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 AB998C433EF for ; Mon, 6 Dec 2021 21:46:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352794AbhLFVt0 (ORCPT ); Mon, 6 Dec 2021 16:49:26 -0500 Received: from out2.migadu.com ([188.165.223.204]:64455 "EHLO out2.migadu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352604AbhLFVtK (ORCPT ); Mon, 6 Dec 2021 16:49:10 -0500 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1638827139; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XbhL8TrmzwL9tq/+XeKdOp7BHc1RVFQ8fUYh+mFdIuI=; b=WPYCRHJuqRxj6DlRzMdcSwAHgTaV+gNwN4tmFLWsvKX36iTE2dLLFEmMBfSi7WM8u/dc/I G0AEdVM0xYRyE79yNt/C908Uv4g2g7h8YrRoxF1fsAbczLeWjRBi42PtQTgec3QCJlVJfp GpwRtgf2TOSJxW9AkLwt7vDAPMBb5k4= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko , Vincenzo Frascino , Catalin Marinas , Peter Collingbourne Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Andrew Morton , linux-mm@kvack.org, Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v2 16/34] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS Date: Mon, 6 Dec 2021 22:43:53 +0100 Message-Id: <599ecad2c26832e053a248737207cb1a1e4ed039.1638825394.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrey Konovalov In preparation for adding vmalloc support to SW_TAGS KASAN, provide a KASAN_VMALLOC_INVALID definition for it. HW_TAGS KASAN won't be using this value, as it falls back onto page_alloc for poisoning freed vmalloc() memory. Signed-off-by: Andrey Konovalov --- mm/kasan/kasan.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index a50450160638..0827d74d0d87 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -71,18 +71,19 @@ static inline bool kasan_sync_fault_possible(void) #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ #define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ #define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ +#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */ #else #define KASAN_FREE_PAGE KASAN_TAG_INVALID #define KASAN_PAGE_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_FREE KASAN_TAG_INVALID +#define KASAN_VMALLOC_INVALID KASAN_TAG_INVALID /* only for SW_TAGS */ #endif #ifdef CONFIG_KASAN_GENERIC #define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */ #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ -#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */ /* * Stack redzone shadow values -- 2.25.1