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Subject[PATCH 4.15 166/168] team: move dev_mc_sync after master_upper_dev_link in team_port_add
Date
4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

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


[ Upstream commit 982cf3b3999d39a2eaca0a65542df33c19b5d814 ]

The same fix as in 'bonding: move dev_mc_sync after master_upper_dev_link
in bond_enslave' is needed for team driver.

The panic can be reproduced easily:

ip link add team1 type team
ip link set team1 up
ip link add link team1 vlan1 type vlan id 80
ip link set vlan1 master team1

Fixes: cb41c997d444 ("team: team should sync the port's uc/mc addrs when add a port")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/team/team.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -1197,11 +1197,6 @@ static int team_port_add(struct team *te
goto err_dev_open;
}

- netif_addr_lock_bh(dev);
- dev_uc_sync_multiple(port_dev, dev);
- dev_mc_sync_multiple(port_dev, dev);
- netif_addr_unlock_bh(dev);
-
err = vlan_vids_add_by_dev(port_dev, dev);
if (err) {
netdev_err(dev, "Failed to add vlan ids to device %s\n",
@@ -1241,6 +1236,11 @@ static int team_port_add(struct team *te
goto err_option_port_add;
}

+ netif_addr_lock_bh(dev);
+ dev_uc_sync_multiple(port_dev, dev);
+ dev_mc_sync_multiple(port_dev, dev);
+ netif_addr_unlock_bh(dev);
+
port->index = -1;
list_add_tail_rcu(&port->list, &team->port_list);
team_port_enable(team, port);
@@ -1265,8 +1265,6 @@ err_enable_netpoll:
vlan_vids_del_by_dev(port_dev, dev);

err_vids_add:
- dev_uc_unsync(port_dev, dev);
- dev_mc_unsync(port_dev, dev);
dev_close(port_dev);

err_dev_open:

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