net/mlx5: E-Switch, Protect from invalid memory access in offload fdb table

The esw offloads structures share a union with the legacy mode structs.
Reset the offloads struct to zero in init to protect from null
assumptions made by the legacy mode code.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index f2260391be5b952478175de9be8235b3154c4ccf..9b2d78ee22b88333fcc0b043d4234c340dcb3c32 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -1611,6 +1611,7 @@ static int esw_offloads_steering_init(struct mlx5_eswitch *esw, int nvports)
 {
        int err;
 
+       memset(&esw->fdb_table.offloads, 0, sizeof(struct offloads_fdb));
        mutex_init(&esw->fdb_table.offloads.fdb_prio_lock);
 
        err = esw_create_offloads_fdb_tables(esw, nvports);