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=-15.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,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 8DA9AC282C7 for ; Thu, 24 Jan 2019 19:33:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5DF5C218FC for ; Thu, 24 Jan 2019 19:33:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358422; bh=B7IGmMgEMnEj1evlOzQmsySMwo6LDCg2gxCebKLMdp0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TnCtEg7nAyHkHKW850eqJ/lTODiM+aoUilMh5Fl+QhXeLbMSFcSo09iN8Fyw8jO7F k+qyZ/KCj5/Ui/bd0X7mT+LPOhjEw08UVpfwDpxetiV+n63HLCw5I9zmx/a5ytgQUl B2aos6bQpLjIEO76Wv7x38GtfwPzlkc11Wy7WyUk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731370AbfAXTdl (ORCPT ); Thu, 24 Jan 2019 14:33:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:33408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732034AbfAXTdi (ORCPT ); Thu, 24 Jan 2019 14:33:38 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4BECC218FC; Thu, 24 Jan 2019 19:33:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358417; bh=B7IGmMgEMnEj1evlOzQmsySMwo6LDCg2gxCebKLMdp0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xkV0U1RWpbExW+NOwzCNvK6EYp827aLNjP8REU+ywXAkALghBeseh3U5N5AeWHXW/ WWI5adIKuEgPoDl3X8MEYJ/akX9W2Tu3vXG0/HQ+ahZiCswtY4Bz3R5m/l4K8ymQ0l tKKhEjAF8HS0P2/ss3qjjJbJul4G/heYkwqLDWTk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adrian Hunter , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 4.14 40/63] perf parse-events: Fix unchecked usage of strncpy() Date: Thu, 24 Jan 2019 20:20:29 +0100 Message-Id: <20190124190159.894549029@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190155.176570028@linuxfoundation.org> References: <20190124190155.176570028@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit bd8d57fb7e25e9fcf67a9eef5fa13aabe2016e07 ] The strncpy() function may leave the destination string buffer unterminated, better use strlcpy() that we have a __weak fallback implementation for systems without it. This fixes this warning on an Alpine Linux Edge system with gcc 8.2: util/parse-events.c: In function 'print_symbol_events': util/parse-events.c:2465:4: error: 'strncpy' specified bound 100 equals destination size [-Werror=stringop-truncation] strncpy(name, syms->symbol, MAX_NAME_LEN); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'print_symbol_events.constprop', inlined from 'print_events' at util/parse-events.c:2508:2: util/parse-events.c:2465:4: error: 'strncpy' specified bound 100 equals destination size [-Werror=stringop-truncation] strncpy(name, syms->symbol, MAX_NAME_LEN); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'print_symbol_events.constprop', inlined from 'print_events' at util/parse-events.c:2511:2: util/parse-events.c:2465:4: error: 'strncpy' specified bound 100 equals destination size [-Werror=stringop-truncation] strncpy(name, syms->symbol, MAX_NAME_LEN); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Fixes: 947b4ad1d198 ("perf list: Fix max event string size") Link: https://lkml.kernel.org/n/tip-b663e33bm6x8hrkie4uxh7u2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/parse-events.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 53f620472151..d0b92d374ba9 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -2300,7 +2300,7 @@ restart: if (!name_only && strlen(syms->alias)) snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); else - strncpy(name, syms->symbol, MAX_NAME_LEN); + strlcpy(name, syms->symbol, MAX_NAME_LEN); evt_list[evt_i] = strdup(name); if (evt_list[evt_i] == NULL) -- 2.19.1