[PATCH 4.9 290/310] bonding: fix the err path for dev hwaddr sync in bond_enslave

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

--

From: Xin Long 


[ Upstream commit 5c78f6bfae2b10ff70e21d343e64584ea6280c26 ]

vlan_vids_add_by_dev is called right after dev hwaddr sync, so on
the err path it should unsync dev hwaddr. Otherwise, the slave
dev's hwaddr will never be unsync when this err happens.

Fixes: 1ff412ad7714 ("bonding: change the bond's vlan syncing functions with 
the standard ones")
Signed-off-by: Xin Long 
Reviewed-by: Nikolay Aleksandrov 
Acked-by: Andy Gospodarek 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman 
---
 drivers/net/bonding/bond_main.c |9 +
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1561,7 +1561,7 @@ int bond_enslave(struct net_device *bond
if (res) {
netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
   slave_dev->name);
-   goto err_close;
+   goto err_hwaddr_unsync;
}
 
prev_slave = bond_last_slave(bond);
@@ -1749,9 +1749,6 @@ err_unregister:
netdev_rx_handler_unregister(slave_dev);
 
 err_detach:
-   if (!bond_uses_primary(bond))
-   bond_hw_addr_flush(bond_dev, slave_dev);
-
vlan_vids_del_by_dev(slave_dev, bond_dev);
if (rcu_access_pointer(bond->primary_slave) == new_slave)
RCU_INIT_POINTER(bond->primary_slave, NULL);
@@ -1765,6 +1762,10 @@ err_detach:
synchronize_rcu();
slave_disable_netpoll(new_slave);
 
+err_hwaddr_unsync:
+   if (!bond_uses_primary(bond))
+   bond_hw_addr_flush(bond_dev, slave_dev);
+
 err_close:
slave_dev->priv_flags &= ~IFF_BONDING;
dev_close(slave_dev);

[PATCH 4.9 290/310] bonding: fix the err path for dev hwaddr sync in bond_enslave

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

--

From: Xin Long 


[ Upstream commit 5c78f6bfae2b10ff70e21d343e64584ea6280c26 ]

vlan_vids_add_by_dev is called right after dev hwaddr sync, so on
the err path it should unsync dev hwaddr. Otherwise, the slave
dev's hwaddr will never be unsync when this err happens.

Fixes: 1ff412ad7714 ("bonding: change the bond's vlan syncing functions with 
the standard ones")
Signed-off-by: Xin Long 
Reviewed-by: Nikolay Aleksandrov 
Acked-by: Andy Gospodarek 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman 
---
 drivers/net/bonding/bond_main.c |9 +
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1561,7 +1561,7 @@ int bond_enslave(struct net_device *bond
if (res) {
netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
   slave_dev->name);
-   goto err_close;
+   goto err_hwaddr_unsync;
}
 
prev_slave = bond_last_slave(bond);
@@ -1749,9 +1749,6 @@ err_unregister:
netdev_rx_handler_unregister(slave_dev);
 
 err_detach:
-   if (!bond_uses_primary(bond))
-   bond_hw_addr_flush(bond_dev, slave_dev);
-
vlan_vids_del_by_dev(slave_dev, bond_dev);
if (rcu_access_pointer(bond->primary_slave) == new_slave)
RCU_INIT_POINTER(bond->primary_slave, NULL);
@@ -1765,6 +1762,10 @@ err_detach:
synchronize_rcu();
slave_disable_netpoll(new_slave);
 
+err_hwaddr_unsync:
+   if (!bond_uses_primary(bond))
+   bond_hw_addr_flush(bond_dev, slave_dev);
+
 err_close:
slave_dev->priv_flags &= ~IFF_BONDING;
dev_close(slave_dev);