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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 07306C388F9 for ; Thu, 22 Oct 2020 13:20:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96BAB222E9 for ; Thu, 22 Oct 2020 13:20:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="T8XkZLbo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2899713AbgJVNUV (ORCPT ); Thu, 22 Oct 2020 09:20:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2899458AbgJVNUD (ORCPT ); Thu, 22 Oct 2020 09:20:03 -0400 Received: from mail-wr1-x44a.google.com (mail-wr1-x44a.google.com [IPv6:2a00:1450:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C06CDC0613CF for ; Thu, 22 Oct 2020 06:20:01 -0700 (PDT) Received: by mail-wr1-x44a.google.com with SMTP id 47so611098wrc.19 for ; Thu, 22 Oct 2020 06:20:01 -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=RAUHacgq2cb8MVx0OL/jnsTS0+3Q5wxOMCs5kif8wrA=; b=T8XkZLboTUX2NyOYysgmKUiNk47jsUn1qeJWg7MIIbqEAd+73paV8PYdNWZo6nu+Cc k9/ygi18x5EwM1VIUVKq5F4L9UNaIvDN3+40sUuBBRSvoUtzSR5IniG++gYkSVhaZp2v 9ndLX9Tm15qJSy9ca1BvuJPmgCv28b8wlEXO8TC1/7YcSPn7/i5fq7mdUnRrrntcQ1d7 vZ4nDjVe8UoLw7sFNS3oyvqYr3Fh3XDMi1YkYK0+XaSl85rXlSl4WeS9f4yriHXPV27b PaHUtpGmenEDBXLWwpDQgNQ4ZGkUDbAkYai9f0cMqqPeTkzCasYSwQuBGOyoAPpBUkV3 fiMQ== 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=RAUHacgq2cb8MVx0OL/jnsTS0+3Q5wxOMCs5kif8wrA=; b=e9qFQb1vKGhQxuPJW+xnhNpML14AWJbFnPVCo3/OQP70r9ES+QMXH96i2Osi/Eao15 jM8nP9ewEkCMl3B0bOjSCyDvz/bWELc3ewkYyM97/hzAFMdgmjFvnSxvy/BUSsKHQIyY SUZRhd9+jo2dgeDEon98TWzcDmBbBgAfsO7bNYatp5qKZE/2+agcOepxjb5lxPTmSE4m BBSeBzkUxNAzq5EuU7bnavd5y43nvF4jb+zMbiJCbwn8ePrVY2BpnqVWLH1QmfLHg2G3 QsCMzjEtNeFzIJQCBPga+0UxQOP/RonQHruFNup16lIMbN9SghmcMCtPxedVST2ZvOZZ gy/A== X-Gm-Message-State: AOAM530vtx0Rf1DUXavBfW1U4GilF/8cCqhwuv+dLR3KK2CVAh6HpafU PXY6Og5TNfzG2F0ctIIOe6V988hyhcKMiKFV X-Google-Smtp-Source: ABdhPJybl2hZjVJhVj+u6ji4X1587kqW3ZlYy5FlGcVnGVLNVb1giLbLOy6rElUKlVmUuT7L3Y0Fqzr5L6ftaY9F Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a1c:7707:: with SMTP id t7mr2703228wmi.54.1603372800484; Thu, 22 Oct 2020 06:20:00 -0700 (PDT) Date: Thu, 22 Oct 2020 15:19:07 +0200 In-Reply-To: Message-Id: <21fa5f4eb6ee132a57b716ff6245f2c98de2d204.1603372719.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.0.rc1.297.gfa9743e501-goog Subject: [PATCH RFC v2 15/21] kasan: check kasan_enabled in annotations From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver Cc: Evgenii Stepanov , Kostya Serebryany , Peter Collingbourne , Serban Constantinescu , Andrey Ryabinin , Elena Petrova , 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" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Declare the kasan_enabled static key in include/linux/kasan.h and in include/linux/mm.h and check it in all kasan annotations. This allows to avoid any slowdown caused by function calls when kasan_enabled is disabled. Signed-off-by: Andrey Konovalov Link: https://linux-review.googlesource.com/id/I2589451d3c96c97abbcbf714baabe6161c6f153e --- include/linux/kasan.h | 210 ++++++++++++++++++++++++++++++++---------- include/linux/mm.h | 27 ++++-- mm/kasan/common.c | 60 ++++++------ 3 files changed, 211 insertions(+), 86 deletions(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 2b9023224474..8654275aa62e 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -2,6 +2,7 @@ #ifndef _LINUX_KASAN_H #define _LINUX_KASAN_H +#include #include struct kmem_cache; @@ -66,40 +67,154 @@ static inline void kasan_disable_current(void) {} #ifdef CONFIG_KASAN -void kasan_alloc_pages(struct page *page, unsigned int order); -void kasan_free_pages(struct page *page, unsigned int order); +struct kasan_cache { + int alloc_meta_offset; + int free_meta_offset; +}; + +#ifdef CONFIG_KASAN_HW_TAGS +DECLARE_STATIC_KEY_FALSE(kasan_enabled); +#else +DECLARE_STATIC_KEY_TRUE(kasan_enabled); +#endif -void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, - slab_flags_t *flags); +void __kasan_alloc_pages(struct page *page, unsigned int order); +static inline void kasan_alloc_pages(struct page *page, unsigned int order) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_alloc_pages(page, order); +} -void kasan_unpoison_data(const void *address, size_t size); -void kasan_unpoison_slab(const void *ptr); +void __kasan_free_pages(struct page *page, unsigned int order); +static inline void kasan_free_pages(struct page *page, unsigned int order) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_free_pages(page, order); +} -void kasan_poison_slab(struct page *page); -void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); -void kasan_poison_object_data(struct kmem_cache *cache, void *object); -void * __must_check kasan_init_slab_obj(struct kmem_cache *cache, - const void *object); +void __kasan_cache_create(struct kmem_cache *cache, unsigned int *size, + slab_flags_t *flags); +static inline void kasan_cache_create(struct kmem_cache *cache, + unsigned int *size, slab_flags_t *flags) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_cache_create(cache, size, flags); +} -void * __must_check kasan_kmalloc_large(const void *ptr, size_t size, - gfp_t flags); -void kasan_kfree_large(void *ptr, unsigned long ip); -void kasan_poison_kfree(void *ptr, unsigned long ip); -void * __must_check kasan_kmalloc(struct kmem_cache *s, const void *object, - size_t size, gfp_t flags); -void * __must_check kasan_krealloc(const void *object, size_t new_size, - gfp_t flags); +size_t __kasan_metadata_size(struct kmem_cache *cache); +static inline size_t kasan_metadata_size(struct kmem_cache *cache) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_metadata_size(cache); + return 0; +} -void * __must_check kasan_slab_alloc(struct kmem_cache *s, void *object, - gfp_t flags); -bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip); +void __kasan_unpoison_data(const void *addr, size_t size); +static inline void kasan_unpoison_data(const void *addr, size_t size) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_unpoison_data(addr, size); +} -struct kasan_cache { - int alloc_meta_offset; - int free_meta_offset; -}; +void __kasan_unpoison_slab(const void *ptr); +static inline void kasan_unpoison_slab(const void *ptr) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_unpoison_slab(ptr); +} + +void __kasan_poison_slab(struct page *page); +static inline void kasan_poison_slab(struct page *page) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_poison_slab(page); +} + +void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object); +static inline void kasan_unpoison_object_data(struct kmem_cache *cache, void *object) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_unpoison_object_data(cache, object); +} + +void __kasan_poison_object_data(struct kmem_cache *cache, void *object); +static inline void kasan_poison_object_data(struct kmem_cache *cache, void *object) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_poison_object_data(cache, object); +} + +void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache, + const void *object); +static inline void * __must_check kasan_init_slab_obj(struct kmem_cache *cache, + const void *object) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_init_slab_obj(cache, object); + return (void *)object; +} + +bool __kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip); +static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_slab_free(s, object, ip); + return false; +} -size_t kasan_metadata_size(struct kmem_cache *cache); +void * __must_check __kasan_slab_alloc(struct kmem_cache *s, + void *object, gfp_t flags); +static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s, + void *object, gfp_t flags) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_slab_alloc(s, object, flags); + return object; +} + +void * __must_check __kasan_kmalloc(struct kmem_cache *s, const void *object, + size_t size, gfp_t flags); +static inline void * __must_check kasan_kmalloc(struct kmem_cache *s, const void *object, + size_t size, gfp_t flags) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_kmalloc(s, object, size, flags); + return (void *)object; +} + +void * __must_check __kasan_kmalloc_large(const void *ptr, + size_t size, gfp_t flags); +static inline void * __must_check kasan_kmalloc_large(const void *ptr, + size_t size, gfp_t flags) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_kmalloc_large(ptr, size, flags); + return (void *)ptr; +} + +void * __must_check __kasan_krealloc(const void *object, + size_t new_size, gfp_t flags); +static inline void * __must_check kasan_krealloc(const void *object, + size_t new_size, gfp_t flags) +{ + if (static_branch_likely(&kasan_enabled)) + return __kasan_krealloc(object, new_size, flags); + return (void *)object; +} + +void __kasan_poison_kfree(void *ptr, unsigned long ip); +static inline void kasan_poison_kfree(void *ptr, unsigned long ip) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_poison_kfree(ptr, ip); +} + +void __kasan_kfree_large(void *ptr, unsigned long ip); +static inline void kasan_kfree_large(void *ptr, unsigned long ip) +{ + if (static_branch_likely(&kasan_enabled)) + __kasan_kfree_large(ptr, ip); +} bool kasan_save_enable_multi_shot(void); void kasan_restore_multi_shot(bool enabled); @@ -108,14 +223,12 @@ void kasan_restore_multi_shot(bool enabled); static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} static inline void kasan_free_pages(struct page *page, unsigned int order) {} - static inline void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, slab_flags_t *flags) {} - -static inline void kasan_unpoison_data(const void *address, size_t size) { } -static inline void kasan_unpoison_slab(const void *ptr) { } - +static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } +static inline void kasan_unpoison_data(const void *address, size_t size) {} +static inline void kasan_unpoison_slab(const void *ptr) {} static inline void kasan_poison_slab(struct page *page) {} static inline void kasan_unpoison_object_data(struct kmem_cache *cache, void *object) {} @@ -126,36 +239,33 @@ static inline void *kasan_init_slab_obj(struct kmem_cache *cache, { return (void *)object; } - -static inline void *kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) +static inline bool kasan_slab_free(struct kmem_cache *s, void *object, + unsigned long ip) { - return ptr; + return false; } -static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} -static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {} -static inline void *kasan_kmalloc(struct kmem_cache *s, const void *object, - size_t size, gfp_t flags) +static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object, + gfp_t flags) { - return (void *)object; + return object; } -static inline void *kasan_krealloc(const void *object, size_t new_size, - gfp_t flags) +static inline void *kasan_kmalloc(struct kmem_cache *s, const void *object, + size_t size, gfp_t flags) { return (void *)object; } -static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object, - gfp_t flags) +static inline void *kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags) { - return object; + return (void *)ptr; } -static inline bool kasan_slab_free(struct kmem_cache *s, void *object, - unsigned long ip) +static inline void *kasan_krealloc(const void *object, size_t new_size, + gfp_t flags) { - return false; + return (void *)object; } - -static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } +static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {} +static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} #endif /* CONFIG_KASAN */ diff --git a/include/linux/mm.h b/include/linux/mm.h index a3cac68c737c..701e9d7666d6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1412,22 +1412,36 @@ static inline bool cpupid_match_pid(struct task_struct *task, int cpupid) #endif /* CONFIG_NUMA_BALANCING */ #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) + +#ifdef CONFIG_KASAN_HW_TAGS +DECLARE_STATIC_KEY_FALSE(kasan_enabled); +#else +DECLARE_STATIC_KEY_TRUE(kasan_enabled); +#endif + static inline u8 page_kasan_tag(const struct page *page) { - return (page->flags >> KASAN_TAG_PGSHIFT) & KASAN_TAG_MASK; + if (static_branch_likely(&kasan_enabled)) + return (page->flags >> KASAN_TAG_PGSHIFT) & KASAN_TAG_MASK; + return 0xff; } static inline void page_kasan_tag_set(struct page *page, u8 tag) { - page->flags &= ~(KASAN_TAG_MASK << KASAN_TAG_PGSHIFT); - page->flags |= (tag & KASAN_TAG_MASK) << KASAN_TAG_PGSHIFT; + if (static_branch_likely(&kasan_enabled)) { + page->flags &= ~(KASAN_TAG_MASK << KASAN_TAG_PGSHIFT); + page->flags |= (tag & KASAN_TAG_MASK) << KASAN_TAG_PGSHIFT; + } } static inline void page_kasan_tag_reset(struct page *page) { - page_kasan_tag_set(page, 0xff); + if (static_branch_likely(&kasan_enabled)) + page_kasan_tag_set(page, 0xff); } -#else + +#else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ + static inline u8 page_kasan_tag(const struct page *page) { return 0xff; @@ -1435,7 +1449,8 @@ static inline u8 page_kasan_tag(const struct page *page) static inline void page_kasan_tag_set(struct page *page, u8 tag) { } static inline void page_kasan_tag_reset(struct page *page) { } -#endif + +#endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ static inline struct zone *page_zone(const struct page *page) { diff --git a/mm/kasan/common.c b/mm/kasan/common.c index cc129ef62ab1..c5ec60e1a4d2 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -81,7 +81,7 @@ asmlinkage void kasan_unpoison_task_stack_below(const void *watermark) } #endif /* CONFIG_KASAN_STACK */ -void kasan_alloc_pages(struct page *page, unsigned int order) +void __kasan_alloc_pages(struct page *page, unsigned int order) { u8 tag; unsigned long i; @@ -95,7 +95,7 @@ void kasan_alloc_pages(struct page *page, unsigned int order) kasan_unpoison_memory(page_address(page), PAGE_SIZE << order); } -void kasan_free_pages(struct page *page, unsigned int order) +void __kasan_free_pages(struct page *page, unsigned int order) { if (likely(!PageHighMem(page))) kasan_poison_memory(page_address(page), @@ -122,8 +122,8 @@ static inline unsigned int optimal_redzone(unsigned int object_size) object_size <= (1 << 16) - 1024 ? 1024 : 2048; } -void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, - slab_flags_t *flags) +void __kasan_cache_create(struct kmem_cache *cache, unsigned int *size, + slab_flags_t *flags) { unsigned int orig_size = *size; unsigned int redzone_size; @@ -165,7 +165,7 @@ void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, *flags |= SLAB_KASAN; } -size_t kasan_metadata_size(struct kmem_cache *cache) +size_t __kasan_metadata_size(struct kmem_cache *cache) { if (static_branch_unlikely(&kasan_stack)) return (cache->kasan_info.alloc_meta_offset ? @@ -188,17 +188,17 @@ struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache, return (void *)reset_tag(object) + cache->kasan_info.free_meta_offset; } -void kasan_unpoison_data(const void *address, size_t size) +void __kasan_unpoison_data(const void *addr, size_t size) { - kasan_unpoison_memory(address, size); + kasan_unpoison_memory(addr, size); } -void kasan_unpoison_slab(const void *ptr) +void __kasan_unpoison_slab(const void *ptr) { kasan_unpoison_memory(ptr, __ksize(ptr)); } -void kasan_poison_slab(struct page *page) +void __kasan_poison_slab(struct page *page) { unsigned long i; @@ -208,12 +208,12 @@ void kasan_poison_slab(struct page *page) KASAN_KMALLOC_REDZONE); } -void kasan_unpoison_object_data(struct kmem_cache *cache, void *object) +void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object) { kasan_unpoison_memory(object, cache->object_size); } -void