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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 D60C4C10F0C for ; Thu, 4 Apr 2019 09:42:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A822720855 for ; Thu, 4 Apr 2019 09:42:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554370976; bh=jNTb3dUjH/H2hvsA5PLRckeSce98Sa3onMsch0ZvF9o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=i3a2Do1K4L0Soa6lT48hkhglekrTd0zZmuUR+jvcUx73rjkm6dclMFsRJAa/nucP7 ikqMmlS7XoE0jspHRf/xAq7SsDAA/K73BfFvSsyt6Q63e7mPcMs5yQwaUtC/004Wvg YtKlgJrXu7PhSD3jeeQjCf1YxHClOG/71MdMLbbA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731351AbfDDJBG (ORCPT ); Thu, 4 Apr 2019 05:01:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:38056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730446AbfDDJBF (ORCPT ); Thu, 4 Apr 2019 05:01:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AF01F21741; Thu, 4 Apr 2019 09:01:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554368464; bh=jNTb3dUjH/H2hvsA5PLRckeSce98Sa3onMsch0ZvF9o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2ShqQo0YJQ2UkNwYDBKzEmu5uic/ucVk9H5rJlbwe9UnrRlks31z2qcDyODO1OfnS OHlGQ3SEDAjLmXl2rCiMyYvvW6nz8KrqkC2UJiJFm9nsdznT7Oselh/LBs2GCE2ekC NytE9IYYagDVxKZHvPH/A4yTDRwu2F2HtlICCU8g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, 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 4.19 049/187] mt76: fix a leaked reference by adding a missing of_node_put Date: Thu, 4 Apr 2019 10:46:26 +0200 Message-Id: <20190404084605.380921548@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190404084603.119654039@linuxfoundation.org> References: <20190404084603.119654039@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ 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