ifb: should not use __dev_get_by_index() without locks

At this point (ri_tasklet()), RTNL or dev_base_lock are not held,
we must use dev_get_by_index() instead of __dev_get_by_index()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index 801f088c134f..030913f8bd26 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -98,12 +98,13 @@ static void ri_tasklet(unsigned long dev)
                 stats->tx_packets++;
                 stats->tx_bytes +=skb->len;
 
-                skb->dev = __dev_get_by_index(&init_net, skb->iif);
+                skb->dev = dev_get_by_index(&init_net, skb->iif);
                 if (!skb->dev) {
                         dev_kfree_skb(skb);
                         stats->tx_dropped++;
                         break;
                 }
+                dev_put(skb->dev);
                 skb->iif = _dev->ifindex;
 
                 if (from & AT_EGRESS) {