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netns: do not leak net_generic data on failed init

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ops_init should free the net_generic data on
init failure and __register_pernet_operations should not
call ops_free when NET_NS is not enabled.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2012-04-16 04:43:15 +00:00 committed by David S. Miller
parent 9fe5642f4a
commit b922934d01
1 changed files with 18 additions and 15 deletions
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31
net/core/net_namespace.c
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@ -83,21 +83,29 @@ static int net_assign_generic(struct net *net, int id, void *data)
static int ops_init(const struct pernet_operations *ops, struct net *net)
{
int err;
int err = -ENOMEM;
void *data = NULL;
if (ops->id && ops->size) {
void *data = kzalloc(ops->size, GFP_KERNEL);
data = kzalloc(ops->size, GFP_KERNEL);
if (!data)
return -ENOMEM;
goto out;
err = net_assign_generic(net, *ops->id, data);
if (err) {
kfree(data);
return err;
}
if (err)
goto cleanup;
}
err = 0;
if (ops->init)
return ops->init(net);
err = ops->init(net);
if (!err)
return 0;
cleanup:
kfree(data);
out:
return err;
}
static void ops_free(const struct pernet_operations *ops, struct net *net)
@ -448,12 +456,7 @@ static void __unregister_pernet_operations(struct pernet_operations *ops)
static int __register_pernet_operations(struct list_head *list,
struct pernet_operations *ops)
{
int err = 0;
err = ops_init(ops, &init_net);
if (err)
ops_free(ops, &init_net);
return err;
return ops_init(ops, &init_net);
}
static void __unregister_pernet_operations(struct pernet_operations *ops)