From patchwork Thu Dec 30 19:12:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: andrey.konovalov@linux.dev X-Patchwork-Id: 12701612 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59094C433FE for ; Thu, 30 Dec 2021 19:13:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DD07E6B009E; Thu, 30 Dec 2021 14:13:42 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D59DB6B009F; Thu, 30 Dec 2021 14:13:42 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BFA456B00A0; Thu, 30 Dec 2021 14:13:42 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0236.hostedemail.com [216.40.44.236]) by kanga.kvack.org (Postfix) with ESMTP id ACA636B009E for ; Thu, 30 Dec 2021 14:13:42 -0500 (EST) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 719F68955D for ; Thu, 30 Dec 2021 19:13:42 +0000 (UTC) X-FDA: 78975409884.10.BF9950D Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by imf24.hostedemail.com (Postfix) with ESMTP id 5CCE4180002 for ; Thu, 30 Dec 2021 19:13:35 +0000 (UTC) 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=1640891621; 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=Kp+2Q3QLxWnCUmTGCUqJeVTafIKYNKQMJyZMylxx2h8=; b=Fdr1CYMBvtePxKkbsUTaaA8g5VeJvZovcMZtFSDwjjRps7/VvTpe2f+HTIYgIzZ7qiRpKQ /MRO3AZz/Ti4DI1FYDScOtT1OxRtf2Yz7c42XlPYMoUopr/e/nJafl9LFAsSexCJTZAXG4 qCyx0dC5VEPIbQ5jjfmLThK7YCoxQ5Y= From: andrey.konovalov@linux.dev To: Andrew Morton Cc: Andrey Konovalov , Marco Elver , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, linux-mm@kvack.org, Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Peter Collingbourne , Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH mm v5 16/39] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS Date: Thu, 30 Dec 2021 20:12:18 +0100 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Fdr1CYMB; spf=pass (imf24.hostedemail.com: domain of andrey.konovalov@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 5CCE4180002 X-Stat-Signature: crfw66zhuphfdx7q8nwe9ay959w9gx7e X-HE-Tag: 1640891615-646243 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Reviewed-by: Alexander Potapenko --- 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 952cd6f9ca46..020f3e57a03f 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