From: David Miller <davem@davemloft.net>
To: wen.yang99@zte.com.cn
Cc: linux-kernel@vger.kernel.org, xue.zhihong@zte.com.cn,
wang.yi59@zte.com.cn, cheng.shengyu@zte.com.cn,
anirudh@xilinx.com, John.Linn@xilinx.com,
michal.simek@xilinx.com, hancock@sedsystems.ca,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] net: axienet: fix a potential double free in axienet_probe()
Date: Mon, 08 Jul 2019 16:32:35 -0700 (PDT) [thread overview]
Message-ID: <20190708.163235.455094269982602106.davem@davemloft.net> (raw)
In-Reply-To: <1562384321-46727-1-git-send-email-wen.yang99@zte.com.cn>
From: Wen Yang <wen.yang99@zte.com.cn>
Date: Sat, 6 Jul 2019 11:38:41 +0800
> There is a possible use-after-free issue in the axienet_probe():
>
> 1701: np = of_parse_phandle(pdev->dev.of_node, "axistream-connected", 0);
> 1702: if (np) {
> ...
> 1787: of_node_put(np); ---> released here
> 1788: lp->eth_irq = platform_get_irq(pdev, 0);
> 1789: } else {
> ...
> 1801: }
> 1802: if (IS_ERR(lp->dma_regs)) {
> ...
> 1805: of_node_put(np); ---> double released here
> 1806: goto free_netdev;
> 1807: }
>
> We solve this problem by removing the unnecessary of_node_put().
>
> Fixes: 28ef9ebdb64c ("net: axienet: make use of axistream-connected attribute optional")
> Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Applied to net-next
prev parent reply other threads:[~2019-07-08 23:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-06 3:38 [PATCH] net: axienet: fix a potential double free in axienet_probe() Wen Yang
2019-07-08 16:02 ` Robert Hancock
2019-07-08 23:32 ` David Miller [this message]
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