From patchwork Fri Feb 22 07:15:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 10825331 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 EDA19922 for ; Fri, 22 Feb 2019 07:16:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3FC32E53C for ; Fri, 22 Feb 2019 07:16:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C7AB22E6E2; Fri, 22 Feb 2019 07:16:37 +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=unavailable 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 C789C2E53C for ; Fri, 22 Feb 2019 07:16:36 +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:References: In-Reply-To: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:List-Owner; bh=Vj9WJ9rA4WYGn1G3LaYpGvYLFCo1Ut8EkFExVaRbC+4=; b=mySZS2+Zq29TOYXDgxsi5HxSV9 8m/nPjLTyRAJ891Lxr1Ev4CGPTxZwxhWWEy4PJI2vjUJli51gXUO5A4R45N/PvbIxbMLYxO3xy0LH pMMBxa+YZO+BGwiBWhr9VSXdLmrsmfwGx++6atPd8g9mEEHgVp9qILOeUjf1MOscM1rpPRnds/n4S mA+Np6mt6hj65+G7prlWOvOm3BFx8KM2CPiPSWmz4zTGg49ReJbEtShTH8Gkl/TuvpkuvuM/i/8aq 0wcbtWrFfJeoKkfhxAvQN1RBN2rnCod9EW0krQuPL2RYYShHIUeZETnaKsRuIqfYkD27fuBn0PhwG pDcKz/2g==; 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 1gx54R-0002zq-88; Fri, 22 Feb 2019 07:16:31 +0000 Received: from out1.zte.com.cn ([202.103.147.172] helo=mxct.zte.com.cn) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gx53q-0002Nt-Pc; Fri, 22 Feb 2019 07:15:58 +0000 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id 1CE6E30B3A56BFC8A583; Fri, 22 Feb 2019 15:15:48 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id x1M7FZ3u037479; Fri, 22 Feb 2019 15:15:35 +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 2019022215161343-1228965 ; Fri, 22 Feb 2019 15:16:13 +0800 From: Wen Yang To: linus.walleij@linaro.org Subject: [PATCH 5/5] net: dsa: fix a leaked reference by adding missing of_node_put Date: Fri, 22 Feb 2019 15:15:42 +0800 Message-Id: <1550819742-32155-5-git-send-email-wen.yang99@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1550819742-32155-1-git-send-email-wen.yang99@zte.com.cn> References: <1550819742-32155-1-git-send-email-wen.yang99@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2019-02-22 15:16:13, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2019-02-22 15:15:19, Serialize complete at 2019-02-22 15:15:19 X-MAIL: mse01.zte.com.cn x1M7FZ3u037479 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190221_231554_997287_6EADDBF1 X-CRM114-Status: GOOD ( 13.88 ) 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, andrew@lunn.ch, alexandre.belloni@bootlin.com, f.fainelli@gmail.com, michal.simek@xilinx.com, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, Wen Yang , matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, anirudh@xilinx.com, lorenzo.bianconi83@gmail.com, UNGLinuxDriver@microchip.com, John.Linn@xilinx.com, vivien.didelot@gmail.com, kvalo@codeaurora.org, nbd@nbd.name 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: ./net/dsa/port.c:294:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 284, but without a corresponding object release within this function. ./net/dsa/dsa2.c:627:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:630:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:636:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:639:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. Signed-off-by: Wen Yang Cc: Andrew Lunn Cc: Vivien Didelot Cc: Florian Fainelli Cc: "David S. Miller" Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- net/dsa/dsa2.c | 16 ++++++++++------ net/dsa/port.c | 1 + 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 8c431e0..89823f0 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -613,7 +613,7 @@ static int dsa_switch_parse_ports_of(struct dsa_switch *ds, struct device_node *ports, *port; struct dsa_port *dp; u32 reg; - int err; + int err = 0; ports = of_get_child_by_name(dn, "ports"); if (!ports) { @@ -624,19 +624,23 @@ static int dsa_switch_parse_ports_of(struct dsa_switch *ds, for_each_available_child_of_node(ports, port) { err = of_property_read_u32(port, "reg", ®); if (err) - return err; + goto out_put_node; - if (reg >= ds->num_ports) - return -EINVAL; + if (reg >= ds->num_ports) { + err = -EINVAL; + goto out_put_node; + } dp = &ds->ports[reg]; err = dsa_port_parse_of(dp, port); if (err) - return err; + goto out_put_node; } - return 0; +out_put_node: + of_node_put(ports); + return err; } static int dsa_switch_parse_member_of(struct dsa_switch *ds, diff --git a/net/dsa/port.c b/net/dsa/port.c index 2d7e01b..a6d9a04 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -291,6 +291,7 @@ static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) return ERR_PTR(-EPROBE_DEFER); } + of_node_put(phy_dn); return phydev; }