drivers/net/bonding/bond_3ad: return when there's no aggregator

Otherwise we would dereference a NULL aggregator pointer when calling
__set_agg_ports_ready on the line below.

Found by Linux Verification Center (linuxtesting.org) with the SVACE
static analysis tool.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 455b555..c99ffe6 100644 (file)
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1549,6 +1549,7 @@ static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
                        slave_err(bond->dev, port->slave->dev,
                                  "Port %d did not find a suitable aggregator\n",
                                  port->actor_port_number);
+                       return;
                }
        }
        /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE