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From: Michael Baum <>
Subject: [dpdk-stable] [PATCH] net/mlx5: fix iterator type in Rx queue management
Date: Wed, 24 Jun 2020 14:06:58 +0000
Message-ID: <> (raw)

The mlx5_check_vec_rx_support function in the mlx5_rxtx_vec.c file
passes the RX queues array in the loop. Similarly, the mlx5_mprq_enabled
function in the mlx5_rxq.c file passes the RX queues array in the loop.

In both cases, the iterator of the loop is called i and the variable
representing the array size is called rxqs_n.
The i variable is of UINT16_T type while the rxqs_n variable is of
unsigned int type. The size of the rxqs_n variable is much larger than
the number of iterations allowed by the i type, theoretically there may
be a situation where the value of the rxqs_n will be greater than can be
represented by 16 bits and the loop will never end.

Change the type of i to UINT32_T.

Fixes: 7d6bf6b866b8 ("net/mlx5: add Multi-Packet Rx support")
Fixes: 6cb559d67b83 ("net/mlx5: add vectorized Rx/Tx burst for x86")

Signed-off-by: Michael Baum <>
Acked-by: Matan Azrad <>
 drivers/net/mlx5/mlx5_rxq.c      | 2 +-
 drivers/net/mlx5/mlx5_rxtx_vec.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 bd0037b..b436f06 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -108,7 +108,7 @@
 mlx5_mprq_enabled(struct rte_eth_dev *dev)
 	struct mlx5_priv *priv = dev->data->dev_private;
-	uint16_t i;
+	uint32_t i;
 	uint16_t n = 0;
 	uint16_t n_ibv = 0;
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec.c b/drivers/net/mlx5/mlx5_rxtx_vec.c
index b38bd20..7fae201 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec.c
+++ b/drivers/net/mlx5/mlx5_rxtx_vec.c
@@ -156,7 +156,7 @@
 mlx5_check_vec_rx_support(struct rte_eth_dev *dev)
 	struct mlx5_priv *priv = dev->data->dev_private;
-	uint16_t i;
+	uint32_t i;
 	if (!priv->config.rx_vec_en)
 		return -ENOTSUP;

             reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-24 14:06 Michael Baum [this message]
2020-06-29  8:45 ` [dpdk-stable] [dpdk-dev] " Raslan Darawsheh
  -- strict thread matches above, loose matches on Subject: below --
2020-06-24 14:13 [dpdk-stable] " Michael Baum
2020-06-24 13:58 Michael Baum
2020-06-24 13:50 Michael Baum
2020-06-24 13:40 Michael Baum
2020-06-24 13:25 Michael Baum

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