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Date: Fri, 22 Mar 2019 11:04:07 +0800 From: Wen Yang <wen.yang99@....com.cn> To: linux-kernel@...r.kernel.org Cc: wang.yi59@....com.cn, Wen Yang <wen.yang99@....com.cn>, Anirudha Sarangi <anirudh@...inx.com>, John Linn <John.Linn@...inx.com>, "David S. Miller" <davem@...emloft.net>, Michal Simek <michal.simek@...inx.com>, netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: [PATCH 1/3] net: xilinx: fix possible object reference leak The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./drivers/net/ethernet/xilinx/xilinx_axienet_main.c:1624:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1569, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@....com.cn> Cc: Anirudha Sarangi <anirudh@...inx.com> Cc: John Linn <John.Linn@...inx.com> Cc: "David S. Miller" <davem@...emloft.net> Cc: Michal Simek <michal.simek@...inx.com> Cc: netdev@...r.kernel.org Cc: linux-arm-kernel@...ts.infradead.org Cc: linux-kernel@...r.kernel.org --- drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index ec7e7ec..4041c75 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1575,12 +1575,14 @@ static int axienet_probe(struct platform_device *pdev) ret = of_address_to_resource(np, 0, &dmares); if (ret) { dev_err(&pdev->dev, "unable to get DMA resource\n"); + of_node_put(np); goto free_netdev; } lp->dma_regs = devm_ioremap_resource(&pdev->dev, &dmares); if (IS_ERR(lp->dma_regs)) { dev_err(&pdev->dev, "could not map DMA regs\n"); ret = PTR_ERR(lp->dma_regs); + of_node_put(np); goto free_netdev; } lp->rx_irq = irq_of_parse_and_map(np, 1); -- 2.9.5
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