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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 76AB0C43387 for ; Tue, 15 Jan 2019 16:41:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D4D12054F for ; Tue, 15 Jan 2019 16:41:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547570490; bh=x22OCmGHYKCXRpq0ZfjMFIcqprLfmwKC3GgywQMXNhY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=i9O8cWXRsUiIV1FOZcO/ifyV4Za6CO1iyBkNj8myOl2O13lwDe/hjT+piqQfh9x2B /mvpF6Mc0iGGn52V8DSFHeKH6+23ft5h7uvZBWsTjajhr+qkpVxtc+PdsVTOSOEvct Imhzb36XkpcX6pGFN5tm2x8Ds56gNKlPjTsjQCpk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732795AbfAOQl3 (ORCPT ); Tue, 15 Jan 2019 11:41:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:58054 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732760AbfAOQlU (ORCPT ); Tue, 15 Jan 2019 11:41:20 -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 329A92054F; Tue, 15 Jan 2019 16:41:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547570479; bh=x22OCmGHYKCXRpq0ZfjMFIcqprLfmwKC3GgywQMXNhY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MB7/R3mdouyzpsBtA1oD0ZgVmQQrxDMMq657dv19LC73X7lhYBb34j9EWE9sz8fYC Rumx3OBB0R9Nfm79yIV4ytyaFmJ1yV9Nuy8nBNGVcopnSsAbdXN9pr1HCZL/xb24TM OcPztfKdpKTgPVMDszbl1BGLZUpv9JBp5OuTvtpI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Shilovsky , Steve French Subject: [PATCH 4.19 10/50] CIFS: Do not set credits to 1 if the server didnt grant anything Date: Tue, 15 Jan 2019 17:35:46 +0100 Message-Id: <20190115154910.565903590@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190115154909.933241945@linuxfoundation.org> References: <20190115154909.933241945@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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pavel Shilovsky commit 33fa5c8b8a7dbe6353a56eaa654b790348890d42 upstream. Currently we reset the number of total credits granted by the server to 1 if the server didn't grant us anything int the response. This violates the SMB3 protocol - we need to trust the server and use the credit values from the response. Fix this by removing the corresponding code. Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French CC: Stable Signed-off-by: Greg Kroah-Hartman --- fs/cifs/transport.c | 2 -- 1 file changed, 2 deletions(-) --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -885,8 +885,6 @@ compound_send_recv(const unsigned int xi for (i = 0; i < num_rqst; i++) if (midQ[i]->resp_buf) credits += ses->server->ops->get_credits(midQ[i]); - if (!credits) - credits = 1; for (i = 0; i < num_rqst; i++) { if (rc < 0)