From patchwork Fri Mar 22 03:04:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 10864859 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A6E5F922 for ; Fri, 22 Mar 2019 03:05:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A29B2A4DB for ; Fri, 22 Mar 2019 03:05:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A4FE2A4E6; Fri, 22 Mar 2019 03:05:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 043E12A4DB for ; Fri, 22 Mar 2019 03:05:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=xQMvFf10IuF4/cVO/DshUQohBZtoWUjyv1553vwxvqs=; b=Q1o VAdYFSbRBmcrWbKXJ0EfqlHjmDcHMuZhw4R085ngUTYUO1OO3/a659bnIFGPV5Ku02sGOPm54DDZ7 mO9Xs7CPeB7xm6JI2k/8PA9BJVx0kRIErPTFfjQqc5s2tIBNyWTaoFUfrihFpz3ZKjw8CSVRLSq5p GgBxNyEcRETJtzkZcB9NGnmtoX+lwdVm/PoKiJ2bFU6n8uTo42z2sBYhwRyTyXlZCbDHwMjHb29P+ grG4Urbv9uArmqNRbt/nNz1T8cs6xcr3T/TYWucfC3k9phPBgJVACDJpZkG8ZkShmFLiofPM5KJyq 5Hd4yMTzF0ngIScV6XdeFfDEqEad4kw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h7AUb-0007Tt-Kn; Fri, 22 Mar 2019 03:05:13 +0000 Received: from mxhk.zte.com.cn ([63.217.80.70]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h7AUX-0006BW-Ms for linux-arm-kernel@lists.infradead.org; Fri, 22 Mar 2019 03:05:11 +0000 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id 4BB96B1EEEED4A8E878F; Fri, 22 Mar 2019 11:04:57 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id x2M342FN071184; Fri, 22 Mar 2019 11:04:02 +0800 (GMT-8) (envelope-from wen.yang99@zte.com.cn) Received: from fox-host8.localdomain ([10.74.120.8]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2019032211043805-5922596 ; Fri, 22 Mar 2019 11:04:38 +0800 From: Wen Yang To: linux-kernel@vger.kernel.org Subject: [PATCH 1/3] net: xilinx: fix possible object reference leak Date: Fri, 22 Mar 2019 11:04:07 +0800 Message-Id: <1553223849-7143-1-git-send-email-wen.yang99@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2019-03-22 11:04:38, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2019-03-22 11:03:47, Serialize complete at 2019-03-22 11:03:47 X-MAIL: mse01.zte.com.cn x2M342FN071184 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190321_200509_918061_DDBB579F X-CRM114-Status: GOOD ( 10.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wang.yi59@zte.com.cn, netdev@vger.kernel.org, Michal Simek , Wen Yang , Anirudha Sarangi , John Linn , "David S. Miller" , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Cc: Anirudha Sarangi Cc: John Linn Cc: "David S. Miller" Cc: Michal Simek Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.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);