From patchwork Mon Jun 13 20:14:05 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: 12880081 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 4594ACCA480 for ; Mon, 13 Jun 2022 20:17:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B94FC8D01CE; Mon, 13 Jun 2022 16:17:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B1B158D01CC; Mon, 13 Jun 2022 16:17:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A0C438D01CE; Mon, 13 Jun 2022 16:17:36 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 6C9F78D01CC for ; Mon, 13 Jun 2022 16:17:36 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 36F33806A4 for ; Mon, 13 Jun 2022 20:17:36 +0000 (UTC) X-FDA: 79574322912.07.6D75DB4 Received: from out1.migadu.com (out1.migadu.com [91.121.223.63]) by imf17.hostedemail.com (Postfix) with ESMTP id BEFB240095 for ; Mon, 13 Jun 2022 20:17:35 +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=1655151454; 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=Pq3SVj2SILQniBWfHmFbw4zt5aRrCme3SaUMW3qAt2g=; b=me0bkbVmYmCzrLFlXtup0jhn6Pil4gvVnK0D2ckpBikr2kc/XBrruIv3MB8seUrHLIcyEX jCHxiIQvWilxxNnppnl2HriB39QLCrHPqwAa5ekVCtmCHndMmuPy38vmyqZ8DM+0atTEwj 7F6uJE25lzsWxTXIuVgpDpMm6tYv/qQ= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Peter Collingbourne , Evgenii Stepanov , Florian Mayer , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH 14/32] kasan: only define kasan_metadata_size for Generic mode Date: Mon, 13 Jun 2022 22:14:05 +0200 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655151455; a=rsa-sha256; cv=none; b=U/KkSK/ZJNdCk123vXpri5YhqdYfSS0ZaFwc/Q17E6ChC1UZM6vDMf4NSix4X8+eTlpeMz t7f6w0zBWJ9Dxk8jSgnwWEcdXV5vxq0YjKAWrOBsqNHxtqYeBbxzjjRB2GxP2J2t1Siw0G xKkG9FnjvTPSve8ELMtcvDFNDbih9UM= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=me0bkbVm; spf=pass (imf17.hostedemail.com: domain of andrey.konovalov@linux.dev designates 91.121.223.63 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655151455; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Pq3SVj2SILQniBWfHmFbw4zt5aRrCme3SaUMW3qAt2g=; b=vfD4hOB7LyNR+pl+7XwHcRDHABGaydxIoJT+AlsTW+Yljm1cbUObLrMiOdaRnq1+Vfl8yE AbRpr9bM23lBWlmbcLVv3g1Wm66k8bZ+PMwKUrg0kNn90Gg4m8scCb31SpqD0keTm3Hr24 ns2ZJJKCmrDS9kau90t1IvL7JhX4XLQ= X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: BEFB240095 X-Stat-Signature: dq3kntw4hdnhzeq8u1gj81pjfk1jey6b Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=me0bkbVm; spf=pass (imf17.hostedemail.com: domain of andrey.konovalov@linux.dev designates 91.121.223.63 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-HE-Tag: 1655151455-786362 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 KASAN provides a helper for calculating the size of per-object metadata stored in the redzone. As now only the Generic mode uses per-object metadata, only define kasan_metadata_size() for this mode. Signed-off-by: Andrey Konovalov --- include/linux/kasan.h | 17 ++++++++--------- mm/kasan/common.c | 11 ----------- mm/kasan/generic.c | 11 +++++++++++ 3 files changed, 19 insertions(+), 20 deletions(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index b092277bf48d..027df7599573 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -150,14 +150,6 @@ static __always_inline void kasan_cache_create_kmalloc(struct kmem_cache *cache) __kasan_cache_create_kmalloc(cache); } -size_t __kasan_metadata_size(struct kmem_cache *cache); -static __always_inline size_t kasan_metadata_size(struct kmem_cache *cache) -{ - if (kasan_enabled()) - return __kasan_metadata_size(cache); - return 0; -} - void __kasan_poison_slab(struct slab *slab); static __always_inline void kasan_poison_slab(struct slab *slab) { @@ -282,7 +274,6 @@ static inline void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, slab_flags_t *flags) {} static inline void kasan_cache_create_kmalloc(struct kmem_cache *cache) {} -static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } static inline void kasan_poison_slab(struct slab *slab) {} static inline void kasan_unpoison_object_data(struct kmem_cache *cache, void *object) {} @@ -333,6 +324,8 @@ static inline void kasan_unpoison_task_stack(struct task_struct *task) {} #ifdef CONFIG_KASAN_GENERIC +size_t kasan_metadata_size(struct kmem_cache *cache); + void kasan_cache_shrink(struct kmem_cache *cache); void kasan_cache_shutdown(struct kmem_cache *cache); void kasan_record_aux_stack(void *ptr); @@ -340,6 +333,12 @@ void kasan_record_aux_stack_noalloc(void *ptr); #else /* CONFIG_KASAN_GENERIC */ +/* Tag-based KASAN modes do not use per-object metadata. */ +static inline size_t kasan_metadata_size(struct kmem_cache *cache) +{ + return 0; +} + static inline void kasan_cache_shrink(struct kmem_cache *cache) {} static inline void kasan_cache_shutdown(struct kmem_cache *cache) {} static inline void kasan_record_aux_stack(void *ptr) {} diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 8a83ca9ad738..a0ddbf02aa6d 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -138,17 +138,6 @@ void __kasan_cache_create_kmalloc(struct kmem_cache *cache) cache->kasan_info.is_kmalloc = true; } -size_t __kasan_metadata_size(struct kmem_cache *cache) -{ - if (!kasan_requires_meta()) - return 0; - return (cache->kasan_info.alloc_meta_offset ? - sizeof(struct kasan_alloc_meta) : 0) + - ((cache->kasan_info.free_meta_offset && - cache->kasan_info.free_meta_offset != KASAN_NO_FREE_META) ? - sizeof(struct kasan_free_meta) : 0); -} - void __kasan_poison_slab(struct slab *slab) { struct page *page = slab_page(slab); diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index 5125fad76f70..806ab92032c3 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -427,6 +427,17 @@ void kasan_init_object_meta(struct kmem_cache *cache, const void *object) __memset(alloc_meta, 0, sizeof(*alloc_meta)); } +size_t kasan_metadata_size(struct kmem_cache *cache) +{ + if (!kasan_requires_meta()) + return 0; + return (cache->kasan_info.alloc_meta_offset ? + sizeof(struct kasan_alloc_meta) : 0) + + ((cache->kasan_info.free_meta_offset && + cache->kasan_info.free_meta_offset != KASAN_NO_FREE_META) ? + sizeof(struct kasan_free_meta) : 0); +} + static void __kasan_record_aux_stack(void *addr, bool can_alloc) { struct slab *slab = kasan_addr_to_slab(addr);