From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8DE9C43381 for ; Wed, 27 Mar 2019 18:03:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9FAB21738 for ; Wed, 27 Mar 2019 18:03:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553709838; bh=Ffqck2aIWABNUq3ZwltuooVhhQ3A2FFCOQHwiHl4c8U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IVpuc/AWK2Yx4cDSEtva3peC02JuZoydSZ7TuelirDaXFaHsFL3Xr/9C+IEJf1/i2 c6TkjTEKmdAufCWnE7/36F9Y14hpw7oq/A/IV3NSkyfKzPsQLphm9xxUloJKlQmTCH +MP+4e5PXWMeFAA1gGJJkSmHfgsbbtc1R/q/y7Qk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733057AbfC0SD5 (ORCPT ); Wed, 27 Mar 2019 14:03:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:44278 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732879AbfC0SDx (ORCPT ); Wed, 27 Mar 2019 14:03:53 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 29310217D7; Wed, 27 Mar 2019 18:03:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553709832; bh=Ffqck2aIWABNUq3ZwltuooVhhQ3A2FFCOQHwiHl4c8U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jy6Fl+hp/xthAo710DUyJhO5Rvu8qul/7hFcw5HeRxAGQJ7qWVbuFH1hv37pNYwCp U9lc9rFbrK9DTNBFtZSsRGCte7SJuDOn05dCfwqip+VAIfaThrzo9CItLg+Oe6IMzx oGTvfNVfxoooUHkUwDcJYXIYGvVySTzklodpnePA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wen Yang , Felix Fietkau , Lorenzo Bianconi , Kalle Valo , "David S. Miller" , Matthias Brugger , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Sasha Levin Subject: [PATCH AUTOSEL 5.0 064/262] mt76: fix a leaked reference by adding a missing of_node_put Date: Wed, 27 Mar 2019 13:58:39 -0400 Message-Id: <20190327180158.10245-64-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190327180158.10245-1-sashal@kernel.org> References: <20190327180158.10245-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wen Yang [ Upstream commit 34e022d8b780a03902d82fb3997ba7c7b1f40c81 ] The call to of_find_node_by_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/wireless/mediatek/mt76/eeprom.c:58:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:61:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:67:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:70:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. ./drivers/net/wireless/mediatek/mt76/eeprom.c:72:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function. Signed-off-by: Wen Yang Cc: Felix Fietkau Cc: Lorenzo Bianconi Cc: Kalle Valo Cc: "David S. Miller" Cc: Matthias Brugger Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/eeprom.c | 24 ++++++++++++++------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c index 530e5593765c..a1529920d877 100644 --- a/drivers/net/wireless/mediatek/mt76/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -54,22 +54,30 @@ mt76_get_of_eeprom(struct mt76_dev *dev, int len) part = np->name; mtd = get_mtd_device_nm(part); - if (IS_ERR(mtd)) - return PTR_ERR(mtd); + if (IS_ERR(mtd)) { + ret = PTR_ERR(mtd); + goto out_put_node; + } - if (size <= sizeof(*list)) - return -EINVAL; + if (size <= sizeof(*list)) { + ret = -EINVAL; + goto out_put_node; + } offset = be32_to_cpup(list); ret = mtd_read(mtd, offset, len, &retlen, dev->eeprom.data); put_mtd_device(mtd); if (ret) - return ret; + goto out_put_node; - if (retlen < len) - return -EINVAL; + if (retlen < len) { + ret = -EINVAL; + goto out_put_node; + } - return 0; +out_put_node: + of_node_put(np); + return ret; #else return -ENOENT; #endif -- 2.19.1