From patchwork Wed Nov 16 15:17:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13045377 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 62A6CC43219 for ; Wed, 16 Nov 2022 15:17:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233664AbiKPPRi (ORCPT ); Wed, 16 Nov 2022 10:17:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233340AbiKPPRe (ORCPT ); Wed, 16 Nov 2022 10:17:34 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D86A2B625; Wed, 16 Nov 2022 07:17:33 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2863B61E83; Wed, 16 Nov 2022 15:17:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE7B9C433C1; Wed, 16 Nov 2022 15:17:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668611852; bh=yV8M/3emkfa0v+JOTDZ4rZGKsnEb+eyCdX2b35M2HGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GFSJEruBqD3UjsUIscezAfqvMdcvsa4Sl5KLDACMuWA/jiXclACdRl7MAwGXNgfCX ZRZ3RXGnFqrqcsUWVXmTwi8+XiN3bEZA/bs64yZMZNY3WQ/h9M9CMe8wo6RbhaCFRJ D5SxE48RrgWvuHOJjKziqn/gyrMvHtM6hWzKxCxHByE/IfL+UhHfgtbqp510ks4yRN be/726mUIC3CgM0V0qVa1TxdCFXaDVm/PrazWp6q2Bhy2S079bngjE8w5TWKL5FlhI BxVj0krDMw8KFxT4xtaDEdV5fTVfaMIf3KT/eFx33rCi/AtT6jZGMGDHsnd4d9ziZZ VclL82dby9UUA== From: Jeff Layton To: linux-fsdevel@vger.kernel.org Cc: linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org, chuck.lever@oracle.com, viro@zeniv.linux.org.uk, hch@lst.de, Steve French Subject: [PATCH 3/7] cifs: use locks_inode_context helper Date: Wed, 16 Nov 2022 10:17:22 -0500 Message-Id: <20221116151726.129217-4-jlayton@kernel.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221116151726.129217-1-jlayton@kernel.org> References: <20221116151726.129217-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org cifs currently doesn't access i_flctx safely. This requires a smp_load_acquire, as the pointer is set via cmpxchg (a release operation). Cc: Steve French Signed-off-by: Jeff Layton Reviewed-by: Christoph Hellwig --- fs/cifs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index cd9698209930..6c1431979495 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1413,7 +1413,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) struct inode *inode = d_inode(cfile->dentry); struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct file_lock *flock; - struct file_lock_context *flctx = inode->i_flctx; + struct file_lock_context *flctx = locks_inode_context(inode); unsigned int count = 0, i; int rc = 0, xid, type; struct list_head locks_to_send, *el;