[PATCH v3 net 1/4] net: hns3: fix vector resource leak in hns3_nic_alloc_vector_data

When devm_kcalloc() fails for priv->tqp_vector after get_vector() has
already acquired MSI-X vectors, the error path returns without calling
put_vector() to release them, leaving the hclge/hclgevf bookkeeping
(num_msi_used, num_msi_left, vector_status[]) inconsistent.

Call put_vector() for every acquired vector before returning the
error, and reset priv->vector_num to 0 to avoid a NULL deref in the
subsequent hns3_nic_dealloc_vector_data(), which iterates
priv->tqp_vector (still NULL after the kcalloc failure) using
priv->vector_num.

Fixes: dd38c72604dc ("net: hns3: fix for coalesce configuration lost during reset")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
Changes in v3:
  - Simplify commit message: drop the accumulated-leak consequence
    paragraph and clarify that the vector_num reset avoids a NULL
    deref in hns3_nic_dealloc_vector_data().
v2: https://lore.kernel.org/all/20261021121426.3096838-2-shaojijie@huawei.com/ (local)
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 47788be64be6..2f3aeade558c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -4854,7 +4854,7 @@ static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
 			     GFP_KERNEL);
 	if (!priv->tqp_vector) {
 		ret = -ENOMEM;
-		goto out;
+		goto err_put_vector;
 	}
 
 	for (i = 0; i < priv->vector_num; i++) {

@@ -4865,7 +4865,13 @@ static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
 		hns3_vector_coalesce_init(tqp_vector, priv);
 	}
 
-out:
+	devm_kfree(&pdev->dev, vector);
+	return 0;
+
+err_put_vector:
+	for (i = 0; i < vector_num; i++)
+		h->ae_algo->ops->put_vector(h, vector[i].vector);
+	priv->vector_num = 0;
 	devm_kfree(&pdev->dev, vector);
 	return ret;
 }

-- 
2.43.0