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authorAlexey Dobriyan <adobriyan@gmail.com>2008-11-23 17:26:26 -0800
committerDavid S. Miller <davem@davemloft.net>2008-11-23 17:26:26 -0800
commitbe77e5930725c3e77bcc0fb1def28e016080d0a1 (patch)
treef0bfe670f5ef785567db3b65afc244b7664200c1
parentc25eb3bfb97294d0543a81230fbc237046b4b84c (diff)
net: fix tunnels in netns after ndo_ changes
dev_net_set() should be the very first thing after alloc_netdev(). "ndo_" changes turned simple assignment (which is OK to do before netns assignment) into quite non-trivial operation (which is not OK, init_net was used). This leads to incomplete initialisation of tunnel device in netns. BUG: unable to handle kernel NULL pointer dereference at 00000004 IP: [<c02efdb5>] ip6_tnl_exit_net+0x37/0x4f *pde = 00000000 Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC last sysfs file: /sys/class/net/lo/operstate Pid: 10, comm: netns Not tainted (2.6.28-rc6 #1) EIP: 0060:[<c02efdb5>] EFLAGS: 00010246 CPU: 0 EIP is at ip6_tnl_exit_net+0x37/0x4f EAX: 00000000 EBX: 00000020 ECX: 00000000 EDX: 00000003 ESI: c5caef30 EDI: c782bbe8 EBP: c7909f50 ESP: c7909f48 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 Process netns (pid: 10, ti=c7908000 task=c7905780 task.ti=c7908000) Stack: c03e75e0 c7390bc8 c7909f60 c0245448 c7390bd8 c7390bf0 c7909fa8 c012577a 00000000 00000002 00000000 c0125736 c782bbe8 c7909f90 c0308fe3 c782bc04 c7390bd4 c0245406 c084b718 c04f0770 c03ad785 c782bbe8 c782bc04 c782bc0c Call Trace: [<c0245448>] ? cleanup_net+0x42/0x82 [<c012577a>] ? run_workqueue+0xd6/0x1ae [<c0125736>] ? run_workqueue+0x92/0x1ae [<c0308fe3>] ? schedule+0x275/0x285 [<c0245406>] ? cleanup_net+0x0/0x82 [<c0125ae1>] ? worker_thread+0x81/0x8d [<c0128344>] ? autoremove_wake_function+0x0/0x33 [<c0125a60>] ? worker_thread+0x0/0x8d [<c012815c>] ? kthread+0x39/0x5e [<c0128123>] ? kthread+0x0/0x5e [<c0103b9f>] ? kernel_thread_helper+0x7/0x10 Code: db e8 05 ff ff ff 89 c6 e8 dc 04 f6 ff eb 08 8b 40 04 e8 38 89 f5 ff 8b 44 9e 04 85 c0 75 f0 43 83 fb 20 75 f2 8b 86 84 00 00 00 <8b> 40 04 e8 1c 89 f5 ff e8 98 04 f6 ff 89 f0 e8 f8 63 e6 ff 5b EIP: [<c02efdb5>] ip6_tnl_exit_net+0x37/0x4f SS:ESP 0068:c7909f48 ---[ end trace 6c2f2328fccd3e0c ]--- Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ip_gre.c2
-rw-r--r--net/ipv4/ipip.c2
-rw-r--r--net/ipv6/ip6_tunnel.c2
-rw-r--r--net/ipv6/sit.c2
4 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index bf5b338f134..0101521f366 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1268,9 +1268,9 @@ static int ipgre_init_net(struct net *net)
err = -ENOMEM;
goto err_alloc_dev;
}
+ dev_net_set(ign->fb_tunnel_dev, net);
ipgre_fb_tunnel_init(ign->fb_tunnel_dev);
- dev_net_set(ign->fb_tunnel_dev, net);
ign->fb_tunnel_dev->rtnl_link_ops = &ipgre_link_ops;
if ((err = register_netdev(ign->fb_tunnel_dev)))
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 9eb437cb821..5079dfbc6f3 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -793,9 +793,9 @@ static int ipip_init_net(struct net *net)
err = -ENOMEM;
goto err_alloc_dev;
}
+ dev_net_set(ipn->fb_tunnel_dev, net);
ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
- dev_net_set(ipn->fb_tunnel_dev, net);
if ((err = register_netdev(ipn->fb_tunnel_dev)))
goto err_reg_dev;
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 358f001d848..ef249ab5c93 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1428,9 +1428,9 @@ static int ip6_tnl_init_net(struct net *net)
if (!ip6n->fb_tnl_dev)
goto err_alloc_dev;
+ dev_net_set(ip6n->fb_tnl_dev, net);
ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev);
- dev_net_set(ip6n->fb_tnl_dev, net);
err = register_netdev(ip6n->fb_tnl_dev);
if (err < 0)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 1ebf99a6776..d3467e563f0 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1025,9 +1025,9 @@ static int sit_init_net(struct net *net)
err = -ENOMEM;
goto err_alloc_dev;
}
+ dev_net_set(sitn->fb_tunnel_dev, net);
ipip6_fb_tunnel_init(sitn->fb_tunnel_dev);
- dev_net_set(sitn->fb_tunnel_dev, net);
if ((err = register_netdev(sitn->fb_tunnel_dev)))
goto err_reg_dev;