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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 E92D1C43332 for ; Wed, 18 Mar 2020 20:58:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B37A820A8B for ; Wed, 18 Mar 2020 20:58:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584565121; bh=CsM8V2CQnyjC90orvntK+0kSmFRCj8crCFyUUVSPRKA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FcWX2yRrkHrp/tRNlWOm00SFtaePnmzOA05JCwne9/uPXCmhhnuuI435AaW4j6TTX 4c/TVaZGKkrUabs/0sJA/LHnXPtuKh9X1xybWMtWauzLrIO0Ax+iMWzTuN6Is1bPTu ZSctJT4iQ+1i+hMe2zGQIzmJlo3u9tHzysJomF2U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728726AbgCRU6f (ORCPT ); Wed, 18 Mar 2020 16:58:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:58462 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728258AbgCRU5B (ORCPT ); Wed, 18 Mar 2020 16:57:01 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 06518208E4; Wed, 18 Mar 2020 20:56:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584565020; bh=CsM8V2CQnyjC90orvntK+0kSmFRCj8crCFyUUVSPRKA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BbOIyhGjzdUvb31a5qUOS4lcoBK+vpRRZ/E/l1YeMPv6E9Z/MDCtuWicpco3FUgA3 nBNnpAlq7olR/Lnzi04eUxwCzDBu/EQk8sm0+WeAQkq2i/6g+W05AkfpGVvzTihGhc Saa+Z4/Fk1E9aoIBpCprmHzu8G2+9tIEcWAHBny4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dominik Czarnota , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 10/12] sxgbe: Fix off by one in samsung driver strncpy size arg Date: Wed, 18 Mar 2020 16:56:46 -0400 Message-Id: <20200318205648.17937-10-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200318205648.17937-1-sashal@kernel.org> References: <20200318205648.17937-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Dominik Czarnota [ Upstream commit f3cc008bf6d59b8d93b4190e01d3e557b0040e15 ] This patch fixes an off-by-one error in strncpy size argument in drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c. The issue is that in: strncmp(opt, "eee_timer:", 6) the passed string literal: "eee_timer:" has 10 bytes (without the NULL byte) and the passed size argument is 6. As a result, the logic will also accept other, malformed strings, e.g. "eee_tiXXX:". This bug doesn't seem to have any security impact since its present in module's cmdline parsing code. Signed-off-by: Dominik Czarnota Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index 413ea14ab91f7..56cdc01c58477 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -2315,7 +2315,7 @@ static int __init sxgbe_cmdline_opt(char *str) if (!str || !*str) return -EINVAL; while ((opt = strsep(&str, ",")) != NULL) { - if (!strncmp(opt, "eee_timer:", 6)) { + if (!strncmp(opt, "eee_timer:", 10)) { if (kstrtoint(opt + 10, 0, &eee_timer)) goto err; } -- 2.20.1