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=-7.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 17B6DC43441 for ; Mon, 19 Nov 2018 16:33:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D607420870 for ; Mon, 19 Nov 2018 16:33:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="c/8OC1Nd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D607420870 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731226AbeKTC6A (ORCPT ); Mon, 19 Nov 2018 21:58:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:56872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730122AbeKTC57 (ORCPT ); Mon, 19 Nov 2018 21:57:59 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 537352086A; Mon, 19 Nov 2018 16:33:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542645231; bh=YFNXikzqD/rmKLDlYTIAt8DFP6cckuzT6Db6qHwZbeo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c/8OC1NdGY5Jft5WwU+h2h0mokYBtUJm4/d3b6243LDvBsuUMZda1zo8Z0Oq6ckxB Ec8nQ2CdUwuuc+Q5G3uXhRVGJC7G71BPMKG1DW6EBwot2ldpoF03SdOrxEI8UkrctE I5tQK0gTiAjZwpSPJcJqaFiIYVA/viLWuSlSfVqY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Yan, Zheng" , Ilya Dryomov Subject: [PATCH 4.19 086/205] Revert "ceph: fix dentry leak in splice_dentry()" Date: Mon, 19 Nov 2018 17:26:33 +0100 Message-Id: <20181119162631.564218605@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181119162616.586062722@linuxfoundation.org> References: <20181119162616.586062722@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review 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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yan, Zheng commit efe328230dc01aa0b1269aad0b5fae73eea4677a upstream. This reverts commit 8b8f53af1ed9df88a4c0fbfdf3db58f62060edf3. splice_dentry() is used by three places. For two places, req->r_dentry is passed to splice_dentry(). In the case of error, req->r_dentry does not get updated. So splice_dentry() should not drop reference. Cc: stable@vger.kernel.org # 4.18+ Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov Signed-off-by: Greg Kroah-Hartman --- fs/ceph/inode.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1132,8 +1132,12 @@ static struct dentry *splice_dentry(stru if (IS_ERR(realdn)) { pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", PTR_ERR(realdn), dn, in, ceph_vinop(in)); - dput(dn); - dn = realdn; /* note realdn contains the error */ + dn = realdn; + /* + * Caller should release 'dn' in the case of error. + * If 'req->r_dentry' is passed to this function, + * caller should leave 'req->r_dentry' untouched. + */ goto out; } else if (realdn) { dout("dn %p (%d) spliced with %p (%d) "