From patchwork Tue Apr 26 08:20:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 566602 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 EFD44C433EF for ; Tue, 26 Apr 2022 08:49:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229742AbiDZIwA (ORCPT ); Tue, 26 Apr 2022 04:52:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346465AbiDZIuF (ORCPT ); Tue, 26 Apr 2022 04:50:05 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 59EA21399B9; Tue, 26 Apr 2022 01:38:16 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id 53B1CB81CF2; Tue, 26 Apr 2022 08:38:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B7EFC385A0; Tue, 26 Apr 2022 08:38:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650962294; bh=0AMYWBbfpUL//+F2tIsTAni2SaYlp5EIBR+OQERkZTc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m0Al9Dmb1JcxCykmVLVsXCNYi7uCNKeUObwyMSjH9ujvdsif5qDuXwGJtq55HaS39 o/lScZUQkamczqXCEnNYip1FS4Ram/YCRxMUentrLNzdJv2W5hxnzoUsC98XQox79D YXzfO2NhvuqsK+E4cbr0G5aXeZ0ZF4EhWJEX1DWY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bernice Zhang , Dave Jiang , Vinod Koul , Sasha Levin Subject: [PATCH 5.15 049/124] dmaengine: idxd: add RO check for wq max_transfer_size write Date: Tue, 26 Apr 2022 10:20:50 +0200 Message-Id: <20220426081748.695278023@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081747.286685339@linuxfoundation.org> References: <20220426081747.286685339@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dave Jiang [ Upstream commit 505a2d1032ae656b0a8c736be110255503941cde ] Block wq_max_transfer_size_store() when the device is configured as read-only and not configurable. Fixes: d7aad5550eca ("dmaengine: idxd: add support for configurable max wq xfer size") Reported-by: Bernice Zhang Tested-by: Bernice Zhang Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/164971488154.2200913.10706665404118545941.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/sysfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index f7ab5c077a2b..33d94c67fedb 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -842,6 +842,9 @@ static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attr u64 xfer_size; int rc; + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) + return -EPERM; + if (wq->state != IDXD_WQ_DISABLED) return -EPERM;