patch)
treee2fecdf55e0f458b58b665593b43644cb7d30bac /drivers/vhost
parent98701a2a861fa87a5055cf2809758e8725e8b146 (diff)
downloadlinux-2c602741b51daa12f8457f222ce9ce9c4825d067.tar.xz
vhost_vdpa: return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining to be copied but this should return -EFAULT to the user. Fixes: 1b48dc03e575 ("vhost: vdpa: report iova range") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/X8c32z5EtDsMyyIL@mwanda Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'drivers/vhost')
-rw-r--r--drivers/vhost/vdpa.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index f2db99031e2f..29ed4173f04e 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -348,7 +348,9 @@ static long vhost_vdpa_get_iova_range(struct vhost_vdpa *v, u32 __user *argp)
.last = v->range.last,
};
- return copy_to_user(argp, &range, sizeof(range));
+ if (copy_to_user(argp, &range, sizeof(range)))
+ return -EFAULT;
+ return 0;
}
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,