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macvlan: Fix memleak on device removal/crash on module removal 

As noticed by Ben Greear, macvlan crashes the kernel when unloading the
module. The reason is that it tries to clean up the macvlan_port pointer
on the macvlan device itself instead of the underlying device. A non-NULL
pointer is taken as indication that the macvlan_handle_frame_hook is
valid, when receiving the next packet on the underlying device it tries
to call the NULL hook and crashes.

Clean up the macvlan_port on the correct device to fix this.

Signed-off-by; Patrick McHardy <kaber@trash.net>
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-05-08 01:13:31 -07:00 committed by David S. Miller
parent c67fa02799
commit 7312096454
1 changed files with 1 additions and 1 deletions
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2
drivers/net/macvlan.c
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@ -450,7 +450,7 @@ static void macvlan_dellink(struct net_device *dev)
unregister_netdevice(dev);
if (list_empty(&port->vlans))
macvlan_port_destroy(dev);
macvlan_port_destroy(port->dev);
}
static struct rtnl_link_ops macvlan_link_ops __read_mostly = {