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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 CFAD5C433E8 for ; Thu, 25 Mar 2021 11:34:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A836B601FF for ; Thu, 25 Mar 2021 11:34:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231935AbhCYLek (ORCPT ); Thu, 25 Mar 2021 07:34:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:42154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232048AbhCYLcl (ORCPT ); Thu, 25 Mar 2021 07:32:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DD27D61A79; Thu, 25 Mar 2021 11:28:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616671703; bh=ybqxxnJah7aSnGrEgGUrTjVsyygme31WX502oHksjC4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DPB+wpYILkkxMps9/ji/3aHWdh4QJzsJ9T4PZzIfxeS31gHPTg/WxV0ObMGVCC8Ev xF1L77CQYGKcdZD2/QYxiJ51bwp+7xtbHcdESQtsAbfomSgi3gIVGLkOjS0g3NuZ2l i9XnQH+q9fc6UVVYutFLx+PFgYXdizKhLldFNeM8o9OUIrjN5t8/FEaN8xfUqn2C1m 52A7470bkApm7uSWYu5LpMFlUAOBaz6smvf370mlGDa1LsF1kmcjmsiovZUT+2sn+s iuCjgbCvA8dwCWU3RX4ysVWvCVR45z9u1FlBHoJroLafWRxjNRjntOG05OSCctJliE V8sxXF0s12axw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Laurent Vivier , "Michael S . Tsirkin" , Sasha Levin , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 07/13] vhost: Fix vhost_vq_reset() Date: Thu, 25 Mar 2021 07:28:07 -0400 Message-Id: <20210325112814.1928637-7-sashal@kernel.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210325112814.1928637-1-sashal@kernel.org> References: <20210325112814.1928637-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Laurent Vivier [ Upstream commit beb691e69f4dec7bfe8b81b509848acfd1f0dbf9 ] vhost_reset_is_le() is vhost_init_is_le(), and in the case of cross-endian legacy, vhost_init_is_le() depends on vq->user_be. vq->user_be is set by vhost_disable_cross_endian(). But in vhost_vq_reset(), we have: vhost_reset_is_le(vq); vhost_disable_cross_endian(vq); And so user_be is used before being set. To fix that, reverse the lines order as there is no other dependency between them. Signed-off-by: Laurent Vivier Link: https://lore.kernel.org/r/20210312140913.788592-1-lvivier@redhat.com Signed-off-by: Michael S. Tsirkin Signed-off-by: Sasha Levin --- drivers/vhost/vhost.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index b14e62f11075..d2431afeda84 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -306,8 +306,8 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->call_ctx = NULL; vq->call = NULL; vq->log_ctx = NULL; - vhost_reset_is_le(vq); vhost_disable_cross_endian(vq); + vhost_reset_is_le(vq); vq->busyloop_timeout = 0; vq->umem = NULL; vq->iotlb = NULL; -- 2.30.1