From patchwork Mon Apr 12 08:39:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 419971 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=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 2248CC43461 for ; Mon, 12 Apr 2021 09:03:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF71B613B2 for ; Mon, 12 Apr 2021 09:03:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238745AbhDLJDp (ORCPT ); Mon, 12 Apr 2021 05:03:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:54824 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237704AbhDLJBm (ORCPT ); Mon, 12 Apr 2021 05:01:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E665460241; Mon, 12 Apr 2021 09:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618218025; bh=/68vqr8FnoWZIGzu1nMiYubZM/avCAEBOkMNwca8iz4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k4c5/3iA7FQB8gaJ/e4y5DMaUXFg4EeIV549UVZbBpM8aYGjmQYoTsdeVMvafmIB0 gje27UO55YeynUCTNRSGgCOfyfmSxG9ZbO/H/tcflBNx4YEzq7LzXPnXjTEV7exQx4 R9k2a+40hSSiQSfTceASyHL364Mj/a0vYz2tvZV0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Krzysztof Goreczny , Tony Brelinski , Tony Nguyen Subject: [PATCH 5.11 042/210] ice: prevent ice_open and ice_stop during reset Date: Mon, 12 Apr 2021 10:39:07 +0200 Message-Id: <20210412084017.415235078@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210412084016.009884719@linuxfoundation.org> References: <20210412084016.009884719@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Krzysztof Goreczny commit e95fc8573e07c5e4825df4650fd8b8c93fad27a7 upstream. There is a possibility of race between ice_open or ice_stop calls performed by OS and reset handling routine both trying to modify VSI resources. Observed scenarios: - reset handler deallocates memory in ice_vsi_free_arrays and ice_open tries to access it in ice_vsi_cfg_txq leading to driver crash - reset handler deallocates memory in ice_vsi_free_arrays and ice_close tries to access it in ice_down leading to driver crash - reset handler clears port scheduler topology and sets port state to ICE_SCHED_PORT_STATE_INIT leading to ice_ena_vsi_txq fail in ice_open To prevent this additional checks in ice_open and ice_stop are introduced to make sure that OS is not allowed to alter VSI config while reset is in progress. Fixes: cdedef59deb0 ("ice: Configure VSIs for Tx/Rx") Signed-off-by: Krzysztof Goreczny Tested-by: Tony Brelinski Signed-off-by: Tony Nguyen Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/ice/ice.h | 1 + drivers/net/ethernet/intel/ice/ice_lib.c | 4 ++-- drivers/net/ethernet/intel/ice/ice_main.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 31 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -604,6 +604,7 @@ int ice_fdir_create_dflt_rules(struct ic int ice_aq_wait_for_event(struct ice_pf *pf, u16 opcode, unsigned long timeout, struct ice_rq_event_info *event); int ice_open(struct net_device *netdev); +int ice_open_internal(struct net_device *netdev); int ice_stop(struct net_device *netdev); void ice_service_task_schedule(struct ice_pf *pf); --- a/drivers/net/ethernet/intel/ice/ice_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_lib.c @@ -2489,7 +2489,7 @@ int ice_ena_vsi(struct ice_vsi *vsi, boo if (!locked) rtnl_lock(); - err = ice_open(vsi->netdev); + err = ice_open_internal(vsi->netdev); if (!locked) rtnl_unlock(); @@ -2518,7 +2518,7 @@ void ice_dis_vsi(struct ice_vsi *vsi, bo if (!locked) rtnl_lock(); - ice_stop(vsi->netdev); + ice_vsi_close(vsi); if (!locked) rtnl_unlock(); --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -6612,6 +6612,28 @@ static void ice_tx_timeout(struct net_de int ice_open(struct net_device *netdev) { struct ice_netdev_priv *np = netdev_priv(netdev); + struct ice_pf *pf = np->vsi->back; + + if (ice_is_reset_in_progress(pf->state)) { + netdev_err(netdev, "can't open net device while reset is in progress"); + return -EBUSY; + } + + return ice_open_internal(netdev); +} + +/** + * ice_open_internal - Called when a network interface becomes active + * @netdev: network interface device structure + * + * Internal ice_open implementation. Should not be used directly except for ice_open and reset + * handling routine + * + * Returns 0 on success, negative value on failure + */ +int ice_open_internal(struct net_device *netdev) +{ + struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_vsi *vsi = np->vsi; struct ice_pf *pf = vsi->back; struct ice_port_info *pi; @@ -6690,6 +6712,12 @@ int ice_stop(struct net_device *netdev) { struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_vsi *vsi = np->vsi; + struct ice_pf *pf = vsi->back; + + if (ice_is_reset_in_progress(pf->state)) { + netdev_err(netdev, "can't stop net device while reset is in progress"); + return -EBUSY; + } ice_vsi_close(vsi);