linux-kernel - Re: [EXT] [PATCH] ethernet: atheros: fix a memleak in atl1e_setup_ring

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Message-ID: <20231207094220.77019dd0@kernel.org>
Date:   Thu, 7 Dec 2023 09:42:20 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Suman Ghosh <sumang@...vell.com>
Cc:     Zhipeng Lu <alexious@....edu.cn>,
        Chris Snook <chris.snook@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Simon Horman <horms@...nel.org>,
        Yuanjun Gong <ruc_gongyuanjun@....com>,
        Jie Yang <jie.yang@...eros.com>,
        Jeff Garzik <jgarzik@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [EXT] [PATCH] ethernet: atheros: fix a memleak in
 atl1e_setup_ring_resources

On Thu, 7 Dec 2023 17:08:15 +0000 Suman Ghosh wrote:
> >+		kfree(tx_ring->tx_buffer);  
>
> [Suman] I think we should do tx_ring->tx_buffer = NULL also, to avoid use after free?

It's up to the driver. Some may call that defensive programming.