From patchwork Thu Jul 2 01:43:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 11637683 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D565492A for ; Thu, 2 Jul 2020 01:45:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA5A420672 for ; Thu, 2 Jul 2020 01:45:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="MVaCBzij" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728140AbgGBBp3 (ORCPT ); Wed, 1 Jul 2020 21:45:29 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:34922 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728131AbgGBBp3 (ORCPT ); Wed, 1 Jul 2020 21:45:29 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0621d0Ek155850; Thu, 2 Jul 2020 01:45:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=tE3kFlaOk7xz7kinaT/6Uao6WzALtlB8cSTjFtmf16M=; b=MVaCBzijXTqH6no+1xausGKUlF2NhcBh1UYdxf44E5uDfOjr4j4WN2s3wXacfmRtITEP p9vLzScePY24RxlGSieoRtFE0KyFG5aQe+XHRO8NXvVw2EyP4v9mUQOt9ePP+vQReh6Z e82tUIsto+S7vAYtY55QmTZu44pejzxOjCxdtyiQJBdC0J3HTsXODBf9+MycLeyTuVH+ m082RK6atuOgTiIBH76AZ1hF0z5MCmdkLmiCHfNgBwZJ881voqyyrUrvXOeFkS1YACxg goIizCI+oem7/1g4f8n76ZMJbAhDFn6OxKXqmGvAnt3LRJt7FiP+MpmhL+sBqQqCBzzl Rg== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 31xx1e2hy6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 02 Jul 2020 01:45:25 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0621glKO050688; Thu, 2 Jul 2020 01:43:25 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 31xg17stfb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Jul 2020 01:43:25 +0000 Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 0621hOlh022092; Thu, 2 Jul 2020 01:43:24 GMT Received: from ol2.localdomain (/73.88.28.6) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 02 Jul 2020 01:43:24 +0000 From: Mike Christie To: martin.petersen@oracle.com, bstroesser@ts.fujitsu.com, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org Subject: [PATCH 2/7] target: fix xcopy sess release leak Date: Wed, 1 Jul 2020 20:43:18 -0500 Message-Id: <1593654203-12442-3-git-send-email-michael.christie@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1593654203-12442-1-git-send-email-michael.christie@oracle.com> References: <1593654203-12442-1-git-send-email-michael.christie@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9669 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 malwarescore=0 mlxlogscore=999 suspectscore=2 bulkscore=0 mlxscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2007020010 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9669 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 clxscore=1015 adultscore=0 suspectscore=2 mlxlogscore=999 cotscore=-2147483648 lowpriorityscore=0 malwarescore=0 phishscore=0 impostorscore=0 mlxscore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2007020009 Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org transport_init_session can allocate memory via percpu_ref_init, and target_xcopy_release_pt never frees it. This adds a transport_uninit_session function to handle cleanup of resources allocated in the init function. Signed-off-by: Mike Christie --- drivers/target/target_core_internal.h | 1 + drivers/target/target_core_transport.c | 7 ++++++- drivers/target/target_core_xcopy.c | 11 +++++++++-- 3 files changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 8533444..e7b3c6e 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -138,6 +138,7 @@ struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *tpg, void release_se_kmem_caches(void); u32 scsi_get_new_index(scsi_index_t); void transport_subsystem_check_init(void); +void transport_uninit_session(struct se_session *); unsigned char *transport_dump_cmd_direction(struct se_cmd *); void transport_dump_dev_state(struct se_device *, char *, int *); void transport_dump_dev_info(struct se_device *, struct se_lun *, diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 90ecdd7..e6e1fa6 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -236,6 +236,11 @@ int transport_init_session(struct se_session *se_sess) } EXPORT_SYMBOL(transport_init_session); +void transport_uninit_session(struct se_session *se_sess) +{ + percpu_ref_exit(&se_sess->cmd_count); +} + /** * transport_alloc_session - allocate a session object and initialize it * @sup_prot_ops: bitmask that defines which T10-PI modes are supported. @@ -579,7 +584,7 @@ void transport_free_session(struct se_session *se_sess) sbitmap_queue_free(&se_sess->sess_tag_pool); kvfree(se_sess->sess_cmd_map); } - percpu_ref_exit(&se_sess->cmd_count); + transport_uninit_session(se_sess); kmem_cache_free(se_sess_cache, se_sess); } EXPORT_SYMBOL(transport_free_session); diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c index 0d00ccb..44e15d7 100644 --- a/drivers/target/target_core_xcopy.c +++ b/drivers/target/target_core_xcopy.c @@ -474,7 +474,7 @@ int target_xcopy_setup_pt(void) memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); ret = transport_init_session(&xcopy_pt_sess); if (ret < 0) - return ret; + goto destroy_wq; xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; @@ -483,12 +483,19 @@ int target_xcopy_setup_pt(void) xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; return 0; + +destroy_wq: + destroy_workqueue(xcopy_wq); + xcopy_wq = NULL; + return ret; } void target_xcopy_release_pt(void) { - if (xcopy_wq) + if (xcopy_wq) { destroy_workqueue(xcopy_wq); + transport_uninit_session(&xcopy_pt_sess); + } } /*