Patch "bonding: fix the err path for dev hwaddr sync in bond_enslave" has been added to the 4.9-stable tree

Patch "bonding: fix the err path for dev hwaddr sync in bond_enslave" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    bonding: fix the err path for dev hwaddr sync in bond_enslave

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     bonding-fix-the-err-path-for-dev-hwaddr-sync-in-bond_enslave.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr 11 10:26:56 CEST 2018
From: Xin Long <lucien.xin@gmail.com>
Date: Mon, 26 Mar 2018 01:16:45 +0800
Subject: bonding: fix the err path for dev hwaddr sync in bond_enslave

From: Xin Long <lucien.xin@gmail.com>


[ 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 <lucien.xin@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 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);


Patches currently in stable-queue which might be from lucien.xin@gmail.com are

queue-4.9/team-move-dev_mc_sync-after-master_upper_dev_link-in-team_port_add.patch
queue-4.9/bonding-process-the-err-returned-by-dev_set_allmulti-properly-in-bond_enslave.patch
queue-4.9/bonding-fix-the-err-path-for-dev-hwaddr-sync-in-bond_enslave.patch
queue-4.9/bonding-move-dev_mc_sync-after-master_upper_dev_link-in-bond_enslave.patch
queue-4.9/route-check-sysctl_fib_multipath_use_neigh-earlier-than-hash.patch
queue-4.9/sctp-fix-recursive-locking-warning-in-sctp_do_peeloff.patch