From nobody Fri Sep 20 13:19:38 2024 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 7EE8BEE57CA for ; Fri, 8 Sep 2023 06:21:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241084AbjIHGVm (ORCPT ); Fri, 8 Sep 2023 02:21:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240720AbjIHGVk (ORCPT ); Fri, 8 Sep 2023 02:21:40 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 449B31BE9; Thu, 7 Sep 2023 23:21:34 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id d9443c01a7336-1b89b0c73d7so3335215ad.1; Thu, 07 Sep 2023 23:21:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1694154094; x=1694758894; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=EdlxO8xCKrQy/jRT0nkbbxVM9BFP+RkDY99mRvExc+k=; b=jVK9HFTeboxtCz+n9j5O0uYCYEiitQ2KcVh0a5q33dldLAdceiWj68Fh2pScdBaIoO PUoRytI0EEUi9TAIT/EIQuD4HHoHu2kI7nYOw+pjVbaEHPrOgxvxyBr5K/zpjD3o6Yns 8vSUbau21hI/mdYD7DXT769sftq1NLkYNan+n1cMxB0oc6fKaoiJ6nAHrBcdjm8doNXJ lKlC2b4MwC8Ev/ebjFpB0g9YJBZ65oyZUlF1fPb9R5Nq3GUT7NCSQSNYjRKhbjkRa5Zp b3HkKfJtie0mntKpWkqcc+y9OQHsd/PdKiHrYERTpbevatfncv8OeN4kh++A7WD1CPg4 qJyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694154094; x=1694758894; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=EdlxO8xCKrQy/jRT0nkbbxVM9BFP+RkDY99mRvExc+k=; b=i8MMo0lRWLPA1x9yzvZMX82dz2WKMMap01dU6kZt//fOxqhA9zTi5aEFLkflAbciPg 2wPLMzMXkqcn5VRzESjacGqkqR+ukcm4J360wtlVSMBaibsXKdnuwTyVzqGwlT4YTk0J 6RW7PGsAU9XnPpIcFnO/HvrqTNiow4QbYQf2MV4zK6tqSd5V9QmRqqcM9bYYz9glil05 GqomSyigUNQ7Fq1Q2T8FUTrCbgsnIfw2ReiMRyMzcb1eSmQ3kr+MhVn+YRVFubE34tzs IZy24BEpTQs+dmh4rZyFPP6984i6txRLfVBc0ZX8lzdIEfAmy6YQqommaUkHUhd/JH31 Y/qQ== X-Gm-Message-State: AOJu0Yz8FcjKBcZUgL2/uXpMKdV5AC4pq0UGKMtlaDwsi4kzJveuJMEH 1DDVoriauBspmMNYFv0iibQ= X-Google-Smtp-Source: AGHT+IFtdbDXX/f6kthEXzxe3IPBBobkRzWDXfCM/Z8uOIZugSIsTKjKzDPEZO02Vum21D08dqAq4A== X-Received: by 2002:a17:902:e751:b0:1c3:2af5:19f3 with SMTP id p17-20020a170902e75100b001c32af519f3mr1732109plf.5.1694154093626; Thu, 07 Sep 2023 23:21:33 -0700 (PDT) Received: from hbh25y.mshome.net ([103.114.158.1]) by smtp.gmail.com with ESMTPSA id l7-20020a170902f68700b001b8c6890623sm768620plg.7.2023.09.07.23.21.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Sep 2023 23:21:32 -0700 (PDT) From: Hangyu Hua To: justin.chen@broadcom.com, florian.fainelli@broadcom.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mw@semihalf.com, linux@armlinux.org.uk, nbd@nbd.name, john@phrozen.org, sean.wang@mediatek.com, Mark-MC.Lee@mediatek.com, lorenzo@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, maxime.chevallier@bootlin.com, nelson.chang@mediatek.com Cc: bcm-kernel-feedback-list@broadcom.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Hangyu Hua Subject: [PATCH v2 2/3] net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc() Date: Fri, 8 Sep 2023 14:19:49 +0800 Message-Id: <20230908061950.20287-3-hbh25y@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230908061950.20287-1-hbh25y@gmail.com> References: <20230908061950.20287-1-hbh25y@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" rules is allocated in ethtool_get_rxnfc and the size is determined by rule_cnt from user space. So rule_cnt needs to be check before using rules to avoid OOB writing or NULL pointer dereference. Fixes: 90b509b39ac9 ("net: mvpp2: cls: Add Classification offload support") Signed-off-by: Hangyu Hua Reviewed-by: Marcin Wojtas Reviewed-by: Russell King (Oracle) --- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/= ethernet/marvell/mvpp2/mvpp2_main.c index eb74ccddb440..21c3f9b015c8 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -5586,6 +5586,11 @@ static int mvpp2_ethtool_get_rxnfc(struct net_device= *dev, break; case ETHTOOL_GRXCLSRLALL: for (i =3D 0; i < MVPP2_N_RFS_ENTRIES_PER_FLOW; i++) { + if (loc =3D=3D info->rule_cnt) { + ret =3D -EMSGSIZE; + break; + } + if (port->rfs_rules[i]) rules[loc++] =3D i; } --=20 2.34.1