kasan_poison_object_data(struct kmem_cache *cache, void *object) +void __kasan_poison_object_data(struct kmem_cache *cache, void *object) { kasan_poison_memory(object, round_up(cache->object_size, KASAN_GRANULE_SIZE), @@ -266,7 +266,7 @@ static u8 assign_tag(struct kmem_cache *cache, const void *object, #endif } -void * __must_check kasan_init_slab_obj(struct kmem_cache *cache, +void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache, const void *object) { struct kasan_alloc_meta *alloc_meta; @@ -285,7 +285,7 @@ void * __must_check kasan_init_slab_obj(struct kmem_cache *cache, return (void *)object; } -static bool __kasan_slab_free(struct kmem_cache *cache, void *object, +static bool ____kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip, bool quarantine) { u8 tag; @@ -329,9 +329,9 @@ static bool __kasan_slab_free(struct kmem_cache *cache, void *object, return false; } -bool kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip) +bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip) { - return __kasan_slab_free(cache, object, ip, true); + return ____kasan_slab_free(cache, object, ip, true); } static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags) @@ -339,7 +339,7 @@ static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags) kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags); } -static void *__kasan_kmalloc(struct kmem_cache *cache, const void *object, +static void *____kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size, gfp_t flags, bool keep_tag) { unsigned long redzone_start; @@ -371,20 +371,20 @@ static void *__kasan_kmalloc(struct kmem_cache *cache, const void *object, return set_tag(object, tag); } -void * __must_check kasan_slab_alloc(struct kmem_cache *cache, void *object, - gfp_t flags) +void * __must_check __kasan_slab_alloc(struct kmem_cache *cache, + void *object, gfp_t flags) { - return __kasan_kmalloc(cache, object, cache->object_size, flags, false); + return ____kasan_kmalloc(cache, object, cache->object_size, flags, false); } -void * __must_check kasan_kmalloc(struct kmem_cache *cache, const void *object, - size_t size, gfp_t flags) +void * __must_check __kasan_kmalloc(struct kmem_cache *cache, const void *object, + size_t size, gfp_t flags) { - return __kasan_kmalloc(cache, object, size, flags, true); + return ____kasan_kmalloc(cache, object, size, flags, true); } -EXPORT_SYMBOL(kasan_kmalloc); +EXPORT_SYMBOL(__kasan_kmalloc); -void * __must_check kasan_kmalloc_large(const void *ptr, size_t size, +void * __must_check __kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags) { struct page *page; @@ -409,7 +409,7 @@ void * __must_check kasan_kmalloc_large(const void *ptr, size_t size, return (void *)ptr; } -void * __must_check kasan_krealloc(const void *object, size_t size, gfp_t flags) +void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flags) { struct page *page; @@ -419,13 +419,13 @@ void * __must_check kasan_krealloc(const void *object, size_t size, gfp_t flags) page = virt_to_head_page(object); if (unlikely(!PageSlab(page))) - return kasan_kmalloc_large(object, size, flags); + return __kasan_kmalloc_large(object, size, flags); else - return __kasan_kmalloc(page->slab_cache, object, size, + return ____kasan_kmalloc(page->slab_cache, object, size, flags, true); } -void kasan_poison_kfree(void *ptr, unsigned long ip) +void __kasan_poison_kfree(void *ptr, unsigned long ip) { struct page *page; @@ -438,11 +438,11 @@ void kasan_poison_kfree(void *ptr, unsigned long ip) } kasan_poison_memory(ptr, page_size(page), KASAN_FREE_PAGE); } else { - __kasan_slab_free(page->slab_cache, ptr, ip, false); + ____kasan_slab_free(page->slab_cache, ptr, ip, false); } } -void kasan_kfree_large(void *ptr, unsigned long ip) +void __kasan_kfree_large(void *ptr, unsigned long ip) { if (ptr != page_address(virt_to_head_page(ptr))) kasan_report_invalid_free(ptr, ip); -- 2.29.0.rc1.297.gfa9743e501-goog