From patchwork Thu Apr 28 16:21:50 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: 12830998 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 758AEC433F5 for ; Thu, 28 Apr 2022 16:22:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0D4F28D0003; Thu, 28 Apr 2022 12:22:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 023086B00C8; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C58318D0005; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.27]) by kanga.kvack.org (Postfix) with ESMTP id A736D6B00C6 for ; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 7F87A2AC9C for ; Thu, 28 Apr 2022 16:22:00 +0000 (UTC) X-FDA: 79406804400.07.41A99D1 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf22.hostedemail.com (Postfix) with ESMTP id 67FEDC0058 for ; Thu, 28 Apr 2022 16:21:58 +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=1651162915; 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; bh=cbOwwdKzIP/GSDsAkRZ0QuBwdx3oi7IvMcPM3Ptuuw8=; b=scASAs6/0AqVLS6ziYbW4E0ln5SrqzL6noGVkbxyUMmvJ4S75halbnS0PTPlF3MgXQb38h M5FWvrAShH0gZSsCp3y5pfjG08KzArs/uKNEJ+CGpxxuFuvqNLsegIUI9pGSFVVr8F7hvz jzXqJELhG1/eTXzUrcwBtvuJ5xyM/OM= 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 1/3] kasan: clean up comments in internal kasan.h Date: Thu, 28 Apr 2022 18:21:50 +0200 Message-Id: <3167cbec7a82704c1ed2c6bfe85b77534a836fdc.1651162840.git.andreyknvl@google.com> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Stat-Signature: oro1cwgxpckqfw9k1jqg7ipqgs9czcfb X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 67FEDC0058 Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="scASAs6/"; spf=pass (imf22.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-Rspam-User: X-HE-Tag: 1651162918-752892 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 Clean up comments in mm/kasan/kasan.h: clarify, unify styles, fix punctuation, etc. Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko --- mm/kasan/kasan.h | 71 +++++++++++++++++++++--------------------------- 1 file changed, 31 insertions(+), 40 deletions(-) diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index b01b4bbe0409..13681516dc08 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -42,6 +42,7 @@ static inline bool kasan_sync_fault_possible(void) { return kasan_mode == KASAN_MODE_SYNC || kasan_mode == KASAN_MODE_ASYMM; } + #else static inline bool kasan_stack_collection_enabled(void) @@ -73,47 +74,41 @@ 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 /* page was freed */ -#define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ -#define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ -#define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ -#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */ +#define KASAN_FREE_PAGE 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_VMALLOC_INVALID 0xF8 /* inaccessible space in vmap area */ #else #define KASAN_FREE_PAGE 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_VMALLOC_INVALID KASAN_TAG_INVALID /* only for SW_TAGS */ +#define KASAN_VMALLOC_INVALID KASAN_TAG_INVALID /* only used for SW_TAGS */ #endif #ifdef CONFIG_KASAN_GENERIC -#define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */ +#define KASAN_KMALLOC_FREETRACK 0xFA /* freed slab object with free track */ #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ -/* - * Stack redzone shadow values - * (Those are compiler's ABI, don't change them) - */ +/* Stack redzone shadow values. Compiler's ABI, do not change. */ #define KASAN_STACK_LEFT 0xF1 #define KASAN_STACK_MID 0xF2 #define KASAN_STACK_RIGHT 0xF3 #define KASAN_STACK_PARTIAL 0xF4 -/* - * alloca redzone shadow values - */ +/* alloca redzone shadow values. */ #define KASAN_ALLOCA_LEFT 0xCA #define KASAN_ALLOCA_RIGHT 0xCB +/* alloca redzone size. Compiler's ABI, do not change. */ #define KASAN_ALLOCA_REDZONE_SIZE 32 -/* - * Stack frame marker (compiler ABI). - */ +/* Stack frame marker. Compiler's ABI, do not change. */ #define KASAN_CURRENT_STACK_FRAME_MAGIC 0x41B58AB3 -/* Don't break randconfig/all*config builds */ +/* Dummy value to avoid breaking randconfig/all*config builds. */ #ifndef KASAN_ABI_VERSION #define KASAN_ABI_VERSION 1 #endif @@ -141,21 +136,21 @@ struct kasan_report_info { unsigned long ip; }; -/* The layout of struct dictated by compiler */ +/* Do not change the struct layout: compiler's ABI. */ struct kasan_source_location { const char *filename; int line_no; int column_no; }; -/* The layout of struct dictated by compiler */ +/* Do not change the struct layout: compiler's ABI. */ struct kasan_global { const void *beg; /* Address of the beginning of the global variable. */ size_t size; /* Size of the global variable. */ - size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */ + size_t size_with_redzone; /* Size of the variable + size of the redzone. 