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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4FE19C43381 for ; Tue, 12 Mar 2019 02:04:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1EDD9214D8 for ; Tue, 12 Mar 2019 02:04:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552356259; bh=2uihvhbYNTPwWXGqP31wRkXN0WtcFnzMbQOux+O6tP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iK2cCOt+7lHFtTTNxR6G3xrHjjn6PCBYlrMgKoey3FUfQZXNiIqcGE3xO/6U2qOLW eP95U6uXAbAZY71ch+x2worjpOcD1ZRbdo7NLtgYHr+G72KWVsb9CUmXf78oRzF8jj kDOnFAhmTHuwhH3/igVNN9PbayhpGFrcnZstgMBk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727261AbfCLCER (ORCPT ); Mon, 11 Mar 2019 22:04:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:37906 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726856AbfCLCEA (ORCPT ); Mon, 11 Mar 2019 22:04:00 -0400 Received: from quaco.meukeo.local (unknown [179.97.35.11]) (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 6DD01217F5; Tue, 12 Mar 2019 02:03:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552356239; bh=2uihvhbYNTPwWXGqP31wRkXN0WtcFnzMbQOux+O6tP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Arp+7csImoecbZg6PQIfqMawymcAU90AtS3P1DDTRBtfkCKNPeeHB7DQZPtUBBkK5 Z/8nH1R7qVV6UiWAaVmqY2ota4a81DhUEAyZqZfzh1yfAQgv4m+WNBtVEPBnK25zIc 4oYUwD6/CvTTujOd2LwVbaPfkxtR/X0HEZ1bgpw8= From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Andi Kleen , Arnaldo Carvalho de Melo Subject: [PATCH 28/30] perf script: Add array bound checking to list_scripts Date: Mon, 11 Mar 2019 23:02:02 -0300 Message-Id: <20190312020204.22092-29-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312020204.22092-1-acme@kernel.org> References: <20190312020204.22092-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen Don't overflow array when the scripts directory is too large, or the script file name is too long. Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20190311144502.15423-11-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-script.c | 8 ++++++-- tools/perf/builtin.h | 3 ++- tools/perf/ui/browsers/scripts.c | 3 ++- 3 files changed, 10 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index b695b20ffc8a..2f93d60c5a17 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -2982,7 +2982,8 @@ static int check_ev_match(char *dir_name, char *scriptname, * will list all statically runnable scripts, select one, execute it and * show the output in a perf browser. */ -int find_scripts(char **scripts_array, char **scripts_path_array) +int find_scripts(char **scripts_array, char **scripts_path_array, int num, + int pathlen) { struct dirent *script_dirent, *lang_dirent; char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN]; @@ -3027,7 +3028,10 @@ int find_scripts(char **scripts_array, char **scripts_path_array) /* Skip those real time scripts: xxxtop.p[yl] */ if (strstr(script_dirent->d_name, "top.")) continue; - sprintf(scripts_path_array[i], "%s/%s", lang_path, + if (i >= num) + break; + snprintf(scripts_path_array[i], pathlen, "%s/%s", + lang_path, script_dirent->d_name); temp = strchr(script_dirent->d_name, '.'); snprintf(scripts_array[i], diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h index 05745f3ce912..999fe9170122 100644 --- a/tools/perf/builtin.h +++ b/tools/perf/builtin.h @@ -40,5 +40,6 @@ int cmd_mem(int argc, const char **argv); int cmd_data(int argc, const char **argv); int cmd_ftrace(int argc, const char **argv); -int find_scripts(char **scripts_array, char **scripts_path_array); +int find_scripts(char **scripts_array, char **scripts_path_array, int num, + int pathlen); #endif diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c index cdba58447b85..96e5cd3b0eee 100644 --- a/tools/perf/ui/browsers/scripts.c +++ b/tools/perf/ui/browsers/scripts.c @@ -97,7 +97,8 @@ static int list_scripts(char *script_name, bool *custom, paths[i] = names[i] + SCRIPT_NAMELEN; } - num = find_scripts(names + max_std, paths + max_std); + num = find_scripts(names + max_std, paths + max_std, SCRIPT_MAX_NO - max_std, + SCRIPT_FULLPATH_LEN); if (num < 0) num = 0; choice = ui__popup_menu(num + max_std, (char * const *)names); -- 2.20.1