From: Paul Blakey paulb@nvidia.com
commit b069e14fff46c8da9fcc79957f8acaa3e2dfdb6b upstream.
__mlx5_tc_ct_entry_put() queues release of tuple related to some ct FT, if that is the last reference to that tuple, the actual deletion of the tuple can happen after the FT is already destroyed and freed.
Flush the used workqueue before destroying the ct FT.
Fixes: a2173131526d ("net/mlx5e: CT: manage the lifetime of the ct entry object") Reviewed-by: Oz Shlomo ozsh@nvidia.com Signed-off-by: Paul Blakey paulb@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c @@ -1739,6 +1739,8 @@ mlx5_tc_ct_flush_ft_entry(void *ptr, voi static void mlx5_tc_ct_del_ft_cb(struct mlx5_tc_ct_priv *ct_priv, struct mlx5_ct_ft *ft) { + struct mlx5e_priv *priv; + if (!refcount_dec_and_test(&ft->refcount)) return;
@@ -1748,6 +1750,8 @@ mlx5_tc_ct_del_ft_cb(struct mlx5_tc_ct_p rhashtable_free_and_destroy(&ft->ct_entries_ht, mlx5_tc_ct_flush_ft_entry, ct_priv); + priv = netdev_priv(ct_priv->netdev); + flush_workqueue(priv->wq); mlx5_tc_ct_free_pre_ct_tables(ft); mapping_remove(ct_priv->zone_mapping, ft->zone_restore_id); kfree(ft);