32 bytes aligned. */ const void *name; const void *module_name; /* Name of the module where the global variable is declared. */ - unsigned long has_dynamic_init; /* This needed for C++ */ + unsigned long has_dynamic_init; /* This needed for C++. */ #if KASAN_ABI_VERSION >= 4 struct kasan_source_location *location; #endif @@ -164,9 +159,7 @@ struct kasan_global { #endif }; -/** - * Structures to keep alloc and free tracks * - */ +/* Structures for keeping alloc and free tracks. */ #define KASAN_STACK_DEPTH 64 @@ -183,11 +176,8 @@ struct kasan_track { struct kasan_alloc_meta { struct kasan_track alloc_track; + /* Generic mode stores free track in kasan_free_meta. */ #ifdef CONFIG_KASAN_GENERIC - /* - * The auxiliary stack is stored into struct kasan_alloc_meta. - * The free stack is stored into struct kasan_free_meta. - */ depot_stack_handle_t aux_stack[2]; #else struct kasan_track free_track[KASAN_NR_FREE_STACKS]; @@ -203,18 +193,18 @@ struct qlist_node { }; /* - * Generic mode either stores free meta in the object itself or in the redzone - * after the object. In the former case free meta offset is 0, in the latter - * case it has some sane value smaller than INT_MAX. Use INT_MAX as free meta - * offset when free meta isn't present. + * Free meta is stored either in the object itself or in the redzone after the + * object. In the former case, free meta offset is 0. In the latter case, the + * offset is between 0 and INT_MAX. INT_MAX marks that free meta is not present. */ #define KASAN_NO_FREE_META INT_MAX +/* + * Free meta is only used by Generic mode while the object is in quarantine. + * After that, slab allocator stores the freelist pointer in the object. + */ struct kasan_free_meta { #ifdef CONFIG_KASAN_GENERIC - /* This field is used while the object is in the quarantine. - * Otherwise it might be used for the allocator freelist. - */ struct qlist_node quarantine_link; struct kasan_track free_track; #endif @@ -417,9 +407,9 @@ static inline void kasan_unpoison(const void *addr, size_t size, bool init) return; /* * Explicitly initialize the memory with the precise object size to - * avoid overwriting the SLAB redzone. This disables initialization in + * avoid overwriting the slab redzone. This disables initialization in * the arch code and may thus lead to performance penalty. The penalty - * is accepted since SLAB redzones aren't enabled in production builds. + * is accepted since slab redzones aren't enabled in production builds. */ if (__slub_debug_enabled() && init && ((unsigned long)size & KASAN_GRANULE_MASK)) { @@ -503,8 +493,9 @@ void kasan_restore_multi_shot(bool enabled); /* * Exported functions for interfaces called from assembly or from generated - * code. Declarations here to avoid warning about missing declarations. + * code. Declared here to avoid warnings about missing declarations. */ + asmlinkage void kasan_unpoison_task_stack_below(const void *watermark); void __asan_register_globals(struct kasan_global *globals, size_t size); void __asan_unregister_globals(struct kasan_global *globals, size_t size); @@ -573,4 +564,4 @@ void __hwasan_storeN_noabort(unsigned long addr, size_t size); void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size); -#endif +#endif /* __MM_KASAN_KASAN_H */ From patchwork Thu Apr 28 16:21:51 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: 12830997 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 570FEC433EF for ; Thu, 28 Apr 2022 16:22:01 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D6FE96B00C6; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CF5998D0006; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B94858D0003; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.27]) by kanga.kvack.org (Postfix) with ESMTP id A848D6B00C7 for ; Thu, 28 Apr 2022 12:22:00 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 7AAB82993 for ; Thu, 28 Apr 2022 16:22:00 +0000 (UTC) X-FDA: 79406804400.08.95F440A Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf19.hostedemail.com (Postfix) with ESMTP id 9C2D91A005A for ; Thu, 28 Apr 2022 16:21:55 +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=1651162917; 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=ScfRiX1QGknyiNAjIBYqs4VvQ59BCXbjYO7mgxh1RLQ=; b=Ljf+8djCHvl0bjxq+iIreKVSb56/xRs6kVfEazeA8DB1DrDEp2FenrJJHhl8TxQFCjJu5r 