From patchwork Mon May 9 15:51:36 2022 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: 12843817 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 3CDD4C4332F for ; Mon, 9 May 2022 15:51:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A7C038D0001; Mon, 9 May 2022 11:51:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A00A26B0075; Mon, 9 May 2022 11:51:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 851748D0001; Mon, 9 May 2022 11:51:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 7193F6B0074 for ; Mon, 9 May 2022 11:51:45 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 4D0A22086A for ; Mon, 9 May 2022 15:51:45 +0000 (UTC) X-FDA: 79446644970.25.5AC2AE1 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf14.hostedemail.com (Postfix) with ESMTP id 895D6100094 for ; Mon, 9 May 2022 15:51:42 +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=1652111503; 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=cdChAqh9Z1Z7THY7s/iFk3WWip4uaed5XjcYAp3h5fU=; b=r755JKWNBGsueymij3j5+7Y+YW5Gp9glsQWky2Gh4qo2euPzhl+iZyoqVOTDd5+sq6fWX2 T8a3jRwZ9ZDrdIhIvuCADabJ++CpP99tgjZgNZoSSnXvy+bNTe0hSU5KlSfvc30LjaFnpn 96xKsXTVXXgnrcY8uHky58sPLCGe6Gg= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v2 3/3] kasan: give better names to shadow values Date: Mon, 9 May 2022 17:51:36 +0200 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 895D6100094 X-Stat-Signature: 3n4i78i8bqp9eptjxczwfpffkooauwqg X-Rspam-User: Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=r755JKWN; spf=pass (imf14.hostedemail.com: domain of andrey.konovalov@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-HE-Tag: 1652111502-554919 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 Rename KASAN_KMALLOC_* shadow values to KASAN_SLAB_*, as they are used for all slab allocations, not only for kmalloc. Also rename KASAN_FREE_PAGE to KASAN_PAGE_FREE to be consistent with KASAN_PAGE_REDZONE and KASAN_SLAB_FREE. Reviewed-by: Alexander Potapenko Signed-off-by: Andrey Konovalov --- mm/kasan/common.c | 12 ++++++------ mm/kasan/generic.c | 6 +++--- mm/kasan/kasan.h | 14 +++++++------- mm/kasan/quarantine.c | 2 +- mm/kasan/report_generic.c | 8 ++++---- 5 files changed, 21 insertions(+), 21 deletions(-) diff --git a/mm/kasan/common.c b/mm/kasan/common.c index d9079ec11f31..c40c0e7b3b5f 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -117,7 +117,7 @@ void __kasan_poison_pages(struct page *page, unsigned int order, bool init) { if (likely(!PageHighMem(page))) kasan_poison(page_address(page), PAGE_SIZE << order, - KASAN_FREE_PAGE, init); + KASAN_PAGE_FREE, init); } /* @@ -254,7 +254,7 @@ void __kasan_poison_slab(struct slab *slab) for (i = 0; i < compound_nr(page); i++) page_kasan_tag_reset(page + i); kasan_poison(page_address(page), page_size(page), - KASAN_KMALLOC_REDZONE, false); + KASAN_SLAB_REDZONE, false); } void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object) @@ -265,7 +265,7 @@ void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object) void __kasan_poison_object_data(struct kmem_cache *cache, void *object) { kasan_poison(object, round_up(cache->object_size, KASAN_GRANULE_SIZE), - KASAN_KMALLOC_REDZONE, false); + KASAN_SLAB_REDZONE, false); } /* @@ -357,7 +357,7 @@ static inline bool ____kasan_slab_free(struct kmem_cache *cache, void *object, } kasan_poison(object, round_up(cache->object_size, KASAN_GRANULE_SIZE), - KASAN_KMALLOC_FREE, init); + KASAN_SLAB_FREE, init); if ((IS_ENABLED(CONFIG_KASAN_GENERIC) && !quarantine)) return false; @@ -414,7 +414,7 @@ void __kasan_slab_free_mempool(void *ptr, unsigned long ip) if (unlikely(!folio_test_slab(folio))) { if (____kasan_kfree_large(ptr, ip)) return; - kasan_poison(ptr, folio_size(folio), KASAN_FREE_PAGE, false); + kasan_poison(ptr, folio_size(folio), KASAN_PAGE_FREE, false); } else { struct slab *slab = folio_slab(folio); @@ -505,7 +505,7 @@ static inline void *____kasan_kmalloc(struct kmem_cache *cache, redzone_end = round_up((unsigned long)(object + cache->object_size), KASAN_GRANULE_SIZE); kasan_poison((void *)redzone_start, redzone_end - redzone_start, - KASAN_KMALLOC_REDZONE, false); + KASAN_SLAB_REDZONE, false); /* * Save alloc info (if possible) for kmalloc() allocations. diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index a25ad4090615..437fcc7e77cf 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -369,14 +369,14 @@ void kasan_set_free_info(struct kmem_cache *cache, kasan_set_track(&free_meta->free_track, GFP_NOWAIT); /* The object was freed and has free track set. */ - *(u8 *)kasan_mem_to_shadow(object) = KASAN_KMALLOC_FREETRACK; + *(u8 *)kasan_mem_to_shadow(object) = KASAN_SLAB_FREETRACK; } struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, void *object, u8 tag) { - if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_KMALLOC_FREETRACK) + if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_SLAB_FREETRACK) return NULL; - /* Free meta must be present with KASAN_KMALLOC_FREETRACK. */ + /* Free meta must be present with KASAN_SLAB_FREETRACK. */ return &kasan_get_free_meta(cache, object)->free_track; } diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index a60ed636e899..610d60d6e5b8 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -74,22 +74,22 @@ static inline bool kasan_sync_fault_possible(void) #define KASAN_MEMORY_PER_SHADOW_PAGE (KASAN_GRANULE_SIZE << PAGE_SHIFT) #ifdef CONFIG_KASAN_GENERIC -#define KASAN_FREE_PAGE 0xFF /* freed page */ +#define KASAN_PAGE_FREE 0xFF /* freed page */ #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocation */ -#define KASAN_KMALLOC_REDZONE 0xFC /* redzone for slab object */ -#define KASAN_KMALLOC_FREE 0xFB /* freed slab object */ +#define KASAN_SLAB_REDZONE 0xFC /* redzone for slab object */ +#define KASAN_SLAB_FREE 0xFB /* freed slab object */ #define KASAN_VMALLOC_INVALID 0xF8 /* inaccessible space in vmap area */ #else -#define KASAN_FREE_PAGE KASAN_TAG_INVALID +#define KASAN_PAGE_FREE 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_SLAB_REDZONE KASAN_TAG_INVALID +#define KASAN_SLAB_FREE KASAN_TAG_INVALID #define KASAN_VMALLOC_INVALID KASAN_TAG_INVALID /* only used for SW_TAGS */ #endif #ifdef CONFIG_KASAN_GENERIC -#define KASAN_KMALLOC_FREETRACK 0xFA /* freed slab object with free track */ +#define KASAN_SLAB_FREETRACK 0xFA /* freed slab object with free track */ #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ /* Stack redzone shadow values. Compiler ABI, do not change. */ diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c index 0a9def8ce5e8..fac4befb9ef2 100644 --- a/mm/kasan/quarantine.c +++ b/mm/kasan/quarantine.c @@ -152,7 +152,7 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache) * As the object now gets freed from the quarantine, assume that its * free track is no longer valid. */ - *(u8 *)kasan_mem_to_shadow(object) = KASAN_KMALLOC_FREE; + *(u8 *)kasan_mem_to_shadow(object) = KASAN_SLAB_FREE; ___cache_free(cache, object, _THIS_IP_); diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index efc5e79a103f..6689fb9a919b 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -66,7 +66,7 @@ static const char *get_shadow_bug_type(struct kasan_report_info *info) bug_type = "out-of-bounds"; break; case KASAN_PAGE_REDZONE: - case KASAN_KMALLOC_REDZONE: + case KASAN_SLAB_REDZONE: bug_type = "slab-out-of-bounds"; break; case KASAN_GLOBAL_REDZONE: @@ -78,9 +78,9 @@ static const char *get_shadow_bug_type(struct kasan_report_info *info) case KASAN_STACK_PARTIAL: bug_type = "stack-out-of-bounds"; break; - case KASAN_FREE_PAGE: - case KASAN_KMALLOC_FREE: - case KASAN_KMALLOC_FREETRACK: + case KASAN_PAGE_FREE: + case KASAN_SLAB_FREE: + case KASAN_SLAB_FREETRACK: bug_type = "use-after-free"; break; case KASAN_ALLOCA_LEFT: