linux-kernel - Re: [net PATCH v2] net: ethernet: stmicro: stmmac: fix possible memory leak in __stmmac

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Message-ID: <ZIoSSgNr2qus5Ok9@corigine.com>
Date:   Wed, 14 Jun 2023 21:17:30 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jose Abreu <Jose.Abreu@...opsys.com>, stable@...r.kernel.org
Subject: Re: [net PATCH v2] net: ethernet: stmicro: stmmac: fix possible
 memory leak in __stmmac_open

On Wed, Jun 14, 2023 at 11:17:14AM +0200, Christian Marangi wrote:
> Fix a possible memory leak in __stmmac_open when stmmac_init_phy fails.
> It's also needed to free everything allocated by stmmac_setup_dma_desc
> and not just the dma_conf struct.
> 
> Drop free_dma_desc_resources from __stmmac_open and correctly call
> free_dma_desc_resources on each user of __stmmac_open on error.
> 
> Reported-by: Jose Abreu <Jose.Abreu@...opsys.com>
> Fixes: ba39b344e924 ("net: ethernet: stmicro: stmmac: generate stmmac dma conf before open")
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> Cc: stable@...r.kernel.org

Reviewed-by: Simon Horman <simon.horman@...igine.com>