The mlx5_rxq_new function creates control structure and if it from shared group, it is inserted into the shared RXQs list.
After that, there are some validations which in case they fail, RxQ control object is released. In these cases, invalid pointer to the object still in the list, and access it may cause a crash. Move the list insertion to the end of the function where the RxQ control object is surely valid. Fixes: 09c2555303be ("net/mlx5: support shared Rx queue") Cc: sta...@dpdk.org Signed-off-by: Michael Baum <michae...@nvidia.com> Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com> --- drivers/net/mlx5/mlx5_rxq.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c index 580d7ae868..fe72cf49d3 100644 --- a/drivers/net/mlx5/mlx5_rxq.c +++ b/drivers/net/mlx5/mlx5_rxq.c @@ -1719,12 +1719,6 @@ mlx5_rxq_new(struct rte_eth_dev *dev, struct mlx5_rxq_priv *rxq, return NULL; } LIST_INIT(&tmpl->owners); - if (conf->share_group > 0) { - tmpl->rxq.shared = 1; - tmpl->share_group = conf->share_group; - tmpl->share_qid = conf->share_qid; - LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry); - } rxq->ctrl = tmpl; LIST_INSERT_HEAD(&tmpl->owners, rxq, owner_entry); MLX5_ASSERT(n_seg && n_seg <= MLX5_MAX_RXQ_NSEG); @@ -1933,6 +1927,12 @@ mlx5_rxq_new(struct rte_eth_dev *dev, struct mlx5_rxq_priv *rxq, tmpl->rxq.mprq_bufs = (struct mlx5_mprq_buf *(*)[desc])(*tmpl->rxq.elts + desc_n); tmpl->rxq.idx = idx; + if (conf->share_group > 0) { + tmpl->rxq.shared = 1; + tmpl->share_group = conf->share_group; + tmpl->share_qid = conf->share_qid; + LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry); + } LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next); return tmpl; error: -- 2.25.1