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=-18.8 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, 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 D0BEBC43616 for ; Mon, 5 Apr 2021 09:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABB5F613A4 for ; Mon, 5 Apr 2021 09:05:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238164AbhDEJEc (ORCPT ); Mon, 5 Apr 2021 05:04:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:46320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237638AbhDEJDW (ORCPT ); Mon, 5 Apr 2021 05:03:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E344A6128A; Mon, 5 Apr 2021 09:03:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617613395; bh=khVMeroJE9TqWHtGxQZsHpu5jSfqIAr/VTELrdLP8WQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F2T4nuaYNvsAHVe83cV2F8Q4emLQKcE+DkCCfgmwEtSlOh9IU7b2yKYhugJOSaJ+V MmGpJUd1oV6maixJHk7rzyV4fj2XcDfKvDdby2kTlK+czOrCVxmyo3HVYDHn9c+eQm eMseh7LNpN/yuCmxXWIGBbJAFkPw4yjALgZOcPVM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Laurent Vivier , "Michael S. Tsirkin" , Sasha Levin Subject: [PATCH 5.4 21/74] vhost: Fix vhost_vq_reset() Date: Mon, 5 Apr 2021 10:53:45 +0200 Message-Id: <20210405085025.411059749@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210405085024.703004126@linuxfoundation.org> References: <20210405085024.703004126@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 57ab79fbcee9..a279ecacbf60 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -320,8 +320,8 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->kick = NULL; vq->call_ctx = 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