xfrm: fix error flow in case of add state fails

If add state fails in case of device offload, netdev refcount
will be negative since gc task is attempting to dev_free this state.
This is fixed by putting NULL in state dev field.

Signed-off-by: Aviad Yehezkel <aviadye@mellanox.com>
Signed-off-by: Boris Pismeny <borisp@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 30e5746085b8fcfc5aa8abc7a8a23753c510a630..ac9477189d1cc2e9013af88d549fa075144d4e8c 100644 (file)
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -102,6 +102,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 
        err = dev->xfrmdev_ops->xdo_dev_state_add(x);
        if (err) {
+               xso->dev = NULL;
                dev_put(dev);
                return err;
        }