linux-kernel - [PATCH 4.19 005/219] net: gemini: Fix memory leak in gmac_setup

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Message-Id: <20191229162509.837005119@linuxfoundation.org>
Date:   Sun, 29 Dec 2019 18:16:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 005/219] net: gemini: Fix memory leak in gmac_setup_txqs

From: Navid Emamdoost <navid.emamdoost@...il.com>

[ Upstream commit f37f710353677639bc5d37ee785335994adf2529 ]

In the implementation of gmac_setup_txqs() the allocated desc_ring is
leaked if TX queue base is not aligned. Release it via
dma_free_coherent.

Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/cortina/gemini.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -577,6 +577,8 @@ static int gmac_setup_txqs(struct net_de
 
 	if (port->txq_dma_base & ~DMA_Q_BASE_MASK) {
 		dev_warn(geth->dev, "TX queue base is not aligned\n");
+		dma_free_coherent(geth->dev, len * sizeof(*desc_ring),
+				  desc_ring, port->txq_dma_base);
 		kfree(skb_tab);
 		return -ENOMEM;
 	}