From patchwork Fri Mar 12 14:09:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 12134713 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=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 5F2EBC4332B for ; Fri, 12 Mar 2021 14:10:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3B63464FDD for ; Fri, 12 Mar 2021 14:10:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231865AbhCLOJw (ORCPT ); Fri, 12 Mar 2021 09:09:52 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:60346 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231781AbhCLOJY (ORCPT ); Fri, 12 Mar 2021 09:09:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615558164; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=sQYoIfj5WQ3gNxzaMGVHtAJ8toU1d/6LwVnCduC2jYw=; b=IhmfNMZcSsb9g2B4uedENSRp0A7SHol/bhmJgEC69s0yIZcm8Ey+3L8BMvvueAyo/yM+5c gHQ0igu7NFgiVIlJwz2m9EGTcnIk4BSMtRaDg/JFi0vTidxBOS1+V3lIYlxTbu/5pMmVxJ JvN1IADDOCHNaghyd+3mGMbOoSNm38k= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-340-A4vm1f_pNRqwjRFzk--NuQ-1; Fri, 12 Mar 2021 09:09:20 -0500 X-MC-Unique: A4vm1f_pNRqwjRFzk--NuQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3D392EC1A0; Fri, 12 Mar 2021 14:09:19 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-112-75.ams2.redhat.com [10.36.112.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9B52F60877; Fri, 12 Mar 2021 14:09:14 +0000 (UTC) From: Laurent Vivier To: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, Jason Wang , netdev@vger.kernel.org, "Michael S. Tsirkin" , kvm@vger.kernel.org Subject: [PATCH] vhost: Fix vhost_vq_reset() Date: Fri, 12 Mar 2021 15:09:13 +0100 Message-Id: <20210312140913.788592-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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 Acked-by: Jason Wang Reviewed-by: Stefano Garzarella --- 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 a262e12c6dc2..5ccb0705beae 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -332,8 +332,8 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->error_ctx = NULL; vq->kick = 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;