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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACB5CC54EBE for ; Mon, 16 Jan 2023 17:04:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229724AbjAPREy (ORCPT ); Mon, 16 Jan 2023 12:04:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232648AbjAPREN (ORCPT ); Mon, 16 Jan 2023 12:04:13 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FEE11E2BA for ; Mon, 16 Jan 2023 08:46:34 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A6309B8108E for ; Mon, 16 Jan 2023 16:46:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A2C9C433F0; Mon, 16 Jan 2023 16:46:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887592; bh=ncA++PhVmVvgfwpBhLeg+GMwR/sWPznU9XmfMY+1/pE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HWP7R4TsE8Os8ay0RaDso/wqCSha9aGKgjw2p+fztrCS5YD02g7RJ29uYMAHK40eJ VTZulJPZh+bufs08j9o1P/bgScNj4HlKiasnoAxiDzvuAUJxhrROWplPR7PvoNLE2z UXDhYes40rbz2NRhZKWgyJVPzsIBqHck11IVGUjM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Sasha Levin Subject: [PATCH 4.19 208/521] drivers: dio: fix possible memory leak in dio_init() Date: Mon, 16 Jan 2023 16:47:50 +0100 Message-Id: <20230116154856.454122423@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yang Yingliang [ Upstream commit e63e99397b2613d50a5f4f02ed07307e67a190f1 ] If device_register() returns error, the 'dev' and name needs be freed. Add a release function, and then call put_device() in the error path, so the name is freed in kobject_cleanup() and to the 'dev' is freed in release function. Fixes: 2e4c77bea3d8 ("m68k: dio - Kill warn_unused_result warnings") Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20221109064036.1835346-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/dio/dio.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c index 92e78d16b476..fcde602f4902 100644 --- a/drivers/dio/dio.c +++ b/drivers/dio/dio.c @@ -110,6 +110,12 @@ static char dio_no_name[] = { 0 }; #endif /* CONFIG_DIO_CONSTANTS */ +static void dio_dev_release(struct device *dev) +{ + struct dio_dev *ddev = container_of(dev, typeof(struct dio_dev), dev); + kfree(ddev); +} + int __init dio_find(int deviceid) { /* Called to find a DIO device before the full bus scan has run. @@ -222,6 +228,7 @@ static int __init dio_init(void) dev->bus = &dio_bus; dev->dev.parent = &dio_bus.dev; dev->dev.bus = &dio_bus_type; + dev->dev.release = dio_dev_release; dev->scode = scode; dev->resource.start = pa; dev->resource.end = pa + DIO_SIZE(scode, va); @@ -249,6 +256,7 @@ static int __init dio_init(void) if (error) { pr_err("DIO: Error registering device %s\n", dev->name); + put_device(&dev->dev); continue; } error = dio_create_sysfs_dev_files(dev); -- 2.35.1