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=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 0FD1FC63697 for ; Tue, 10 Nov 2020 22:11:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A965320637 for ; Tue, 10 Nov 2020 22:11:20 +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="dcDLFYUo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A965320637 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3D0736B0075; Tue, 10 Nov 2020 17:11:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 381B06B0078; Tue, 10 Nov 2020 17:11:20 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 26F336B007B; Tue, 10 Nov 2020 17:11:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0246.hostedemail.com [216.40.44.246]) by kanga.kvack.org (Postfix) with ESMTP id EBE0B6B0075 for ; Tue, 10 Nov 2020 17:11:19 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 8AE2E8249980 for ; Tue, 10 Nov 2020 22:11:19 +0000 (UTC) X-FDA: 77469905478.30.art94_070638d272f8 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 608D7180B3C8B for ; Tue, 10 Nov 2020 22:11:19 +0000 (UTC) X-HE-Tag: art94_070638d272f8 X-Filterd-Recvd-Size: 6889 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Tue, 10 Nov 2020 22:11:18 +0000 (UTC) Received: by mail-wr1-f74.google.com with SMTP id p16so3570929wrx.4 for ; Tue, 10 Nov 2020 14:11:18 -0800 (PST) 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=1eB/cLd20VDMIOf5D2uQuwyV0kwdvml7t6htObswIuI=; b=dcDLFYUo7ZWAl0w6Ap0g44WLGYOIxW8LfvFE7BVqEs3gAXemhCzpMkfI9vHDfCo5kW G6DfPNHDcMneHDBN1nxH1Eydjd/4oDloko4cSzC5V+MpBFyqz4pUyEnw4JEXd+wUFsDo yHlcQUTwruEFGKeILdN4qETaXVmG1nNvrrBMGhXjq0Btdua3oc8Tdl/uz0fb4xwF3464 fJGVAT98LJmWJ6K2H5kKNrU7pBoLcV+RjVC6O86jwQINLvUqahB2rJYRXbl6uTwBr/ev oygWQe2FPANJPDJBwoKLxN1pCMn1sAlyj3x7qYNiK5EQOmtNG52a6p9o948Ujd5O3Wue W9YA== 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=1eB/cLd20VDMIOf5D2uQuwyV0kwdvml7t6htObswIuI=; b=S34GEHswtPK8M9FORr93HTzt6mVV9KN0uNanzMx3rp/EdT2ukWy7Hica62uszfoDf/ MDjoARN13HAxpzbPm9Rqd+V1nPK5dOZ1rRzbLDNJajiMSJgJo+gZAFpvSVy4ZkT+/Cvb jcIf0Gcu1DHAtUwvbPrbL3zgCuKhHBcKst8Wy57OJXXWwHRAZ0V4tUZRGU/ouX6u8xv9 tjE5PrsrUw4a89hH5dMZP7p6LxfW9R8JEw+R0O53GkjXf2HbFklFxjOtm1ppCmFl+PyA GSuQc6xOdBuNKR+ROsejwcvswhyTgbS6c4jl7jC0j1vfA9lD9KsLSMVGv9mLXEUTfQRD iwOQ== X-Gm-Message-State: AOAM530LGNEifrPNE2k7EKUgK9L+4zseyz+Wy65nl9POxeDblWOEbMyf C/HdccnxGzYkQGuFykB0g7oRFaRLahkhbl8a X-Google-Smtp-Source: ABdhPJwNo9ObkSN2dMHiHZK/63eZNhZwi78i0Byk4gVJTBEP3w/ACtRfoFudjsbUvnKKRJmHq4ATBQVOooK1uHoj X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a1c:7303:: with SMTP id d3mr275192wmb.152.1605046277660; Tue, 10 Nov 2020 14:11:17 -0800 (PST) Date: Tue, 10 Nov 2020 23:10:02 +0100 In-Reply-To: Message-Id: <81fbf12c3455448b2bb4162dd9888d405ee0c00a.1605046192.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.2.222.g5d2a92d10f8-goog Subject: [PATCH v9 05/44] kasan: shadow declarations only for software modes From: Andrey Konovalov To: Catalin Marinas Cc: Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , Andrew Morton , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" 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: 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 Reviewed-by: Marco Elver --- Change-Id: I864be75a88b91b443c55e9c2042865e15703e164 --- include/linux/kasan.h | 47 ++++++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 16 deletions(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 59538e795df4..26f2ab92e7ca 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -11,7 +11,6 @@ struct task_struct; #ifdef CONFIG_KASAN -#include #include /* kasan_data struct is used in KUnit tests for KASAN expected failures */ @@ -20,6 +19,20 @@ struct kunit_kasan_expectation { bool report_found; }; +#endif + +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) + +#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]; extern pmd_t kasan_early_shadow_pmd[PTRS_PER_PMD]; @@ -35,6 +48,23 @@ 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); @@ -75,9 +105,6 @@ 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) { @@ -143,14 +170,6 @@ 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; } @@ -158,8 +177,6 @@ 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); @@ -174,8 +191,6 @@ 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); -- 2.29.2.222.g5d2a92d10f8-goog