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authorMichal Kubeček <mkubecek@suse.cz>2013-09-09 21:45:04 +0200
committerDavid S. Miller <davem@davemloft.net>2013-09-11 17:04:09 -0400
commit2c861cc65ef4604011a0082e4dcdba2819aa191a (patch)
treed6fe5436cf4d492c727cfb370232c87254d72097 /net/ipv6
parent444fa88ac35aa1bf9b7c23945444bc67f631033b (diff)
ipv6: don't call fib6_run_gc() until routing is ready
When loading the ipv6 module, ndisc_init() is called before ip6_route_init(). As the former registers a handler calling fib6_run_gc(), this opens a window to run the garbage collector before necessary data structures are initialized. If a network device is initialized in this window, adding MAC address to it triggers a NETDEV_CHANGEADDR event, leading to a crash in fib6_clean_all(). Take the event handler registration out of ndisc_init() into a separate function ndisc_late_init() and move it after ip6_route_init(). Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/af_inet6.c6
-rw-r--r--net/ipv6/ndisc.c18
2 files changed, 17 insertions, 7 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 136fe55c1a47..7c96100b021e 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -915,6 +915,9 @@ static int __init inet6_init(void)
err = ip6_route_init();
if (err)
goto ip6_route_fail;
+ err = ndisc_late_init();
+ if (err)
+ goto ndisc_late_fail;
err = ip6_flowlabel_init();
if (err)
goto ip6_flowlabel_fail;
@@ -981,6 +984,8 @@ ipv6_exthdrs_fail:
addrconf_fail:
ip6_flowlabel_cleanup();
ip6_flowlabel_fail:
+ ndisc_late_cleanup();
+ndisc_late_fail:
ip6_route_cleanup();
ip6_route_fail:
#ifdef CONFIG_PROC_FS
@@ -1043,6 +1048,7 @@ static void __exit inet6_exit(void)
ipv6_exthdrs_exit();
addrconf_cleanup();
ip6_flowlabel_cleanup();
+ ndisc_late_cleanup();
ip6_route_cleanup();
#ifdef CONFIG_PROC_FS
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 12179457b2cd..f8a55ff1971b 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1727,24 +1727,28 @@ int __init ndisc_init(void)
if (err)
goto out_unregister_pernet;
#endif
- err = register_netdevice_notifier(&ndisc_netdev_notifier);
- if (err)
- goto out_unregister_sysctl;
out:
return err;
-out_unregister_sysctl:
#ifdef CONFIG_SYSCTL
- neigh_sysctl_unregister(&nd_tbl.parms);
out_unregister_pernet:
-#endif
unregister_pernet_subsys(&ndisc_net_ops);
goto out;
+#endif
}
-void ndisc_cleanup(void)
+int __init ndisc_late_init(void)
+{
+ return register_netdevice_notifier(&ndisc_netdev_notifier);
+}
+
+void ndisc_late_cleanup(void)
{
unregister_netdevice_notifier(&ndisc_netdev_notifier);
+}
+
+void ndisc_cleanup(void)
+{
#ifdef CONFIG_SYSCTL
neigh_sysctl_unregister(&nd_tbl.parms);
#endif