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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AA96C77B73 for ; Mon, 22 May 2023 19:42:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235082AbjEVTmN (ORCPT ); Mon, 22 May 2023 15:42:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235093AbjEVTmI (ORCPT ); Mon, 22 May 2023 15:42:08 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4839310F9 for ; Mon, 22 May 2023 12:41:44 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id BE98962A26 for ; Mon, 22 May 2023 19:41:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA01CC433D2; Mon, 22 May 2023 19:41:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684784498; bh=100CBOEQouBGkjLwQkhKz1BrM0aikwl8UCC1w0QAoBk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B9+aXFaG7E24hLXi7vOkVgo81n4docm2yvsgaUz3aKFnW9ddpO8SQEPAKt7EWhate Ebp5dEnUj+TJHWF5ZUyjBfowSVB1ey2VCDyzp7RdFHmatYmlR1aDmy7pH/GdkteO22 eQpGukr4bsGuHF4iNMCwF9BE37j+iTQxzVXkO0FM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nick Child , Piotr Raczynski , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.3 102/364] net: Catch invalid index in XPS mapping Date: Mon, 22 May 2023 20:06:47 +0100 Message-Id: <20230522190415.305033152@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190412.801391872@linuxfoundation.org> References: <20230522190412.801391872@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nick Child [ Upstream commit 5dd0dfd55baec0742ba8f5625a0dd064aca7db16 ] When setting the XPS value of a TX queue, warn the user once if the index of the queue is greater than the number of allocated TX queues. Previously, this scenario went uncaught. In the best case, it resulted in unnecessary allocations. In the worst case, it resulted in out-of-bounds memory references through calls to `netdev_get_tx_queue( dev, index)`. Therefore, it is important to inform the user but not worth returning an error and risk downing the netdevice. Signed-off-by: Nick Child Reviewed-by: Piotr Raczynski Link: https://lore.kernel.org/r/20230321150725.127229-1-nnac123@linux.ibm.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/core/dev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index 8fbd241849c01..b3d8e74fcaf06 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2535,6 +2535,8 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, struct xps_map *map, *new_map; unsigned int nr_ids; + WARN_ON_ONCE(index >= dev->num_tx_queues); + if (dev->num_tc) { /* Do not allow XPS on subordinate device directly */ num_tc = dev->num_tc; -- 2.39.2