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| author | Tom Parkin <tparkin@katalix.com> | 2012-10-29 23:41:48 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-02 21:56:35 -0400 |
| commit | 789336360e0a2aeb9750c16ab704a02cbe035e9e (patch) | |
| tree | 1568251a167183170cc25dd6aa5f1512f4e3d611 /net/l2tp | |
| parent | e3c98512780ae2cfb90be2152ab35294439bb7bb (diff) | |
| download | linux-789336360e0a2aeb9750c16ab704a02cbe035e9e.tar.gz linux-789336360e0a2aeb9750c16ab704a02cbe035e9e.tar.bz2 linux-789336360e0a2aeb9750c16ab704a02cbe035e9e.zip | |
l2tp: fix oops in l2tp_eth_create() error path
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>
Diffstat (limited to 'net/l2tp')
| -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 37b8b8ba31f7..76125c57ee6d 100644 --- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -291,6 +291,7 @@ 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: |