3IMOpW1287MbIGCRAPir7Aw+6ngEfiDS6mo1b6hyD/rS2TWVJ2Cy4KHG70EkCEdpKAXiS9 C457Ica9DFy6TlWCdWlC0+hhySpSBOI= 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 2/3] kasan: use tabs to align shadow values Date: Thu, 28 Apr 2022 18:21:51 +0200 Message-Id: <91a979ef1eb9aa68d820234663ad797b4818e098.1651162840.git.andreyknvl@google.com> In-Reply-To: <3167cbec7a82704c1ed2c6bfe85b77534a836fdc.1651162840.git.andreyknvl@google.com> References: <3167cbec7a82704c1ed2c6bfe85b77534a836fdc.1651162840.git.andreyknvl@google.com> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Stat-Signature: 953bm1ogopx5z9onfpdyjs4oa5nbua1i Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Ljf+8djC; spf=pass (imf19.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-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 9C2D91A005A X-HE-Tag: 1651162915-139254 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 Consistently use tabs instead of spaces to shadow value definitions. Signed-off-by: Andrey Konovalov --- mm/kasan/kasan.h | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 13681516dc08..06fdea41ca4a 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -74,29 +74,29 @@ 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_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_VMALLOC_INVALID 0xF8 /* inaccessible space in vmap area */ +#define KASAN_FREE_PAGE 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_VMALLOC_INVALID 0xF8 /* inaccessible space in vmap area */ #else -#define KASAN_FREE_PAGE 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_VMALLOC_INVALID KASAN_TAG_INVALID /* only used for SW_TAGS */ +#define KASAN_FREE_PAGE 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_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_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ +#define KASAN_KMALLOC_FREETRACK 0xFA /* freed slab object with free track */ +#define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ /* Stack redzone shadow values. Compiler's ABI, do not change. */ -#define KASAN_STACK_LEFT 0xF1 -#define KASAN_STACK_MID 0xF2 -#define KASAN_STACK_RIGHT 0xF3 -#define KASAN_STACK_PARTIAL 0xF4 +#define KASAN_STACK_LEFT 0xF1 +#define KASAN_STACK_MID 0xF2 +#define KASAN_STACK_RIGHT 0xF3 +#define KASAN_STACK_PARTIAL 0xF4 /* alloca redzone shadow values. */ #define KASAN_ALLOCA_LEFT 0xCA From patchwork Thu Apr 28 16:21:52 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: 12830999 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 D0226C433FE for ; Thu, 28 Apr 2022 16:22:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D93626B00C7; Thu, 28 Apr 2022 12:22:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D1BE58D0005; Thu, 28 Apr 2022 12:22:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BE28A6B00C9; Thu, 28 Apr 2022 12:22:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.27]) by kanga.kvack.org (Postfix) with ESMTP id A923B6B00C7 for ; Thu, 28 Apr 2022 12:22:01 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 751E02ACEA for ; Thu, 28 Apr 2022 16:22:01 +0000 (UTC) X-FDA: 79406804442.09.1AB9BA1 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf21.hostedemail.com (Postfix) with ESMTP id 13E401C0063 for ; Thu, 28 Apr 2022 16:21:56 +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=1651162919; 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=BH942fTrVXtBdrYiEmF6IffforHv8CYbMy+kTtVqBFE=; b=fVu2K6g4IWkIBc2L8njf0e84MXt+GosHS2pV4rXJqsjduauDqeQZpRuU0khk8BwBB8e6vR A74bK3KdxQTvU24RQODO1Rtr7CJiiohEWRTgZMHZEWPB1EwmTenoupIVT6tAYbG9u9cjfK izwTOxgwO4Doby7XRNVJwIcfQfrwfJA= 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 3/3] kasan: give better names to shadow values Date: Thu, 28 Apr 2022 18:21:52 +0200 Message-Id: In-Reply-To: <3167cbec7a82704c1ed2c6bfe85b77534a836fdc.1651162840.git.andreyknvl@google.com> References: <3167cbec7a82704c1ed2c6bfe85b77534a836fdc.1651162840.git.andreyknvl@google.com> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=fVu2K6g4; spf=pass (imf21.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-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 13E401C0063 X-Stat-Signature: g8kamgffqzouu65iqfi8ei7x9au6tsz4 X-HE-Tag: 1651162916-998149 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. Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko --- 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 06fdea41ca4a..41681d3c551d 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's 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: