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 <anto...@meshcoding.com>
Signed-off-by: Marek Lindner <mareklind...@neomailbox.ch>
---
net/batman-adv/hard-interface.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index f4a15d2..0565b20 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);
--
2.5.0
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