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  1. 31 Oct, 2007 4 commits
    • Daniel Lezcano's avatar
      [IPV6]: remove duplicate call to proc_net_remove · 1675c7b2
      Daniel Lezcano authored 
      The file /proc/net/if_inet6 is removed twice.
First time in:
        inet6_exit
             ->addrconf_cleanup
And followed a few lines after by:
        inet6_exit
             -> if6_proc_exit
Signed-off-by: default avatarDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1675c7b2
    • Daniel Lezcano's avatar
      [NETNS]: fix net released by rcu callback · 310928d9
      Daniel Lezcano authored 
      When a network namespace reference is held by a network subsystem,
and when this reference is decremented in a rcu update callback, we
must ensure that there is no more outstanding rcu update before
trying to free the network namespace.

In the normal case, the rcu_barrier is called when the network namespace
is exiting in the cleanup_net function.

But when a network namespace creation fails, and the subsystems are
undone (like the cleanup), the rcu_barrier is missing.

This patch adds the missing rcu_barrier.
Signed-off-by: default avatarDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      310928d9
    • Daniel Lezcano's avatar
      [NET]: Fix free_netdev on register_netdev failure. · 93ee31f1
      Daniel Lezcano authored 
      Point 1:
The unregistering of a network device schedule a netdev_run_todo.
This function calls dev->destructor when it is set and the
destructor calls free_netdev.

Point 2:
In the case of an initialization of a network device the usual code
is:
 * alloc_netdev
 * register_netdev
    -> if this one fails, call free_netdev and exit with error.

Point 3:
In the register_netdevice function at the later state, when the device
is at the registered state, a call to the netdevice_notifiers is made.
If one of the notification falls into an error, a rollback to the
registered state is done using unregister_netdevice.

Conclusion:
When a network device fails to register during initialization because
one network subsystem returned an error during a notification call
chain, the network device is freed twice because of fact 1 and fact 2.
The second free_netdev will be done with an invalid pointer.

Proposed solution:
The following patch move all the code of unregister_netdevice *except*
the call to net_set_todo, to a new function "rollback_registered".

The following functions are changed in this way:
 * register_netdevice: calls rollback_registered when a notification fails
 * unregister_netdevice: calls rollback_register + net_set_todo, the call
                         order to net_set_todo is changed because it is the
                         latest now. Since it justs add an element to a list
                         that should not break anything.
Signed-off-by: default avatarDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      93ee31f1
    • Adrian Bunk's avatar
      [WAN]: fix drivers/net/wan/lmc/ compilation · 5c41542b
      Adrian Bunk authored 
      Signed-off-by: default avatarAdrian Bunk <bunk@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5c41542b
  3. 30 Oct, 2007 36 commits
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