From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D328440C for ; Wed, 6 Sep 2023 09:22:12 +0000 (UTC) Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5ACD9CC2; Wed, 6 Sep 2023 02:22:11 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id 98e67ed59e1d1-27197b0b733so721187a91.1; Wed, 06 Sep 2023 02:22:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693992131; x=1694596931; 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=Fn+jXRrDrAEw7CfX+G9Zj1hLr/gSQRyi9u7mHipUA4E=; b=N+fWz0yVbcdCXfxUkV91rUhqVvDmhv9OAVcAH6agg4p8UjcNFSLvxhMct/P4CEwm4x zLHPk+X6mQcGc7scY7AVi9ngd7niUJPPEYLAbd0xnVQzS3Iv8UMAFM23ujruLuXzTdBs mewFrIMZaClC5nRXygxuc4N+bP7snbC1P4kcN/Yt4cdi/cGq5mJSQoZ24NGaqwu53GVr 4n0gWGK8wiUlfZaAeOSNRkLYNTnoQr+WWECnWQQZltUwXoLjppxiDO58g1Q4AGQRNPo+ IuKH300DbhSFd6xOlu8g0MZcaqNXxEanGAGpcLrQMnMSEX5qRzCT1zxfOPPrgpe91XzM 4snA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693992131; x=1694596931; 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=Fn+jXRrDrAEw7CfX+G9Zj1hLr/gSQRyi9u7mHipUA4E=; b=IqkykrMqcqQPzdEFO/tgGPkmDMS1WmCGlz0+foyNWoVkaGxnWsd3ZJ6zYI9q6ZvQPH 7bacnmlX/RlLkvE5lBzbNUPfjUiteL9qfy9AgXR4W+3494/zSOElgXZzHIQ4j4OjErSd KXk/Y4xVrOqkJr1iE/f6IM7TUeA4FY2CBhhFmhOzelXClAl4WTsO1fBxpscFh534tgCz xB+8pyku0YjQ0EFZhtjjnRVG4jby6ndt2njD4y9qp234wo43w+hhe8dExG9MqaoxeCud BBwqFgGUotMBZSTz98+dt2+VNhinMmSRB+rH8WXqXFGi1Ibs2VBdS/Sus/7pvAGNEyMs RlcA== X-Gm-Message-State: AOJu0YyHivJ1rx8a3ZRjaBk51mXdk8UdskD4pZYUXwKNW3MX12vEbQ2D MtVkxC8KPsFl0yK9Pd9m2ns= X-Google-Smtp-Source: AGHT+IFOd5uWXjG5sRVrnc1uN2B+x7New4jEPSE8eT/hxhjfSvF95rsX2Pmpq4DVWgFU4xsFEmIoJA== X-Received: by 2002:a17:90a:4dc7:b0:263:2312:60c2 with SMTP id r7-20020a17090a4dc700b00263231260c2mr13836784pjl.3.1693992130736; Wed, 06 Sep 2023 02:22:10 -0700 (PDT) Received: from hbh25y.mshome.net ([103.114.158.1]) by smtp.gmail.com with ESMTPSA id ft15-20020a17090b0f8f00b002684b837d88sm10679242pjb.14.2023.09.06.02.22.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Sep 2023 02:22:10 -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 1/3] net: ethernet: bcmasp: fix possible OOB write in bcmasp_netfilt_get_all_active() Date: Wed, 6 Sep 2023 17:21:05 +0800 Message-Id: <20230906092107.19063-2-hbh25y@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230906092107.19063-1-hbh25y@gmail.com> References: <20230906092107.19063-1-hbh25y@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net rule_locs 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 rule_locs to avoid OOB writing or NULL pointer dereference. Fixes: c5d511c49587 ("net: bcmasp: Add support for wake on net filters") Signed-off-by: Hangyu Hua --- drivers/net/ethernet/broadcom/asp2/bcmasp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c index d63d321f3e7b..4df2ca871af8 100644 --- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c +++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c @@ -535,6 +535,9 @@ void bcmasp_netfilt_get_all_active(struct bcmasp_intf *intf, u32 *rule_locs, int j = 0, i; for (i = 0; i < NUM_NET_FILTERS; i++) { + if (j == *rule_cnt) + break; + if (!priv->net_filters[i].claimed || priv->net_filters[i].port != intf->port) continue; -- 2.34.1