From patchwork Fri Sep 25 21:09:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 260176 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 0BAFAC4741F for ; Fri, 25 Sep 2020 21:09:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C886323730 for ; Fri, 25 Sep 2020 21:09:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728476AbgIYVJu (ORCPT ); Fri, 25 Sep 2020 17:09:50 -0400 Received: from mga03.intel.com ([134.134.136.65]:48595 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728155AbgIYVJn (ORCPT ); Fri, 25 Sep 2020 17:09:43 -0400 IronPort-SDR: COEADvBIkmDAdry/YPeyf7GYF+PX7/GlNugz6VdHwJJM1p0na2sdqijcKg1x7XXZlKFcKMAusM znCtaooTLaMg== X-IronPort-AV: E=McAfee;i="6000,8403,9755"; a="161724529" X-IronPort-AV: E=Sophos;i="5.77,303,1596524400"; d="scan'208";a="161724529" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2020 14:09:42 -0700 IronPort-SDR: /oX2q61lAqWfLvsjWds7lcXkV1dhaIr/7e/63SjSsZbhP+JA/rgWWtncpN40kCYh5ZqxK9kygx s4RYRrtRaBTw== X-IronPort-AV: E=Sophos;i="5.77,303,1596524400"; d="scan'208";a="291979279" Received: from jtkirshe-desk1.jf.intel.com ([134.134.177.86]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2020 14:09:42 -0700 From: Tony Nguyen To: davem@davemloft.net Cc: Jacob Keller , netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com, anthony.l.nguyen@intel.com, Aaron Brown Subject: [net v2 4/4] ice: fix memory leak in ice_vsi_setup Date: Fri, 25 Sep 2020 14:09:30 -0700 Message-Id: <20200925210930.4049734-5-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200925210930.4049734-1-anthony.l.nguyen@intel.com> References: <20200925210930.4049734-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jacob Keller During ice_vsi_setup, if ice_cfg_vsi_lan fails, it does not properly release memory associated with the VSI rings. If we had used devres allocations for the rings, this would be ok. However, we use kzalloc and kfree_rcu for these ring structures. Using the correct label to cleanup the rings during ice_vsi_setup highlights an issue in the ice_vsi_clear_rings function: it can leave behind stale ring pointers in the q_vectors structure. When releasing rings, we must also ensure that no q_vector associated with the VSI will point to this ring again. To resolve this, loop over all q_vectors and release their ring mapping. Because we are about to free all rings, no q_vector should remain pointing to any of the rings in this VSI. Fixes: 5513b920a4f7 ("ice: Update Tx scheduler tree for VSI multi-Tx queue support") Signed-off-by: Jacob Keller Tested-by: Aaron Brown Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/ice/ice_lib.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c index 65cc78279501..ebbb8f54871c 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_lib.c @@ -1196,6 +1196,18 @@ static void ice_vsi_clear_rings(struct ice_vsi *vsi) { int i; + /* Avoid stale references by clearing map from vector to ring */ + if (vsi->q_vectors) { + ice_for_each_q_vector(vsi, i) { + struct ice_q_vector *q_vector = vsi->q_vectors[i]; + + if (q_vector) { + q_vector->tx.ring = NULL; + q_vector->rx.ring = NULL; + } + } + } + if (vsi->tx_rings) { for (i = 0; i < vsi->alloc_txq; i++) { if (vsi->tx_rings[i]) { @@ -2291,7 +2303,7 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi, if (status) { dev_err(dev, "VSI %d failed lan queue config, error %s\n", vsi->vsi_num, ice_stat_str(status)); - goto unroll_vector_base; + goto unroll_clear_rings; } /* Add switch rule to drop all Tx Flow Control Frames, of look up