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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 6F084C43381 for ; Fri, 22 Mar 2019 12:05:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C0E72082C for ; Fri, 22 Mar 2019 12:05:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553256330; bh=UCea0k/P3+ho5gJTRm7680R94NEB879XT11g8ZtgIk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z4T3HiDG0+1wwhrloYWkVavD13Cwiuqvh+fatwY1IALcLS1XxlsJjndxKA9je75p+ Kz2DJDclFB0FxmoIRD/bl+AD/t/nVOJZuctdGjjMLxcHXuni4uRrkio2zhi/zXNDyJ vGtyJ8QQqPvbKexdiNlzIGHjSdBz3jlmr4irssfs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388022AbfCVMF3 (ORCPT ); Fri, 22 Mar 2019 08:05:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:43922 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388813AbfCVMFZ (ORCPT ); Fri, 22 Mar 2019 08:05:25 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 29600206C0; Fri, 22 Mar 2019 12:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553256324; bh=UCea0k/P3+ho5gJTRm7680R94NEB879XT11g8ZtgIk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OAAnOTAK/MF1ssTm63caNkHEhwRWHgyFxj3L5t70YqYDzd2O/JpCGEPbwBB8HK/Hb L7+6Snc8tT/d45rKMedNibVMR1a7yt5rCNgbpQB8OVa/kURqLOJ6PaUDeYyulYFAd3 jZqAbdCIhrEdx08UJHuqA5iwzLxnDsB7Moed+/t0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masami Hiramatsu , Alexander Shishkin , Andrea Righi , Arnaldo Carvalho de Melo , Jiri Olsa , Linus Torvalds , Mathieu Desnoyers , Peter Zijlstra , Steven Rostedt , Thomas Gleixner , Ingo Molnar Subject: [PATCH 4.19 176/280] x86/kprobes: Prohibit probing on optprobe template code Date: Fri, 22 Mar 2019 12:15:29 +0100 Message-Id: <20190322111325.658451873@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190322111306.356185024@linuxfoundation.org> References: <20190322111306.356185024@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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Masami Hiramatsu commit 0192e6535ebe9af68614198ced4fd6d37b778ebf upstream. Prohibit probing on optprobe template code, since it is not a code but a template instruction sequence. If we modify this template, copied template must be broken. Signed-off-by: Masami Hiramatsu Cc: Alexander Shishkin Cc: Andrea Righi Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Mathieu Desnoyers Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner Cc: stable@vger.kernel.org Fixes: 9326638cbee2 ("kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation") Link: http://lkml.kernel.org/r/154998787911.31052.15274376330136234452.stgit@devbox Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/kprobes/opt.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -141,6 +141,11 @@ asm ( void optprobe_template_func(void); STACK_FRAME_NON_STANDARD(optprobe_template_func); +NOKPROBE_SYMBOL(optprobe_template_func); +NOKPROBE_SYMBOL(optprobe_template_entry); +NOKPROBE_SYMBOL(optprobe_template_val); +NOKPROBE_SYMBOL(optprobe_template_call); +NOKPROBE_SYMBOL(optprobe_template_end); #define TMPL_MOVE_IDX \ ((long)optprobe_template_val - (long)optprobe_template_entry)