diff options
| author | Tom Parkin <tparkin@katalix.com> | 2012-10-29 23:41:48 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-17 13:14:25 -0800 |
| commit | 5a3e425d67aab6b6f0b3bd3fb372b8044b8e981b (patch) | |
| tree | ad81ab86f5ba8b81660d53ef46f47f6e57657a8e /net | |
| parent | 798c7dba9071df9cdd935da16066e1a17580d9ee (diff) | |
l2tp: fix oops in l2tp_eth_create() error path
[ Upstream commit 789336360e0a2aeb9750c16ab704a02cbe035e9e ]
When creating an L2TPv3 Ethernet session, if register_netdev() should fail for
any reason (for example, automatic naming for "l2tpeth%d" interfaces hits the
32k-interface limit), the netdev is freed in the error path. However, the
l2tp_eth_sess structure's dev pointer is left uncleared, and this results in
l2tp_eth_delete() then attempting to unregister the same netdev later in the
session teardown. This results in an oops.
To avoid this, clear the session dev pointer in the error path.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/l2tp/l2tp_eth.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c index 2cef50b5fc67..64164fbf6c51 100644 --- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -269,6 +269,7 @@ static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 p out_del_dev: free_netdev(dev); + spriv->dev = NULL; out_del_session: l2tp_session_delete(session); out: |