net/mlx4_en: Validate VLAN IDs provided in ethtool flow steering rules

When attaching flow steering rules via Ethtool accept only valid vlans IDs e.g
in the range: [0,4095].

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 86afb5b0e0fa..f33049f9bfe7 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -669,6 +669,10 @@ static int mlx4_en_validate_flow(struct net_device *dev,
                     !(cmd->fs.m_ext.vlan_tci == 0 ||
                       cmd->fs.m_ext.vlan_tci == cpu_to_be16(0xfff)))
                         return -EINVAL;
+                if (cmd->fs.m_ext.vlan_tci) {
+                        if (be16_to_cpu(cmd->fs.h_ext.vlan_tci) >= VLAN_N_VID)
+                                return -EINVAL;
+                }
         }
 
         return 0;