From patchwork Tue Oct 23 22:43:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 10653859 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9E80613A4 for ; Tue, 23 Oct 2018 22:45:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89FAC29FA5 for ; Tue, 23 Oct 2018 22:45:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E54329FBD; Tue, 23 Oct 2018 22:45:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 266B529FA5 for ; Tue, 23 Oct 2018 22:45:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728830AbeJXHLW (ORCPT ); Wed, 24 Oct 2018 03:11:22 -0400 Received: from mx2.suse.de ([195.135.220.15]:36334 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725787AbeJXHLV (ORCPT ); Wed, 24 Oct 2018 03:11:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A3D75AEAD; Tue, 23 Oct 2018 22:45:55 +0000 (UTC) From: NeilBrown To: Jeff Layton , Alexander Viro Date: Wed, 24 Oct 2018 09:43:54 +1100 Subject: [PATCH 3/9] NFS: use locks_copy_lock() to copy locks. Cc: "J. Bruce Fields" , Martin Wilck , linux-fsdevel@vger.kernel.org, Frank Filz , linux-kernel@vger.kernel.org Message-ID: <154033463444.29542.13558945918454678800.stgit@noble> In-Reply-To: <154033435272.29542.13985568983074440924.stgit@noble> References: <154033435272.29542.13985568983074440924.stgit@noble> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Using memcpy() to copy lock requests leave the various list_head in an inconsistent state. As we will soon attach a list of conflicting request to another pending request, we need these lists to be consistent. So change NFS to use locks_init_lock/locks_copy_lock instead of memcpy. Signed-off-by: NeilBrown --- fs/nfs/nfs4proc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 8220a168282e..cd5a431c6583 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -6284,7 +6284,8 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, /* Ensure we don't close file until we're done freeing locks! */ p->ctx = get_nfs_open_context(ctx); p->l_ctx = nfs_get_lock_context(ctx); - memcpy(&p->fl, fl, sizeof(p->fl)); + locks_init_lock(&p->fl); + locks_copy_lock(&p->fl, fl); p->server = NFS_SERVER(inode); return p; } @@ -6506,7 +6507,8 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, p->server = server; refcount_inc(&lsp->ls_count); p->ctx = get_nfs_open_context(ctx); - memcpy(&p->fl, fl, sizeof(p->fl)); + locks_init_lock(&p->fl); + locks_copy_lock(&p->fl, fl); return p; out_free_seqid: nfs_free_seqid(p->arg.open_seqid);