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Commit dd4080ee authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

sit: fix percpu stats accounting 



commit 15fc1f70 (sit: percpu stats accounting) forgot the fallback
tunnel case (sit0), and can crash pretty fast.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fada5636

net/ipv6/sit.c

+11 −3
Original line number Diff line number Diff line
@@ -1160,7 +1160,7 @@ static int ipip6_tunnel_init(struct net_device *dev) 
	return 0;

}



static void __net_init ipip6_fb_tunnel_init(struct net_device *dev)

static int __net_init ipip6_fb_tunnel_init(struct net_device *dev)

{

	struct ip_tunnel *tunnel = netdev_priv(dev);

	struct iphdr *iph = &tunnel->parms.iph;
@@ -1175,8 +1175,12 @@ static void __net_init ipip6_fb_tunnel_init(struct net_device *dev) 
	iph->ihl		= 5;

	iph->ttl		= 64;



	dev->tstats = alloc_percpu(struct pcpu_tstats);

	if (!dev->tstats)

		return -ENOMEM;

	dev_hold(dev);

	sitn->tunnels_wc[0]	= tunnel;

	return 0;

}



static struct xfrm_tunnel sit_handler __read_mostly = {
@@ -1220,7 +1224,10 @@ static int __net_init sit_init_net(struct net *net) 
	}

	dev_net_set(sitn->fb_tunnel_dev, net);



	ipip6_fb_tunnel_init(sitn->fb_tunnel_dev);

	err = ipip6_fb_tunnel_init(sitn->fb_tunnel_dev);

	if (err)

		goto err_dev_free;



	ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn);



	if ((err = register_netdev(sitn->fb_tunnel_dev)))
@@ -1230,7 +1237,8 @@ static int __net_init sit_init_net(struct net *net) 


err_reg_dev:

	dev_put(sitn->fb_tunnel_dev);

	free_netdev(sitn->fb_tunnel_dev);

err_dev_free:

	ipip6_dev_free(sitn->fb_tunnel_dev);

err_alloc_dev:

	return err;

}