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bonding: disallow enslaving a bond to itself

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Enslaving a bond to itself leads to an endless loop and hangs the kernel.

Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Tested-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Bohac 2014-02-26 18:20:13 +01:00 committed by David S. Miller
parent ee6154e11e
commit 09a89c219b
1 changed files with 5 additions and 0 deletions
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5
drivers/net/bonding/bond_main.c
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@ -1197,6 +1197,11 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
return -EBUSY;
}
if (bond_dev == slave_dev) {
pr_err("%s: cannot enslave bond to itself.\n", bond_dev->name);
return -EPERM;
}
/* vlan challenged mutual exclusion */
/* no need to lock since we're protected by rtnl_lock */
if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {