[dpdk-stable] patch 'net/mlx5: fix Rx/Tx queue checks' has been queued to stable release 20.11.3

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/28/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/a20d4d2506d1b91c2e1ed5c10261a77d2ab115e0

Thanks.

Luca Boccassi

---
>From a20d4d2506d1b91c2e1ed5c10261a77d2ab115e0 Mon Sep 17 00:00:00 2001
From: Dmitry Kozlyuk <dkozlyuk at nvidia.com>
Date: Tue, 20 Jul 2021 10:53:35 +0300
Subject: [PATCH] net/mlx5: fix Rx/Tx queue checks

[ upstream commit 94e257ec8ca82a98e38ffb9e7c117a8aac554489 ]

When device configuration was interrupted by a signal,
mlx5_rxq/txq_release() could access yet unitinialized array
and crash the application. Add checks whether queue array
is initialized.

Fixes: a1366b1a2be3 ("net/mlx5: add reference counter on DPDK Rx queues")
Fixes: 6e78005a9b30 ("net/mlx5: add reference counter on DPDK Tx queues")

Signed-off-by: Dmitry Kozlyuk <dkozlyuk at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/net/mlx5/mlx5_rxq.c | 2 +-
 drivers/net/mlx5/mlx5_txq.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 6207dae8b5..edf91254b1 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -1782,7 +1782,7 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
 	struct mlx5_priv *priv = dev->data->dev_private;
 	struct mlx5_rxq_ctrl *rxq_ctrl;
 
-	if (!(*priv->rxqs)[idx])
+	if (priv->rxqs == NULL || (*priv->rxqs)[idx] == NULL)
 		return 0;
 	rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
 	if (__atomic_sub_fetch(&rxq_ctrl->refcnt, 1, __ATOMIC_RELAXED) > 1)
diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index c53af10d58..9ec7b57f1c 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -1238,7 +1238,7 @@ mlx5_txq_release(struct rte_eth_dev *dev, uint16_t idx)
 	struct mlx5_priv *priv = dev->data->dev_private;
 	struct mlx5_txq_ctrl *txq_ctrl;
 
-	if (!(*priv->txqs)[idx])
+	if (priv->txqs == NULL || (*priv->txqs)[idx] == NULL)
 		return 0;
 	txq_ctrl = container_of((*priv->txqs)[idx], struct mlx5_txq_ctrl, txq);
 	if (__atomic_sub_fetch(&txq_ctrl->refcnt, 1, __ATOMIC_RELAXED) > 1)
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-07-26 13:53:17.388961006 +0100
+++ 0030-net-mlx5-fix-Rx-Tx-queue-checks.patch	2021-07-26 13:53:15.861292875 +0100
@@ -1 +1 @@
-From 94e257ec8ca82a98e38ffb9e7c117a8aac554489 Mon Sep 17 00:00:00 2001
+From a20d4d2506d1b91c2e1ed5c10261a77d2ab115e0 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 94e257ec8ca82a98e38ffb9e7c117a8aac554489 ]
+
@@ -13 +14,0 @@
-Cc: stable at dpdk.org
@@ -23 +24 @@
-index dacffc9251..4a8b67e731 100644
+index 6207dae8b5..edf91254b1 100644
@@ -26 +27 @@
-@@ -1712,7 +1712,7 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
+@@ -1782,7 +1782,7 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
@@ -36 +37 @@
-index f68c0c61a9..eb4d34ca55 100644
+index c53af10d58..9ec7b57f1c 100644
@@ -39 +40 @@
-@@ -1246,7 +1246,7 @@ mlx5_txq_release(struct rte_eth_dev *dev, uint16_t idx)
+@@ -1238,7 +1238,7 @@ mlx5_txq_release(struct rte_eth_dev *dev, uint16_t idx)