From: Hangbin Liu <liuhangbin@xxxxxxxxx>
[ Upstream commit c17e26ddc79596230834345be80fcad6c619e9ec ]
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 <pabeni@xxxxxxxxxx>
Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Acked-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Acked-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 8156b33ee3e79..ca70a1d840eb3 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2074,7 +2074,8 @@ 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;
@@ -2083,6 +2084,8 @@ 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;
--
2.20.1
