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authorJulian Anastasov <ja@ssi.bg>2012-04-16 04:43:15 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-27 09:51:21 -0700
commit0958c122f47f4ef2a1ae552fed56a8bf8502c32b (patch)
treefe2b05ff1c175836b1c407a948b0bdea4d3e9628
parent6a0e69cea2ec1499224067989470d3c929dbd67e (diff)
netns: do not leak net_generic data on failed init
[ Upstream commit b922934d017f1cc831b017913ed7d1a56c558b43 ] 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/core/net_namespace.c33
1 files changed, 18 insertions, 15 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 0b0211d7fc3e..2772ed11bec9 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -82,21 +82,29 @@ assign:
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);
- return 0;
+ 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)
@@ -446,12 +454,7 @@ 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)