ARM64: dts: rk3399-box-rev2: enable hdmi uboot logo display

[firefly-linux-kernel-4.4.55.git] / drivers / net / tun.c

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 6941f0888b0023e1eb0f4ca3647ee39e241e1776..63778be9e7689f99857668d868f8db8443d230bc 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1105,9 +1105,11 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
        }
 
        if (tun->flags & IFF_VNET_HDR) {
-               if (len < tun->vnet_hdr_sz)
+               int vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz);
+
+               if (len < vnet_hdr_sz)
                        return -EINVAL;
-               len -= tun->vnet_hdr_sz;
+               len -= vnet_hdr_sz;
 
                n = copy_from_iter(&gso, sizeof(gso), from);
                if (n != sizeof(gso))
@@ -1119,7 +1121,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
 
                if (tun16_to_cpu(tun, gso.hdr_len) > len)
                        return -EINVAL;
-               iov_iter_advance(from, tun->vnet_hdr_sz - sizeof(gso));
+               iov_iter_advance(from, vnet_hdr_sz - sizeof(gso));
        }
 
        if ((tun->flags & TUN_TYPE_MASK) == IFF_TAP) {
@@ -1298,7 +1300,7 @@ static ssize_t tun_put_user(struct tun_struct *tun,
                vlan_hlen = VLAN_HLEN;
 
        if (tun->flags & IFF_VNET_HDR)
-               vnet_hdr_sz = tun->vnet_hdr_sz;
+               vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz);
 
        total = skb->len + vlan_hlen + vnet_hdr_sz;