diff options
| author | Antonio Quartulli <antonio@meshcoding.com> | 2015-08-04 22:26:19 +0200 |
|---|---|---|
| committer | Antonio Quartulli <antonio@meshcoding.com> | 2015-08-27 20:15:33 +0200 |
| commit | a5256f7e74d85d7ae60ac3bd557d5fe3444be810 (patch) | |
| tree | b85fb2810f6855173f81868d768d1ba91a0c8bc1 | |
| parent | 07c48eca1661decbd52393ef535f0c97e5313c4e (diff) | |
| download | linux-a5256f7e74d85d7ae60ac3bd557d5fe3444be810.tar.bz2 | |
batman-adv: don't access unregistered net_device object
In batadv_hardif_disable_interface() there is a call to
batadv_softif_destroy_sysfs() which in turns invokes
unregister_netdevice() on the soft_iface.
After this point we cannot rely on the soft_iface object
anymore because it might get free'd by the netdev periodic
routine at any time.
For this reason the netdev_upper_dev_unlink(.., soft_iface) call
is moved before the invocation of batadv_softif_destroy_sysfs() so
that we can be sure that the soft_iface object is still valid.
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
| -rw-r--r-- | net/batman-adv/hard-interface.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index f4a15d2e5eaf..0565b20bfa6d 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -528,6 +528,8 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, batadv_purge_outstanding_packets(bat_priv, hard_iface); dev_put(hard_iface->soft_iface); + netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); + /* nobody uses this interface anymore */ if (!bat_priv->num_ifaces) { batadv_gw_check_client_stop(bat_priv); @@ -536,7 +538,6 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, batadv_softif_destroy_sysfs(hard_iface->soft_iface); } - netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); hard_iface->soft_iface = NULL; batadv_hardif_free_ref(hard_iface); |