From 7a7fa2891df4ec4af0c34f3bbd203e1376e83951 Mon Sep 17 00:00:00 2001
From: Nelson Escobar <neescoba@cisco.com>
Date: Thu, 17 Mar 2016 15:49:58 -0700
Subject: [PATCH 15/22]     enic: fix crash when allocating too many queues

    Add checks to make sure we don't try to allocate more tx or rx queues
    than we support.

    Fixes: fefed3d1e62c ("enic: new driver")

    Signed-off-by: Nelson Escobar <neescoba@cisco.com>
    Reviewed-by: John Daley <johndale@cisco.com>
---
 drivers/net/enic/enic_ethdev.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index 6f2ada5..6c3c734 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -174,6 +174,13 @@ static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
 	struct enic *enic = pmd_priv(eth_dev);
 
 	ENICPMD_FUNC_TRACE();
+	if (queue_idx >= ENIC_WQ_MAX) {
+		dev_err(enic,
+			"Max number of TX queues exceeded.  Max is %d\n",
+			ENIC_WQ_MAX);
+		return -EINVAL;
+	}
+
 	eth_dev->data->tx_queues[queue_idx] = (void *)&enic->wq[queue_idx];
 
 	ret = enic_alloc_wq(enic, queue_idx, socket_id, nb_desc);
@@ -262,6 +269,13 @@ static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
 	struct enic *enic = pmd_priv(eth_dev);
 
 	ENICPMD_FUNC_TRACE();
+	if (queue_idx >= ENIC_RQ_MAX) {
+		dev_err(enic,
+			"Max number of RX queues exceeded.  Max is %d\n",
+			ENIC_RQ_MAX);
+		return -EINVAL;
+	}
+
 	eth_dev->data->rx_queues[queue_idx] = (void *)&enic->rq[queue_idx];
 
 	ret = enic_alloc_rq(enic, queue_idx, socket_id, mp, nb_desc);
-- 
1.9.1