Commit e381835c authored by Moni Shoua's avatar Moni Shoua Committed by Roland Dreier

IB/mlx4: Avoid null pointer dereference in mlx4_ib_scan_netdevs()

When Ethernet netdev is not present for a port (e.g. when the link
layer type of the port is InfiniBand) it's possible to dereference a
null pointer when we do netdevice scanning.

To fix that, we move a section of code that needs to run only when
netdev is present to a proper if () statement.

Fixes: ad4885d2 ("IB/mlx4: Build the port IBoE GID table properly under bonding")
Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarMoni Shoua <monis@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 4ff0acca
......@@ -1789,32 +1789,35 @@ static void mlx4_ib_scan_netdevs(struct mlx4_ib_dev *ibdev,
port_state = (netif_running(curr_netdev) && netif_carrier_ok(curr_netdev)) ?
IB_PORT_ACTIVE : IB_PORT_DOWN;
mlx4_ib_set_default_gid(ibdev, curr_netdev, port);
} else {
reset_gid_table(ibdev, port);
}
/* if using bonding/team and a slave port is down, we don't the bond IP
* based gids in the table since flows that select port by gid may get
* the down port.
/* if using bonding/team and a slave port is down, we
* don't the bond IP based gids in the table since
* flows that select port by gid may get the down port.
*/
if (curr_master && (port_state == IB_PORT_DOWN)) {
reset_gid_table(ibdev, port);
mlx4_ib_set_default_gid(ibdev, curr_netdev, port);
mlx4_ib_set_default_gid(ibdev,
curr_netdev, port);
}
/* if bonding is used it is possible that we add it to masters
* only after IP address is assigned to the net bonding
* interface.
/* if bonding is used it is possible that we add it to
* masters only after IP address is assigned to the
* net bonding interface.
*/
if (curr_master && (old_master != curr_master)) {
reset_gid_table(ibdev, port);
mlx4_ib_set_default_gid(ibdev, curr_netdev, port);
mlx4_ib_set_default_gid(ibdev,
curr_netdev, port);
mlx4_ib_get_dev_addr(curr_master, ibdev, port);
}
if (!curr_master && (old_master != curr_master)) {
reset_gid_table(ibdev, port);
mlx4_ib_set_default_gid(ibdev, curr_netdev, port);
mlx4_ib_set_default_gid(ibdev,
curr_netdev, port);
mlx4_ib_get_dev_addr(curr_netdev, ibdev, port);
}
} else {
reset_gid_table(ibdev, port);
}
}
spin_unlock(&iboe->lock);
......
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