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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED,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 5659CC004C9 for ; Tue, 7 May 2019 05:44:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24AC120675 for ; Tue, 7 May 2019 05:44:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557207869; bh=YRI2vS5gPurKLrLP0aEOIiT6Wwu2Vf5taONQIIzy4SE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1123SnN7eKeRnNXbtC6Vp9YwmMRf48xVTc8R1ggxiwR45K7m3JOlDB7LyHVWyohlN ktdAZlLEJwvT1hZLmjS71BhWxRL6NjzmCNyFsBxAP2QALdR3m7tOUplzVplFSk2UJM lf6/iveOC+xnQcBBv6Na+2Gt76EhkRRYYB9t7btA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727967AbfEGFoW (ORCPT ); Tue, 7 May 2019 01:44:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:33542 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729317AbfEGFmj (ORCPT ); Tue, 7 May 2019 01:42:39 -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 838C320675; Tue, 7 May 2019 05:42:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557207758; bh=YRI2vS5gPurKLrLP0aEOIiT6Wwu2Vf5taONQIIzy4SE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ynvT1r8sxA4NYYpfuKoSWUQ0mhZVbFyg7TK/JmExHgZcMyGnGbW1ZaA5G/4JOJwZu 9knL249OdcWzNbpJqkTGDUiDhDxHb5+WzcFrf5frErAz1l6CUE3cHEKYfhwpG5I021 7CbfFauNeEoy46TVwZwWBHgOvLLwrKY3rN3/mdg8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Rikard Falkeborn , Steven Rostedt , Tzvetomir Stoyanov , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH AUTOSEL 4.4 09/14] tools lib traceevent: Fix missing equality check for strcmp Date: Tue, 7 May 2019 01:42:11 -0400 Message-Id: <20190507054218.340-9-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190507054218.340-1-sashal@kernel.org> References: <20190507054218.340-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rikard Falkeborn [ Upstream commit f32c2877bcb068a718bb70094cd59ccc29d4d082 ] There was a missing comparison with 0 when checking if type is "s64" or "u64". Therefore, the body of the if-statement was entered if "type" was "u64" or not "s64", which made the first strcmp() redundant since if type is "u64", it's not "s64". If type is "s64", the body of the if-statement is not entered but since the remainder of the function consists of if-statements which will not be entered if type is "s64", we will just return "val", which is correct, albeit at the cost of a few more calls to strcmp(), i.e., it will behave just as if the if-statement was entered. If type is neither "s64" or "u64", the body of the if-statement will be entered incorrectly and "val" returned. This means that any type that is checked after "s64" and "u64" is handled the same way as "s64" and "u64", i.e., the limiting of "val" to fit in for example "s8" is never reached. This was introduced in the kernel tree when the sources were copied from trace-cmd in commit f7d82350e597 ("tools/events: Add files to create libtraceevent.a"), and in the trace-cmd repo in 1cdbae6035cei ("Implement typecasting in parser") when the function was introduced, i.e., it has always behaved the wrong way. Detected by cppcheck. Signed-off-by: Rikard Falkeborn Reviewed-by: Steven Rostedt (VMware) Cc: Tzvetomir Stoyanov Fixes: f7d82350e597 ("tools/events: Add files to create libtraceevent.a") Link: http://lkml.kernel.org/r/20190409091529.2686-1-rikard.falkeborn@gmail.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/lib/traceevent/event-parse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 743746a3c50d..df3c73e9dea4 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2201,7 +2201,7 @@ eval_type_str(unsigned long long val, const char *type, int pointer) return val & 0xffffffff; if (strcmp(type, "u64") == 0 || - strcmp(type, "s64")) + strcmp(type, "s64") == 0) return val; if (strcmp(type, "s8") == 0) -- 2.20.1