linux-kernel - [PATCH v2,net] net: mana: Fix error handling in mana_create

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Date:   Fri,  8 Oct 2021 06:11:31 -0700
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     linux-hyperv@...r.kernel.org, netdev@...r.kernel.org
Cc:     haiyangz@...rosoft.com, kys@...rosoft.com, sthemmin@...rosoft.com,
        paulros@...rosoft.com, shacharr@...rosoft.com, olaf@...fle.de,
        vkuznets@...hat.com, davem@...emloft.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2,net] net: mana: Fix error handling in mana_create_rxq()

Fix error handling in mana_create_rxq() when
cq->gdma_id >= gc->max_num_cqs.

Fixes: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)")
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 drivers/net/ethernet/microsoft/mana/mana_en.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 9a871192ca96..d65697c239c8 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1477,8 +1477,10 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
 	if (err)
 		goto out;
 
-	if (cq->gdma_id >= gc->max_num_cqs)
+	if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
+		err = -EINVAL;
 		goto out;
+	}
 
 	gc->cq_table[cq->gdma_id] = cq->gdma_cq;
 
-- 
2.25.1