From patchwork Mon Nov 30 00:21:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Hemminger X-Patchwork-Id: 335073 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 6DF05C64E7D for ; Mon, 30 Nov 2020 00:22:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3629D2073C for ; Mon, 30 Nov 2020 00:22:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=networkplumber-org.20150623.gappssmtp.com header.i=@networkplumber-org.20150623.gappssmtp.com header.b="e4z8twir" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728537AbgK3AWi (ORCPT ); Sun, 29 Nov 2020 19:22:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726470AbgK3AWi (ORCPT ); Sun, 29 Nov 2020 19:22:38 -0500 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23C4CC0613D3 for ; Sun, 29 Nov 2020 16:21:52 -0800 (PST) Received: by mail-pl1-x62b.google.com with SMTP id u2so5476204pls.10 for ; Sun, 29 Nov 2020 16:21:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=fKMan7oWGvWyjqMhG7qMLjXbclAI34cwErrXXBHsZqg=; b=e4z8twirx+GIHIP3GV6Nd2w33uGii2KiSZiH37qGJSBmqifDHgfZhQcdI12WJUDT46 k0zWaJtXn4WKVa6+n6xnJVWMjWmpeEQEXgEuWga0DeppUgSaNRVvzNeFXzZHywtAOaWV Uii9oedA5NQDuVPa6KEkMDNok9WhzETeRxcgWhnfWHSuVZ8rz3cJZgSXrNKfUKdxrGON 93oOm1d6Rxgehm0QkcXGB8pKB+APeQhPk8l0IQtdb+sBITEp7sCxffRuO8CSuXQzyzdo LOQvZiXpcaAZaZfMAwJtxrItYVVjaXxonWdKVTO4c0qqOTSAO3D9SCICgqXHbXZYY7Yi 1P3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=fKMan7oWGvWyjqMhG7qMLjXbclAI34cwErrXXBHsZqg=; b=qS4xYq8FSrcqfaTQF8lpon7iDlCIktNdmn5/nV83MqFf8ArZZGNFX02lW6RlfhVmlB zwmJlg6y9/aO6n0al38dVBhIvt4EUW4hri/aMt+b1WfSBLFqf9jmeDgnQO54ASNnD2sQ pa65ihBsJ5VZlIMLcIYJU99dgINtKictlBIDP1Tprf30aA6nTbzVleyKPPqB0ueE7cIo bdFHTVPRuyvx43kBbG/+r8d8OgD/byIUaBZ/gFOu4IJWXgcQOIIMxCYhcJCmXCk0S4xD 2vQSlRTQTnrk2XPrqoxZGfNIhr6T/eZs1YzAHu9rzfh3lkcWV3JIC2odjs26faYtPNmp odAg== X-Gm-Message-State: AOAM531xFQPPs2Zdf2uAaGofjwKhehPx7XmTgkqexSaRiOITqDfKU1Fy 2GySfG8dZNj1oIhp/cr9v+SNpPA9okDXumKc X-Google-Smtp-Source: ABdhPJyqJ2m2lMIcuckfrHh43XYHph7ECe2ig3XckhHLGVp7j/QHOkuM3Y4UhOwGQf5LgIvb1yKKPw== X-Received: by 2002:a17:902:eb53:b029:d9:e57a:e402 with SMTP id i19-20020a170902eb53b02900d9e57ae402mr16398047pli.85.1606695711236; Sun, 29 Nov 2020 16:21:51 -0800 (PST) Received: from hermes.local (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id d3sm20746129pji.26.2020.11.29.16.21.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Nov 2020 16:21:50 -0800 (PST) From: Stephen Hemminger To: netdev@vger.kernel.org Cc: Stephen Hemminger , nikolay@cumulusnetworks.com Subject: [PATCH 2/5] bridge: fix string length warning Date: Sun, 29 Nov 2020 16:21:32 -0800 Message-Id: <20201130002135.6537-3-stephen@networkplumber.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201130002135.6537-1-stephen@networkplumber.org> References: <20201130002135.6537-1-stephen@networkplumber.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Gcc-10 complains about possible string length overflow. This can't happen Ethernet address format is always limited to 18 characters or less. Just resize the temp buffer. Fixes: 70dfb0b8836d ("iplink: bridge: export bridge_id and designated_root") Cc: nikolay@cumulusnetworks.com Signed-off-by: Stephen Hemminger --- ip/iplink_bridge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ip/iplink_bridge.c b/ip/iplink_bridge.c index 3e81aa059cb3..d12fd0558f7d 100644 --- a/ip/iplink_bridge.c +++ b/ip/iplink_bridge.c @@ -74,7 +74,7 @@ static void explain(void) void br_dump_bridge_id(const struct ifla_bridge_id *id, char *buf, size_t len) { - char eaddr[32]; + char eaddr[18]; ether_ntoa_r((const struct ether_addr *)id->addr, eaddr); snprintf(buf, len, "%.2x%.2x.%s", id->prio[0], id->prio[1], eaddr);