From c17e26ddc79596230834345be80fcad6c619e9ec Mon Sep 17 00:00:00 2001 From: Hangbin Liu Date: Wed, 9 Oct 2019 20:18:28 +0800 Subject: [PATCH] team: call RCU read lock when walking the port_list Before reading the team port list, we need to acquire the RCU read lock. Also change list_for_each_entry() to list_for_each_entry_rcu(). v2: repost the patch to net-next and remove fixes flag as this is a cosmetic change. Suggested-by: Paolo Abeni Signed-off-by: Hangbin Liu Acked-by: Paolo Abeni Acked-by: Jiri Pirko Signed-off-by: Jakub Kicinski --- drivers/net/team/team.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index e8089def5a46..cb1d5fe60c31 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -2066,7 +2066,8 @@ static int team_ethtool_get_link_ksettings(struct net_device *dev, cmd->base.duplex = DUPLEX_UNKNOWN; cmd->base.port = PORT_OTHER; - list_for_each_entry(port, &team->port_list, list) { + rcu_read_lock(); + list_for_each_entry_rcu(port, &team->port_list, list) { if (team_port_txable(port)) { if (port->state.speed != SPEED_UNKNOWN) speed += port->state.speed; @@ -2075,6 +2076,8 @@ static int team_ethtool_get_link_ksettings(struct net_device *dev, cmd->base.duplex = port->state.duplex; } } + rcu_read_unlock(); + cmd->base.speed = speed ? : SPEED_UNKNOWN; return 0; -- 2.30.2