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From:   Sumera Priyadarsini <sylphrenadin@gmail.com>
To:     davem@davemloft.net
Cc:     Julia.Lawall@lip6.fr, andrew@lunn.ch, sean.wang@mediatek.com,
        vivien.didelot@gmail.com, f.fainelli@gmail.com, kuba@kernel.org,
        matthias.bgg@gmail.com, netdev@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        Sumera Priyadarsini <sylphrenadin@gmail.com>
Subject: [PATCH] net: dsa: Add of_node_put() before break statement
Date:   Sun, 23 Aug 2020 19:31:16 +0530
Message-Id: <20200823140116.6606-1-sylphrenadin@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Every iteration of for_each_child_of_node() decrements
the reference count of the previous node, however when control
is transferred from the middle of the loop, as in the case of
a return or break or goto, there is no decrement thus ultimately
resulting in a memory leak.

Fix a potential memory leak in mt7530.c by inserting of_node_put()
before the break statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
---
 drivers/net/dsa/mt7530.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 8dcb8a49ab67..af83e5034842 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1334,6 +1334,7 @@ mt7530_setup(struct dsa_switch *ds)
 				if (id == 4)
 					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;
 			}
+			of_node_put(mac_np);
 			of_node_put(phy_node);
 			break;
 		}
-- 
2.17.1