From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1841884-1518709672-2-16606540083984878 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1518709671; b=r+kVjoBjuPXIuMmoOMm3yQinGA9C5iaH3vk/um/XUsDFs6E zP9IuMhy9SxWCYR4zQLlzSpPq1Q868M4Xh6J2qU3Xv8ocjIQQfVKXlUVGDt0b57Y bGbFy3vUa7JKPuENZ5az/GjTDy8fmPrMPCAkN3VnEJVAj5OyVmsKZN/XRc5/QWMo vm8l4YJOdd14y8uHINkjgYW9kf1NLSbR9Ev+R7gpRmorMmqeMqoE9iWt6ZPhGOcD I4Al+7eKJAPCuI0o34qG4smrWxzRWXnyhe3yxRspNk9ExsQaNRuAeKKyeHJfwxNZ KKvEmgxF7DnsXUXof1gkNFoVH6wDxOM7YHkjkhg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1518709671; bh=kDWu5G+9wpzI/mqTJvQgNMizqY MADd/p2T3Q09RAJOY=; b=cD31dTpibmDlqVDqB0kBgaXCLymqHQnO1BmR3u8dDO vlqb3M4HENeo2IpRN84jv7VkdnqrgljJT68arjjfJEHZ0Q/JbKUl/4WAsxYfWUJP TWQqSzOK2RImXsWaZ1COpwkKMUoizgGL5OZDcxAcxRsd4RluEwFDHnSgvkEpHN+C qK87mkd84ACmxEXd8gPNiYkTFSNeMk3y0OsQucMp6voNnD+kn8hrIPLfeUbXbffj SCDkQ5y+5eRluG9yPXHpHMHVuT4rxxN/IIH49L/blNJlkLjSzpX5hdyDSW+u0uvE o6Iog+d2bG3Ac/+HjLBSYhsHcisX77qmTybIBn43E/EA== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1424487AbeBOPrt (ORCPT ); Thu, 15 Feb 2018 10:47:49 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:36340 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1424947AbeBOPrr (ORCPT ); Thu, 15 Feb 2018 10:47:47 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Safonov <0x7f454c46@gmail.com>, Masami Hiramatsu , Al Viro , "Steven Rostedt (VMware)" Subject: [PATCH 4.15 199/202] ftrace: Remove incorrect setting of glob search field Date: Thu, 15 Feb 2018 16:18:19 +0100 Message-Id: <20180215151723.055165995@linuxfoundation.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180215151712.768794354@linuxfoundation.org> References: <20180215151712.768794354@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Steven Rostedt (VMware) commit 7b6586562708d2b3a04fe49f217ddbadbbbb0546 upstream. __unregister_ftrace_function_probe() will incorrectly parse the glob filter because it resets the search variable that was setup by filter_parse_regex(). Al Viro reported this: After that call of filter_parse_regex() we could have func_g.search not equal to glob only if glob started with '!' or '*'. In the former case we would've buggered off with -EINVAL (not = 1). In the latter we would've set func_g.search equal to glob + 1, calculated the length of that thing in func_g.len and proceeded to reset func_g.search back to glob. Suppose the glob is e.g. *foo*. We end up with func_g.type = MATCH_MIDDLE_ONLY; func_g.len = 3; func_g.search = "*foo"; Feeding that to ftrace_match_record() will not do anything sane - we will be looking for names containing "*foo" (->len is ignored for that one). Link: http://lkml.kernel.org/r/20180127031706.GE13338@ZenIV.linux.org.uk Fixes: 3ba009297149f ("ftrace: Introduce ftrace_glob structure") Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com> Reviewed-by: Masami Hiramatsu Reported-by: Al Viro Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/ftrace.c | 1 - 1 file changed, 1 deletion(-) --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -4456,7 +4456,6 @@ unregister_ftrace_function_probe_func(ch func_g.type = filter_parse_regex(glob, strlen(glob), &func_g.search, ¬); func_g.len = strlen(func_g.search); - func_g.search = glob; /* we do not support '!' for function probes */ if (WARN_ON(not))