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=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 E42C4C31E5C for ; Mon, 17 Jun 2019 21:20:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B2EFE208CB for ; Mon, 17 Jun 2019 21:20:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560806434; bh=iMJZBU2UkJd2A7Q2CPPqhoaU8qote8ye4jNhz0Q8s3E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NQbZSdwlKMS2W8JxXCu1jlN8SYbgWh45PG/XBA3nrT/U2wxI4XxYPJXk/NINy/Vmo FDDEBWBvvsX045+ErqSa/UxM0ti49spdENBOfKDbJ/VxzKbO6dsFF7VuNLaQLrPbGp MbsyjdOcrim2SQj0DkZ3QMoehV6Hpdtr2FiuebyU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729144AbfFQVUd (ORCPT ); Mon, 17 Jun 2019 17:20:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:44732 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728339AbfFQVUa (ORCPT ); Mon, 17 Jun 2019 17:20:30 -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 40B6120B1F; Mon, 17 Jun 2019 21:20:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560806429; bh=iMJZBU2UkJd2A7Q2CPPqhoaU8qote8ye4jNhz0Q8s3E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fdyYkEWbVqJXDEqtsUKwgzbs4CQsaAkIDYwNODqDElsoa4zYUuviA6hHfLdIPEB82 jlPGid9aD7L6SVK3RpGOg735fhTjlXBqLehPOy3mAr1hPDq61IbXUGUkSPq5lvmv2a aYNHrxis0fBh2fcmw1Auuku3hLm1CG+shTTX7v8Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Peter Zijlstra (Intel)" , Borislav Petkov , Josh Poimboeuf , Linus Torvalds , Thomas Gleixner , Ingo Molnar , Sasha Levin Subject: [PATCH 5.1 042/115] x86/uaccess, kcov: Disable stack protector Date: Mon, 17 Jun 2019 23:09:02 +0200 Message-Id: <20190617210802.173135786@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190617210759.929316339@linuxfoundation.org> References: <20190617210759.929316339@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 40ea97290b08be2e038b31cbb33097d1145e8169 ] New tooling noticed this mishap: kernel/kcov.o: warning: objtool: write_comp_data()+0x138: call to __stack_chk_fail() with UACCESS enabled kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0xd9: call to __stack_chk_fail() with UACCESS enabled All the other instrumentation (KASAN,UBSAN) also have stack protector disabled. Signed-off-by: Peter Zijlstra (Intel) Cc: Borislav Petkov Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Sasha Levin --- kernel/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/Makefile b/kernel/Makefile index 6c57e78817da..62471e75a2b0 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -30,6 +30,7 @@ KCOV_INSTRUMENT_extable.o := n # Don't self-instrument. KCOV_INSTRUMENT_kcov.o := n KASAN_SANITIZE_kcov.o := n +CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) # cond_syscall is currently not LTO compatible CFLAGS_sys_ni.o = $(DISABLE_LTO) -- 2.20.1