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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 8ED28C282CE for ; Mon, 11 Feb 2019 15:53:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E7E221855 for ; Mon, 11 Feb 2019 15:53:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549900420; bh=E8xfGsJuPtt/9/J/WgB9uCyaXhkDXxHGjH8F0jV3js4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=STzXs1VcjRxjxqGxQleZ22f+v9igNc7ubibrx8i4OnShoGeF0eJW6JOF1yhbeUMSA ZfyIuowdEt41u4q36N7f/dZrSd/TJ04FGbM/H0CY4NZK6T+XPvaZMboJB1lgh7ByBH EzmjgYRBoB7EjdrgZX7aHZq9UqPh2uzeFaFYF5nc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731287AbfBKPxa (ORCPT ); Mon, 11 Feb 2019 10:53:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:45566 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731249AbfBKOg2 (ORCPT ); Mon, 11 Feb 2019 09:36:28 -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 1FD4E2080F; Mon, 11 Feb 2019 14:36:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549895787; bh=E8xfGsJuPtt/9/J/WgB9uCyaXhkDXxHGjH8F0jV3js4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hDWZ3Z3Zqk3M/ZURUlzGXpKWXLhvycK6QX7Y/SjcbRWAcpAZEPDmfgZoRTlKVhWOq Ybaah4Rku8oYg2Gloi7IEazIARNamFLzPTv/xXahbmc4AGtVdUXXAwAj7VmRDm1r8W N/Jn0RkVLFa3uJkBAu/E0MCMClkBbdZltbbLGlqo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andreas Steinmetz , Miklos Szeredi Subject: [PATCH 4.20 323/352] cuse: fix ioctl Date: Mon, 11 Feb 2019 15:19:10 +0100 Message-Id: <20190211141907.390871565@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190211141846.543045703@linuxfoundation.org> References: <20190211141846.543045703@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miklos Szeredi commit 8a3177db59cd644fde05ba9efee29392dfdec8aa upstream. cuse_process_init_reply() doesn't initialize fc->max_pages and thus all cuse bases ioctls fail with ENOMEM. Reported-by: Andreas Steinmetz Fixes: 5da784cce430 ("fuse: add max_pages to init_out") Cc: # v4.20 Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/fuse/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -628,6 +628,7 @@ void fuse_conn_init(struct fuse_conn *fc get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key)); fc->pid_ns = get_pid_ns(task_active_pid_ns(current)); fc->user_ns = get_user_ns(user_ns); + fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; } EXPORT_SYMBOL_GPL(fuse_conn_init); @@ -1162,7 +1163,6 @@ static int fuse_fill_super(struct super_ fc->user_id = d.user_id; fc->group_id = d.group_id; fc->max_read = max_t(unsigned, 4096, d.max_read); - fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; /* Used by get_root_inode() */ sb->s_fs_info = fc;