From patchwork Mon Jan 18 11:35:01 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: 366918 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,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 8EA56C433E6 for ; Mon, 18 Jan 2021 12:26:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4544922286 for ; Mon, 18 Jan 2021 12:26:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390769AbhARM0d (ORCPT ); Mon, 18 Jan 2021 07:26:33 -0500 Received: from mail.kernel.org ([198.145.29.99]:39118 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390760AbhARLps (ORCPT ); Mon, 18 Jan 2021 06:45:48 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9665D22D6D; Mon, 18 Jan 2021 11:45:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610970312; bh=COXDG+oE+rl5dUnnvqwdIPGPaZUIGMomsyAMLsSDo6c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f+pLBvKUZWA0R7z5KylIqZv4grCogHCHagsHoGst9obkiwUjBcwWQXmfdobukSlfO ay8jMbRaElUHPasSNpzw/jqVbAD+YD50a1c3e2d1jv1IG9/xn6KxgEprmeh+uYUl9D naGZfXIwJa/K5b6U8zE4UDWWHu10C+12zE2SYzsY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Trond Myklebust Subject: [PATCH 5.10 126/152] NFS/pNFS: Dont call pnfs_free_bucket_lseg() before removing the request Date: Mon, 18 Jan 2021 12:35:01 +0100 Message-Id: <20210118113358.765493266@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210118113352.764293297@linuxfoundation.org> References: <20210118113352.764293297@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Trond Myklebust commit 1757655d780d9d29bc4b60e708342e94924f7ef3 upstream. In pnfs_generic_clear_request_commit(), we try calling pnfs_free_bucket_lseg() before we remove the request from the DS bucket. That will always fail, since the point is to test for whether or not that bucket is empty. Fixes: c84bea59449a ("NFS/pNFS: Simplify bucket layout segment reference counting") Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/pnfs_nfs.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) --- a/fs/nfs/pnfs_nfs.c +++ b/fs/nfs/pnfs_nfs.c @@ -78,22 +78,18 @@ void pnfs_generic_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) { - struct pnfs_layout_segment *freeme = NULL; + struct pnfs_commit_bucket *bucket = NULL; if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) goto out; cinfo->ds->nwritten--; - if (list_is_singular(&req->wb_list)) { - struct pnfs_commit_bucket *bucket; - + if (list_is_singular(&req->wb_list)) bucket = list_first_entry(&req->wb_list, - struct pnfs_commit_bucket, - written); - freeme = pnfs_free_bucket_lseg(bucket); - } + struct pnfs_commit_bucket, written); out: nfs_request_remove_commit_list(req, cinfo); - pnfs_put_lseg(freeme); + if (bucket) + pnfs_put_lseg(pnfs_free_bucket_lseg(bucket)); } EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);