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=-19.4 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,URIBL_BLOCKED,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 7BB4DC28B24 for ; Thu, 9 Sep 2021 12:39:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71FFC6121F for ; Thu, 9 Sep 2021 12:39:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354917AbhIIMju (ORCPT ); Thu, 9 Sep 2021 08:39:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:34528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347175AbhIIM0P (ORCPT ); Thu, 9 Sep 2021 08:26:15 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DF7AE61355; Thu, 9 Sep 2021 11:51:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631188306; bh=WygAbG7iP1zh71CPbUOS9aJO6ys4FnuEnntvpvMb+oM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C+H9bofmqBI1QXRByAikK+Zko58AB02QXQ6abamDilgmr1j7gm8OTmA6bWE/gmfZm wglOTrbuIymn2lu6y6Nr4X0pvZ8BpnpR41IdntkkJesPtaM0jCFTCfsL7FDemne3Dd Fje0Dd1Nbh9pjGs+jdpm+p2Ej7UqunacZija8p2ollNj8ZYxfBq/bEtZp3ecCMXBEj LUNGRv96/TuG+OszGoNj6+i7fbrkHspuo/Jkvf7bDIrSLVf1DkCMw8EZSLCBtSaO9i cjFr0Vjsu6ut2nlFYlDPxsKsIi+HBF1ZyPysK9pfPuQ3SkOTYj5l2XgHKJ4xR/pqKY QhLzJH1cKjInw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sasha Neftin , Aleksandr Loktionov , Dvora Fuxbrumer , Tony Nguyen , Sasha Levin , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 022/176] igc: Check if num of q_vectors is smaller than max before array access Date: Thu, 9 Sep 2021 07:48:44 -0400 Message-Id: <20210909115118.146181-22-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210909115118.146181-1-sashal@kernel.org> References: <20210909115118.146181-1-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: linux-kernel@vger.kernel.org From: Sasha Neftin [ Upstream commit 373e2829e7c2e1e606503cdb5c97749f512a4be9 ] Ensure that the adapter->q_vector[MAX_Q_VECTORS] array isn't accessed beyond its size. It was fixed by using a local variable num_q_vectors as a limit for loop index, and ensure that num_q_vectors is not bigger than MAX_Q_VECTORS. Suggested-by: Aleksandr Loktionov Signed-off-by: Sasha Neftin Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/igc/igc_main.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 013dd2955381..cae090a07252 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -4083,6 +4083,7 @@ static irqreturn_t igc_msix_ring(int irq, void *data) */ static int igc_request_msix(struct igc_adapter *adapter) { + unsigned int num_q_vectors = adapter->num_q_vectors; int i = 0, err = 0, vector = 0, free_vector = 0; struct net_device *netdev = adapter->netdev; @@ -4091,7 +4092,13 @@ static int igc_request_msix(struct igc_adapter *adapter) if (err) goto err_out; - for (i = 0; i < adapter->num_q_vectors; i++) { + if (num_q_vectors > MAX_Q_VECTORS) { + num_q_vectors = MAX_Q_VECTORS; + dev_warn(&adapter->pdev->dev, + "The number of queue vectors (%d) is higher than max allowed (%d)\n", + adapter->num_q_vectors, MAX_Q_VECTORS); + } + for (i = 0; i < num_q_vectors; i++) { struct igc_q_vector *q_vector = adapter->q_vector[i]; vector++; -- 2.30.2