From patchwork Fri Jun 19 14:34:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224023 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 037B5C433DF for ; Fri, 19 Jun 2020 15:35:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC6F8206FA for ; Fri, 19 Jun 2020 15:35:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592580955; bh=THVtaWUnXGtkXiUpMl98ezwe7oGbMPmTprpCeiVDeSk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WzO83OpN3/a+Hy5vOTFvIEeU8KPcwfyxxeMSgZrsgRx04/zm1ZEFjSiJN1corDs5V YC/BhSMWXPGp/+8tCp+T0/NA9AU3L2St3eivpZPBJKvvNcISZk25cFs6ED2e5LSVfy 4F4Lb3JnXUHt2XxLp5wlRFNj5kgzbPVDHlnTjFTM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404842AbgFSPfy (ORCPT ); Fri, 19 Jun 2020 11:35:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:35350 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393812AbgFSPbU (ORCPT ); Fri, 19 Jun 2020 11:31:20 -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 262E52166E; Fri, 19 Jun 2020 15:31:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592580679; bh=THVtaWUnXGtkXiUpMl98ezwe7oGbMPmTprpCeiVDeSk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uBXco2l95FCrWMmx7GaN1Pa/qEwDZRYP+BKzV+VblnO5+B8sVxuEIwvxJjaIXJgN6 yeWtSC9v6ZzAYjuL7BwJzdnArp3vvt5UTdz33zwNeaPRMUzjk2wtUrqncibhSz5g// uwWq5rEr3fjxRIpzt9x/+O9I38xvwl3LQqV7p4jU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe Leroy , Michael Ellerman Subject: [PATCH 5.7 340/376] powerpc/kasan: Fix shadow pages allocation failure Date: Fri, 19 Jun 2020 16:34:18 +0200 Message-Id: <20200619141726.427515605@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141710.350494719@linuxfoundation.org> References: <20200619141710.350494719@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe Leroy commit d2a91cef9bbdeb87b7449fdab1a6be6000930210 upstream. Doing kasan pages allocation in MMU_init is too early, kernel doesn't have access yet to the entire memory space and memblock_alloc() fails when the kernel is a bit big. Do it from kasan_init() instead. Fixes: 2edb16efc899 ("powerpc/32: Add KASAN support") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/c24163ee5d5f8cdf52fefa45055ceb35435b8f15.1589866984.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/include/asm/kasan.h | 2 -- arch/powerpc/mm/init_32.c | 2 -- arch/powerpc/mm/kasan/kasan_init_32.c | 4 +++- 3 files changed, 3 insertions(+), 5 deletions(-) --- a/arch/powerpc/include/asm/kasan.h +++ b/arch/powerpc/include/asm/kasan.h @@ -27,12 +27,10 @@ #ifdef CONFIG_KASAN void kasan_early_init(void); -void kasan_mmu_init(void); void kasan_init(void); void kasan_late_init(void); #else static inline void kasan_init(void) { } -static inline void kasan_mmu_init(void) { } static inline void kasan_late_init(void) { } #endif --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -170,8 +170,6 @@ void __init MMU_init(void) btext_unmap(); #endif - kasan_mmu_init(); - setup_kup(); /* Shortly after that, the entire linear mapping will be available */ --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -132,7 +132,7 @@ static void __init kasan_unmap_early_sha flush_tlb_kernel_range(k_start, k_end); } -void __init kasan_mmu_init(void) +static void __init kasan_mmu_init(void) { int ret; struct memblock_region *reg; @@ -160,6 +160,8 @@ void __init kasan_mmu_init(void) void __init kasan_init(void) { + kasan_mmu_init(); + kasan_remap_early_shadow_ro(); clear_page(kasan_early_shadow_page);