linux-kernel - Re: [PATCH V4] net: dsa: mt7530: Add of_node_put() before break and return statements

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Message-Id: <20200825.074842.773732876988634467.davem@davemloft.net>
Date:   Tue, 25 Aug 2020 07:48:42 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     sylphrenadin@...il.com
Cc:     Julia.Lawall@...6.fr, andrew@...n.ch, sean.wang@...iatek.com,
        vivien.didelot@...il.com, f.fainelli@...il.com, kuba@...nel.org,
        matthias.bgg@...il.com, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4] net: dsa: mt7530: Add of_node_put() before break
 and return statements

From: Sumera Priyadarsini <sylphrenadin@...il.com>
Date: Tue, 25 Aug 2020 01:33:11 +0530

> 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 and return statements.
> 
> Issue found with Coccinelle.
> 
> Signed-off-by: Sumera Priyadarsini <sylphrenadin@...il.com>

Applied, thank you.