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=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 BB546C43461 for ; Tue, 15 Sep 2020 21:21:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C0F02078E for ; Tue, 15 Sep 2020 21:21:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="hMw9RQ1d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727990AbgIOVVI (ORCPT ); Tue, 15 Sep 2020 17:21:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728053AbgIOVQd (ORCPT ); Tue, 15 Sep 2020 17:16:33 -0400 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22DF8C06178B for ; Tue, 15 Sep 2020 14:16:31 -0700 (PDT) Received: by mail-qt1-x84a.google.com with SMTP id b18so4025475qto.4 for ; Tue, 15 Sep 2020 14:16:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=CRuZK+9yjNiKO3/D2O90q00ovcGW/0GaRtF/oaFCa6M=; b=hMw9RQ1dm2tX2wxDoS+iGFKc6VjnZ0XSq5Et2xcn9Si1ATKtqSzmGft3iR27ujVutM 6Pmv9Ouek8j/oMRKz9BmvZ7pHOYOe6Lqj7XAOJ+IVmxsC1pGbjA11jnsHJo+2P3BeD7U ssDvbd51P7yEcYy2VrkEPQOC1NGoueMpaJQ5NMWy/P26Q+4Eur2f8WwuoSAjAISHRjgs 4RFp88PAKRndNiG30G5JrdImqqcM8yXxseTQ3P3rk5mKHk51srzaCdnLOHyzHH11eFdB Z56rbIIDpE49gN6dYAIcfwB4B6ezKY9w/+af2eDNmCwV76JcqLbQzvBbSbEiYiI9oDjM YJVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=CRuZK+9yjNiKO3/D2O90q00ovcGW/0GaRtF/oaFCa6M=; b=DepTy027Ov3xZ1St4u5RMepmAy/jUynl4wihjKimX9O5BikuGP16qQnLyPPTO65Cit UVVDWvz/AHeLU9HbznzshqXhlzyWvGeYQ37s4ky69n8GvM1ZCWkCC1cNNZVvDcrcJmxR 2prir+1Mf3BiPwFkKMviHLqzod2Sdy9PNIwtlaOr6LeIULx8lJHH4qVyL6LZVhgNUzSR P/Gh9KstOgYqZnlXinci5dxasvcL+t92mTSQxnL7ywPdaLcB0Cv1yoEhBBoAosaFzoCS ZWyzeLk6iNq8hDtJnwG5qFgq1x63MLMZm+BuUD0TSbgEF/cBhFcTdVcGJPdMQnSamKdG ecjw== X-Gm-Message-State: AOAM532mbPlCeyQL1KNzH6RVSnV6fRqQa1Bv/eKD4/Pz8R1J5qSJIzJ5 gEmf2/bM/U0vA02DnHwMqEYZBBMDxpSzpQzv X-Google-Smtp-Source: ABdhPJyN5unj5rLtoXzfox4mXS2M3S/SaZl+8R1nGGjQ6/HS4oOUtG9N8+ab9YhNGQBGWUztUka8v9nB9tQGSTvy X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:ad4:4527:: with SMTP id l7mr20524343qvu.2.1600204589991; Tue, 15 Sep 2020 14:16:29 -0700 (PDT) Date: Tue, 15 Sep 2020 23:15:45 +0200 In-Reply-To: Message-Id: <6ad13f9f94e1a2f84f603e0e374582b89a44a75e.1600204505.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH v2 03/37] kasan: shadow declarations only for software modes From: Andrey Konovalov To: Dmitry Vyukov , Vincenzo Frascino , Catalin Marinas , kasan-dev@googlegroups.com Cc: Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. Group shadow-related KASAN function declarations and only define them for the two existing software modes. No functional changes for software modes. Signed-off-by: Andrey Konovalov Signed-off-by: Vincenzo Frascino --- Change-Id: I864be75a88b91b443c55e9c2042865e15703e164 --- include/linux/kasan.h | 44 ++++++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 17 deletions(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index bd5b4965a269..44a9aae44138 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -3,16 +3,24 @@ #define _LINUX_KASAN_H #include +#include struct kmem_cache; struct page; struct vm_struct; struct task_struct; -#ifdef CONFIG_KASAN +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) #include -#include + +/* Software KASAN implementations use shadow memory. */ + +#ifdef CONFIG_KASAN_SW_TAGS +#define KASAN_SHADOW_INIT 0xFF +#else +#define KASAN_SHADOW_INIT 0 +#endif extern unsigned char kasan_early_shadow_page[PAGE_SIZE]; extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE]; @@ -29,6 +37,23 @@ static inline void *kasan_mem_to_shadow(const void *addr) + KASAN_SHADOW_OFFSET; } +int kasan_add_zero_shadow(void *start, unsigned long size); +void kasan_remove_zero_shadow(void *start, unsigned long size); + +#else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ + +static inline int kasan_add_zero_shadow(void *start, unsigned long size) +{ + return 0; +} +static inline void kasan_remove_zero_shadow(void *start, + unsigned long size) +{} + +#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ + +#ifdef CONFIG_KASAN + /* Enable reporting bugs after kasan_disable_current() */ extern void kasan_enable_current(void); @@ -69,9 +94,6 @@ struct kasan_cache { int free_meta_offset; }; -int kasan_add_zero_shadow(void *start, unsigned long size); -void kasan_remove_zero_shadow(void *start, unsigned long size); - size_t __ksize(const void *); static inline void kasan_unpoison_slab(const void *ptr) { @@ -137,14 +159,6 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object, return false; } -static inline int kasan_add_zero_shadow(void *start, unsigned long size) -{ - return 0; -} -static inline void kasan_remove_zero_shadow(void *start, - unsigned long size) -{} - static inline void kasan_unpoison_slab(const void *ptr) { } static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } @@ -152,8 +166,6 @@ static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } #ifdef CONFIG_KASAN_GENERIC -#define KASAN_SHADOW_INIT 0 - void kasan_cache_shrink(struct kmem_cache *cache); void kasan_cache_shutdown(struct kmem_cache *cache); void kasan_record_aux_stack(void *ptr); @@ -168,8 +180,6 @@ static inline void kasan_record_aux_stack(void *ptr) {} #ifdef CONFIG_KASAN_SW_TAGS -#define KASAN_SHADOW_INIT 0xFF - void kasan_init_tags(void); void *kasan_reset_tag(const void *addr); -- 2.28.0.618.gf4bc123cb7-goog