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=-19.1 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=unavailable 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 217C2C28CA9 for ; Thu, 16 Sep 2021 17:41:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE1786044F for ; Thu, 16 Sep 2021 17:41:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349183AbhIPRml (ORCPT ); Thu, 16 Sep 2021 13:42:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:53752 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344611AbhIPRf5 (ORCPT ); Thu, 16 Sep 2021 13:35:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1BBE761875; Thu, 16 Sep 2021 16:49:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631810951; bh=6LOksXce/k5HvDLNXSjLG9Te585jaGoi0SD0jX9pYW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OJE49u289G3j+DMIvzNpMK4VRW7gD1OI0Y+lB+LePime2cY2ZlkBFK0ciQQ69kUNE 3UWfOpG58FgKnr9zBUvxgYn5Hgmk1wlP3MgvCBb1HmJsT9C3uA/LxbtnmperpbKaKz f8Nqw63FMxvuiid1SLPUJkffVBTv7WRll7t0sV4c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daire Byrne , "J. Bruce Fields" , Chuck Lever , Sasha Levin Subject: [PATCH 5.14 328/432] lockd: lockd server-side shouldnt set fl_ops Date: Thu, 16 Sep 2021 18:01:17 +0200 Message-Id: <20210916155821.960706094@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916155810.813340753@linuxfoundation.org> References: <20210916155810.813340753@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: J. Bruce Fields [ Upstream commit 7de875b231edb807387a81cde288aa9e1015ef9e ] Locks have two sets of op arrays, fl_lmops for the lock manager (lockd or nfsd), fl_ops for the filesystem. The server-side lockd code has been setting its own fl_ops, which leads to confusion (and crashes) in the reexport case, where the filesystem expects to be the only one setting fl_ops. And there's no reason for it that I can see-the lm_get/put_owner ops do the same job. Reported-by: Daire Byrne Tested-by: Daire Byrne Signed-off-by: J. Bruce Fields Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/lockd/svclock.c | 30 ++++++++++++------------------ 1 file changed, 12 insertions(+), 18 deletions(-) diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 498cb70c2c0d..273a81971ed5 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -395,28 +395,10 @@ nlmsvc_release_lockowner(struct nlm_lock *lock) nlmsvc_put_lockowner(lock->fl.fl_owner); } -static void nlmsvc_locks_copy_lock(struct file_lock *new, struct file_lock *fl) -{ - struct nlm_lockowner *nlm_lo = (struct nlm_lockowner *)fl->fl_owner; - new->fl_owner = nlmsvc_get_lockowner(nlm_lo); -} - -static void nlmsvc_locks_release_private(struct file_lock *fl) -{ - nlmsvc_put_lockowner((struct nlm_lockowner *)fl->fl_owner); -} - -static const struct file_lock_operations nlmsvc_lock_ops = { - .fl_copy_lock = nlmsvc_locks_copy_lock, - .fl_release_private = nlmsvc_locks_release_private, -}; - void nlmsvc_locks_init_private(struct file_lock *fl, struct nlm_host *host, pid_t pid) { fl->fl_owner = nlmsvc_find_lockowner(host, pid); - if (fl->fl_owner != NULL) - fl->fl_ops = &nlmsvc_lock_ops; } /* @@ -788,9 +770,21 @@ nlmsvc_notify_blocked(struct file_lock *fl) printk(KERN_WARNING "lockd: notification for unknown block!\n"); } +static fl_owner_t nlmsvc_get_owner(fl_owner_t owner) +{ + return nlmsvc_get_lockowner(owner); +} + +static void nlmsvc_put_owner(fl_owner_t owner) +{ + nlmsvc_put_lockowner(owner); +} + const struct lock_manager_operations nlmsvc_lock_operations = { .lm_notify = nlmsvc_notify_blocked, .lm_grant = nlmsvc_grant_deferred, + .lm_get_owner = nlmsvc_get_owner, + .lm_put_owner = nlmsvc_put_owner, }; /* -- 2.30.2