From: Hangbin Liu liuhangbin@gmail.com
[ 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@redhat.com Signed-off-by: Hangbin Liu liuhangbin@gmail.com Acked-by: Paolo Abeni pabeni@redhat.com Acked-by: Jiri Pirko jiri@mellanox.com Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 8156b33ee3e7..ca70a1d840eb 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;