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 CC1D0C54EBE for ; Mon, 16 Jan 2023 17:05:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234125AbjAPRFm (ORCPT ); Mon, 16 Jan 2023 12:05:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232582AbjAPRFX (ORCPT ); Mon, 16 Jan 2023 12:05:23 -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 1989838EAC for ; Mon, 16 Jan 2023 08:46:56 -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 B6721B8105D for ; Mon, 16 Jan 2023 16:46:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1AC38C433D2; Mon, 16 Jan 2023 16:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887613; bh=tzSOTSA0HP8n3RgsL4EscEvLzrTLGfxDw45WANuCjio=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tbxiieLhEoVSBnwjmdR74dFFdbPH5dYAppuoG72jeYul+TUYK/mtIBNtxzqczS/Ja l10W0biL7VJfiFbYGZ8A9jYxJpJu+CEsSKKn81rpEArdWk3eksUEMAF7RDE0LVtYik ENL0OIxQ5Yd4RgDcBeGxcckCP+qH6hBnw2AfaIvo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.19 198/521] scsi: fcoe: Fix possible name leak when device_register() fails Date: Mon, 16 Jan 2023 16:47:40 +0100 Message-Id: <20230116154855.948911788@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 47b6a122c7b69a876c7ee2fc064a26b09627de9d ] If device_register() returns an error, the name allocated by dev_set_name() needs to be freed. As the comment of device_register() says, one should use put_device() to give up the reference in the error path. Fix this by calling put_device(), then the name can be freed in kobject_cleanup(). The 'fcf' is freed in fcoe_fcf_device_release(), so the kfree() in the error path can be removed. The 'ctlr' is freed in fcoe_ctlr_device_release(), so don't use the error label, just return NULL after calling put_device(). Fixes: 9a74e884ee71 ("[SCSI] libfcoe: Add fcoe_sysfs") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20221112094310.3633291-1-yangyingliang@huawei.com Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/fcoe/fcoe_sysfs.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c index 5c8310bade61..dab025e3ed27 100644 --- a/drivers/scsi/fcoe/fcoe_sysfs.c +++ b/drivers/scsi/fcoe/fcoe_sysfs.c @@ -831,14 +831,15 @@ struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent, dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id); error = device_register(&ctlr->dev); - if (error) - goto out_del_q2; + if (error) { + destroy_workqueue(ctlr->devloss_work_q); + destroy_workqueue(ctlr->work_q); + put_device(&ctlr->dev); + return NULL; + } return ctlr; -out_del_q2: - destroy_workqueue(ctlr->devloss_work_q); - ctlr->devloss_work_q = NULL; out_del_q: destroy_workqueue(ctlr->work_q); ctlr->work_q = NULL; @@ -1037,16 +1038,16 @@ struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr, fcf->selected = new_fcf->selected; error = device_register(&fcf->dev); - if (error) - goto out_del; + if (error) { + put_device(&fcf->dev); + goto out; + } fcf->state = FCOE_FCF_STATE_CONNECTED; list_add_tail(&fcf->peers, &ctlr->fcfs); return fcf; -out_del: - kfree(fcf); out: return NULL; } -- 2.35.1