From patchwork Mon Mar 1 16:10:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 389234 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 E6610C433E6 for ; Mon, 1 Mar 2021 20:09:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE05164E6C for ; Mon, 1 Mar 2021 20:09:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242898AbhCAUIb (ORCPT ); Mon, 1 Mar 2021 15:08:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:60294 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236135AbhCATyx (ORCPT ); Mon, 1 Mar 2021 14:54:53 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1990D65375; Mon, 1 Mar 2021 17:55:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614621310; bh=ipJitBnMYdYY+WlDnA3EGteWFk19BPIdBbZSwH0ah+I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BCBgS/7q1pJiFKjrX77Xtw/X0JDnmEiAvOqTFzlWtSfvmV8SLSjWnEHnS+cZddzi/ axdtEj579DC4LoxWdFJo5siJChHE1AAV8S1a6OaG+dLwTZkKyukkAOMlyHy/fDwl1w S1ta3MmYCUuQaMVwnGSbN5oakwkmHNU+gYXDi5AI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Gioh Kim , Jack Wang , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.11 462/775] RDMA/rtrs-srv-sysfs: fix missing put_device Date: Mon, 1 Mar 2021 17:10:30 +0100 Message-Id: <20210301161224.385008241@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Gioh Kim [ Upstream commit e2853c49477d104c01d3c7944e1fb5074eb11d9f ] put_device() decreases the ref-count and then the device will be cleaned-up, while at is also add missing put_device in rtrs_srv_create_once_sysfs_root_folders This patch solves a kmemleak error as below: unreferenced object 0xffff88809a7a0710 (size 8): comm "kworker/4:1H", pid 113, jiffies 4295833049 (age 6212.380s) hex dump (first 8 bytes): 62 6c 61 00 6b 6b 6b a5 bla.kkk. backtrace: [<0000000054413611>] kstrdup+0x2e/0x60 [<0000000078e3120a>] kobject_set_name_vargs+0x2f/0xb0 [<00000000f1a17a6b>] dev_set_name+0xab/0xe0 [<00000000d5502e32>] rtrs_srv_create_sess_files+0x2fb/0x314 [rtrs_server] [<00000000ed11a1ef>] rtrs_srv_info_req_done+0x631/0x800 [rtrs_server] [<000000008fc5aa8f>] __ib_process_cq+0x94/0x100 [ib_core] [<00000000a9599cb4>] ib_cq_poll_work+0x32/0xc0 [ib_core] [<00000000cfc376be>] process_one_work+0x4bc/0x980 [<0000000016e5c96a>] worker_thread+0x78/0x5c0 [<00000000c20b8be0>] kthread+0x191/0x1e0 [<000000006c9c0003>] ret_from_fork+0x3a/0x50 Fixes: baa5b28b7a47 ("RDMA/rtrs-srv: Replace device_register with device_initialize and device_add") Link: https://lore.kernel.org/r/20210212134525.103456-5-jinpu.wang@cloud.ionos.com Signed-off-by: Gioh Kim Signed-off-by: Jack Wang Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c index 94e3f3290500a..126a96e75c621 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c @@ -183,6 +183,7 @@ static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess) err = -ENOMEM; pr_err("kobject_create_and_add(): %d\n", err); device_del(&srv->dev); + put_device(&srv->dev); goto unlock; } dev_set_uevent_suppress(&srv->dev, false); @@ -208,6 +209,7 @@ rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess) kobject_put(srv->kobj_paths); mutex_unlock(&srv->paths_mutex); device_del(&srv->dev); + put_device(&srv->dev); } else { mutex_unlock(&srv->paths_mutex); }