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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 0B1D3C2BA2B for ; Sat, 11 Apr 2020 12:11:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D608D2084D for ; Sat, 11 Apr 2020 12:11:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607077; bh=aDGK5rQcXBA9uGsDFP25cA3dCh5xzG68JG0usjQxYLY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Qk5Amrs0uXrn05KvJ/c1+HABbpqAGzi/DdtXwF0gSwIoYDUhLCpSrjB3I+mNdxArw XiAOYA1PRpBhDZlnd+ObWg90yxR1ie0Xbpe6Ehrn6vp1RwEjEVxLdCa5oKZpwnBB7u M+s93pxFGr7MSUoLmudmw9M27rryIxDOysGp5aAE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726901AbgDKMLP (ORCPT ); Sat, 11 Apr 2020 08:11:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:43098 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726872AbgDKMLM (ORCPT ); Sat, 11 Apr 2020 08:11:12 -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 823DE20787; Sat, 11 Apr 2020 12:11:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607071; bh=aDGK5rQcXBA9uGsDFP25cA3dCh5xzG68JG0usjQxYLY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dbJpzsDqQkUndtEcFHPJn+WL7Xp1QktLIebKKP2lxpMWEcieKTcODh3NEsVyaUOaq Swxuvh2TUzLU5vCER/FgX5EcZiG4oZJlAB3AFTTEYsReqDTsNuQYxJpQqUWfhd74zi CU32y+qjWhVylku97JA+H+x1I7P97O75MGy1NewE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Marciniszyn , Kaike Wan , Dennis Dalessandro , Jason Gunthorpe Subject: [PATCH 4.4 25/29] IB/hfi1: Call kobject_put() when kobject_init_and_add() fails Date: Sat, 11 Apr 2020 14:08:55 +0200 Message-Id: <20200411115412.036558577@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200411115407.651296755@linuxfoundation.org> References: <20200411115407.651296755@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kaike Wan commit dfb5394f804ed4fcea1fc925be275a38d66712ab upstream. When kobject_init_and_add() returns an error in the function hfi1_create_port_files(), the function kobject_put() is not called for the corresponding kobject, which potentially leads to memory leak. This patch fixes the issue by calling kobject_put() even if kobject_init_and_add() fails. Cc: Link: https://lore.kernel.org/r/20200326163813.21129.44280.stgit@awfm-01.aw.intel.com Reviewed-by: Mike Marciniszyn Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rdma/hfi1/sysfs.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) --- a/drivers/staging/rdma/hfi1/sysfs.c +++ b/drivers/staging/rdma/hfi1/sysfs.c @@ -620,7 +620,11 @@ int hfi1_create_port_files(struct ib_dev dd_dev_err(dd, "Skipping sc2vl sysfs info, (err %d) port %u\n", ret, port_num); - goto bail; + /* + * Based on the documentation for kobject_init_and_add(), the + * caller should call kobject_put even if this call fails. + */ + goto bail_sc2vl; } kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD); @@ -630,7 +634,7 @@ int hfi1_create_port_files(struct ib_dev dd_dev_err(dd, "Skipping sl2sc sysfs info, (err %d) port %u\n", ret, port_num); - goto bail_sc2vl; + goto bail_sl2sc; } kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD); @@ -640,7 +644,7 @@ int hfi1_create_port_files(struct ib_dev dd_dev_err(dd, "Skipping vl2mtu sysfs info, (err %d) port %u\n", ret, port_num); - goto bail_sl2sc; + goto bail_vl2mtu; } kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD); @@ -651,7 +655,7 @@ int hfi1_create_port_files(struct ib_dev dd_dev_err(dd, "Skipping Congestion Control sysfs info, (err %d) port %u\n", ret, port_num); - goto bail_vl2mtu; + goto bail_cc; } kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD); @@ -691,7 +695,6 @@ bail_sl2sc: kobject_put(&ppd->sl2sc_kobj); bail_sc2vl: kobject_put(&ppd->sc2vl_kobj); -bail: return ret; }