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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 190BCC43441 for ; Sun, 11 Nov 2018 07:11:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABD0720872 for ; Sun, 11 Nov 2018 07:11:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABD0720872 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=asrmicro.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727573AbeKKQ6c (ORCPT ); Sun, 11 Nov 2018 11:58:32 -0500 Received: from asrmicro.com ([210.13.118.86]:47090 "EHLO mail2012.asrmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727334AbeKKQ6c (ORCPT ); Sun, 11 Nov 2018 11:58:32 -0500 Received: from localhost (10.38.17.127) by mail2012.asrmicro.com (10.1.24.123) with Microsoft SMTP Server (TLS) id 15.0.847.32; Sun, 11 Nov 2018 15:10:26 +0800 From: Zhizhou Zhang To: , CC: , , Subject: [PATCH] ftrace: remove KASAN poison in ftrace_ops_test() Date: Sun, 11 Nov 2018 23:10:17 +0800 Message-ID: <1541949017-3001-1-git-send-email-zhizhouzhang@asrmicro.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.38.17.127] X-ClientProxiedBy: mail2012.asrmicro.com (10.1.24.123) To mail2012.asrmicro.com (10.1.24.123) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ftrace_ops_test() passed local varible parameter to hash_contains_ip(), which could result KASAN stack-out-of-bounds warning. Signed-off-by: Zhizhou Zhang --- kernel/trace/ftrace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index f536f60..6e11f90 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1522,6 +1522,8 @@ ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs) rcu_assign_pointer(hash.filter_hash, ops->func_hash->filter_hash); rcu_assign_pointer(hash.notrace_hash, ops->func_hash->notrace_hash); + kasan_unpoison_task_stack(current); + if (hash_contains_ip(ip, &hash)) ret = 1; else -- 2.7.4