From patchwork Tue Nov 6 09:30:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirill Tkhai X-Patchwork-Id: 10669961 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 89C9013A4 for ; Tue, 6 Nov 2018 09:30:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 762002A27C for ; Tue, 6 Nov 2018 09:30:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 67CB82A28F; Tue, 6 Nov 2018 09:30:59 +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 EB34B2A27C for ; Tue, 6 Nov 2018 09:30:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730352AbeKFSzM (ORCPT ); Tue, 6 Nov 2018 13:55:12 -0500 Received: from relay.sw.ru ([185.231.240.75]:59168 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729430AbeKFSzL (ORCPT ); Tue, 6 Nov 2018 13:55:11 -0500 Received: from [172.16.25.169] (helo=localhost.localdomain) by relay.sw.ru with esmtp (Exim 4.90_1) (envelope-from ) id 1gJxhC-0002w3-9j; Tue, 06 Nov 2018 12:30:50 +0300 Subject: [PATCH 4/6] fuse: Check for FR_SENT bit in fuse_dev_do_write() From: Kirill Tkhai To: miklos@szeredi.hu, ktkhai@virtuozzo.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 06 Nov 2018 12:30:49 +0300 Message-ID: <154149664975.17764.16537105755726576371.stgit@localhost.localdomain> In-Reply-To: <154149586524.17764.5252013294539109287.stgit@localhost.localdomain> References: <154149586524.17764.5252013294539109287.stgit@localhost.localdomain> User-Agent: StGit/0.18 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 It's not possible to have answer to a request, before the request is actually sent. Add sanity check for that. Signed-off-by: Kirill Tkhai --- fs/fuse/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 739968ee8b0c..c603f1ebf0fd 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1947,7 +1947,7 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud, goto err_unlock_pq; req = request_find(fpq, oh.unique & ~FUSE_INT_REQ_BIT); - if (!req) + if (!req || !test_bit(FR_SENT, &req->flags)) goto err_unlock_pq; /* Is it an interrupt reply ID? */