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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF1C9C433F5 for ; Wed, 27 Apr 2022 10:47:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230242AbiD0Kuk (ORCPT ); Wed, 27 Apr 2022 06:50:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229999AbiD0KuH (ORCPT ); Wed, 27 Apr 2022 06:50:07 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 282ED36A647 for ; Wed, 27 Apr 2022 03:20:53 -0700 (PDT) X-UUID: 3e1c3739de0b45bd9e456dfe0070ed7c-20220427 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.4,REQID:e6ff2951-49ff-4921-a4da-7f6959bb91d0,OB:20,L OB:0,IP:0,URL:0,TC:0,Content:-20,EDM:0,RT:0,SF:95,FILE:0,RULE:Release_Ham, ACTION:release,TS:75 X-CID-INFO: VERSION:1.1.4,REQID:e6ff2951-49ff-4921-a4da-7f6959bb91d0,OB:20,LOB :0,IP:0,URL:0,TC:0,Content:-20,EDM:0,RT:0,SF:95,FILE:0,RULE:Spam_GS981B3D, ACTION:quarantine,TS:75 X-CID-META: VersionHash:faefae9,CLOUDID:975bacc6-85ee-4ac1-ac05-bd3f1e72e732,C OID:055001bf033d,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,File:nil ,QS:0,BEC:nil X-UUID: 3e1c3739de0b45bd9e456dfe0070ed7c-20220427 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1732903374; Wed, 27 Apr 2022 17:59:36 +0800 Received: from mtkexhb02.mediatek.inc (172.21.101.103) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Wed, 27 Apr 2022 17:59:34 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkexhb02.mediatek.inc (172.21.101.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 27 Apr 2022 17:59:32 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 27 Apr 2022 17:59:32 +0800 From: Lecopzer Chen To: , CC: , , , , , , , , , , , , , , , , , Subject: [PATCH v5 1/2] arm: kasan: support CONFIG_KASAN_VMALLOC Date: Wed, 27 Apr 2022 17:59:15 +0800 Message-ID: <20220427095916.17515-2-lecopzer.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220427095916.17515-1-lecopzer.chen@mediatek.com> References: <20220427095916.17515-1-lecopzer.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Simply make shadow of vmalloc area mapped on demand. Since the virtual address of vmalloc for Arm is also between MODULE_VADDR and 0x100000000 (ZONE_HIGHMEM), which means the shadow address has already included between KASAN_SHADOW_START and KASAN_SHADOW_END. Thus we need to change nothing for memory map of Arm. This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem and support CONFIG_VMAP_STACK with KASan. Signed-off-by: Lecopzer Chen Tested-by: Linus Walleij Reviewed-by: Linus Walleij --- arch/arm/Kconfig | 1 + arch/arm/mm/kasan_init.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2e8091e2d8a8..f440cf59cea1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -75,6 +75,7 @@ config ARM select HAVE_ARCH_KFENCE if MMU && !XIP_KERNEL select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL + select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_PFN_VALID select HAVE_ARCH_SECCOMP diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index 5ad0d6c56d56..29caee9c79ce 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -236,7 +236,11 @@ void __init kasan_init(void) clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END); - kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + kasan_mem_to_shadow((void *)VMALLOC_END)); + + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_END), kasan_mem_to_shadow((void *)-1UL) + 1); for_each_mem_range(i, &pa_start, &pa_end) { -- 2.18.0