From patchwork Wed May 11 13:22:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Hai X-Patchwork-Id: 12846168 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 371A5C433EF for ; Wed, 11 May 2022 13:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243098AbiEKNE1 (ORCPT ); Wed, 11 May 2022 09:04:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243058AbiEKNEQ (ORCPT ); Wed, 11 May 2022 09:04:16 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8878233A6A; Wed, 11 May 2022 06:04:13 -0700 (PDT) Received: from kwepemi100014.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4Kyw3H1n2DzCsbX; Wed, 11 May 2022 20:59:23 +0800 (CST) Received: from kwepemm600001.china.huawei.com (7.193.23.3) by kwepemi100014.china.huawei.com (7.221.188.106) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 11 May 2022 21:04:10 +0800 Received: from huawei.com (10.175.113.133) by kwepemm600001.china.huawei.com (7.193.23.3) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 11 May 2022 21:04:09 +0800 From: Wang Hai To: , , , , , , CC: , , , Subject: [PATCH 3/3] SUNRPC: Fix local socket leak in xs_setup_local() Date: Wed, 11 May 2022 21:22:32 +0800 Message-ID: <20220511132232.4030-4-wanghai38@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220511132232.4030-1-wanghai38@huawei.com> References: <20220511132232.4030-1-wanghai38@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.113.133] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600001.china.huawei.com (7.193.23.3) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Add mechanism in xs_setup_local() to safely tear xprt down and solve the socket leak problem. Signed-off-by: Wang Hai --- net/sunrpc/xprtsock.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 25b8a8ead56b..7b9a62750571 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1264,6 +1264,18 @@ static void xs_xprt_free(struct rpc_xprt *xprt) xprt_free(xprt); } +/** + * xs_destroy_xprt - close xprt socket and destroy it. + */ +static void xs_destroy_xprt(struct work_struct *work) +{ + struct rpc_xprt *xprt = + container_of(work, struct rpc_xprt, task_cleanup); + + xs_close(xprt); + xs_xprt_free(xprt); +} + /** * xs_destroy - prepare to shutdown a transport * @xprt: doomed transport @@ -2891,7 +2903,9 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args) return xprt; ret = ERR_PTR(-EINVAL); out_err: - xs_xprt_free(xprt); + + INIT_WORK(&xprt->task_cleanup, xs_destroy_xprt); + schedule_work(&xprt->task_cleanup); return ret; }