netdev - [PATCH net-next-2.6] ipip: fix percpu stats accounting

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 28 Sep 2010 11:56:46 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6] ipip: fix percpu stats accounting

commit 3c97af99a5aa1 (ipip: percpu stats accounting) forgot the fallback
tunnel case (tunl0), and can crash pretty fast.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 net/ipv4/ipip.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 12b6fde..9e78f11 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -789,7 +789,7 @@ static int ipip_tunnel_init(struct net_device *dev)
 	return 0;
 }
 
-static void __net_init ipip_fb_tunnel_init(struct net_device *dev)
+static int __net_init ipip_fb_tunnel_init(struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct iphdr *iph = &tunnel->parms.iph;
@@ -802,8 +802,13 @@ static void __net_init ipip_fb_tunnel_init(struct net_device *dev)
 	iph->protocol		= IPPROTO_IPIP;
 	iph->ihl		= 5;
 
+	dev->tstats = alloc_percpu(struct pcpu_tstats);
+	if (!dev->tstats)
+		return -ENOMEM;
+
 	dev_hold(dev);
 	rcu_assign_pointer(ipn->tunnels_wc[0], tunnel);
+	return 0;
 }
 
 static struct xfrm_tunnel ipip_handler __read_mostly = {
@@ -852,7 +857,9 @@ static int __net_init ipip_init_net(struct net *net)
 	}
 	dev_net_set(ipn->fb_tunnel_dev, net);
 
-	ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
+	err = ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
+	if (err)
+		goto err_reg_dev;
 
 	if ((err = register_netdev(ipn->fb_tunnel_dev)))
 		goto err_reg_dev;
@@ -860,7 +867,7 @@ static int __net_init ipip_init_net(struct net *net)
 	return 0;
 
 err_reg_dev:
-	free_netdev(ipn->fb_tunnel_dev);
+	ipip_dev_free(ipn->fb_tunnel_dev);
 err_alloc_dev:
 	/* nothing */
 	return err;


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html