From: andrey.konovalov@linux.dev
To: Marco Elver <elver@google.com>,
Alexander Potapenko <glider@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org,
Peter Collingbourne <pcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH mm v3 15/38] kasan: clean up metadata byte definitions
Date: Mon, 13 Dec 2021 22:53:05 +0100 [thread overview]
Message-ID: <e82b75533a93a5fc85e24b782c6177457af0755d.1639432170.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1639432170.git.andreyknvl@google.com>
From: Andrey Konovalov <andreyknvl@google.com>
Most of the metadata byte values are only used for Generic KASAN.
Remove KASAN_KMALLOC_FREETRACK definition for !CONFIG_KASAN_GENERIC
case, and put it along with other metadata values for the Generic
mode under a corresponding ifdef.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
mm/kasan/kasan.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index c17fa8d26ffe..952cd6f9ca46 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -71,15 +71,16 @@ static inline bool kasan_sync_fault_possible(void)
#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_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */
#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_KMALLOC_FREETRACK KASAN_TAG_INVALID
#endif
+#ifdef CONFIG_KASAN_GENERIC
+
+#define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */
#define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */
#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */
@@ -110,6 +111,8 @@ static inline bool kasan_sync_fault_possible(void)
#define KASAN_ABI_VERSION 1
#endif
+#endif /* CONFIG_KASAN_GENERIC */
+
/* Metadata layout customization. */
#define META_BYTES_PER_BLOCK 1
#define META_BLOCKS_PER_ROW 16
--
2.25.1
next prev parent reply other threads:[~2021-12-13 21:53 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 21:51 [PATCH mm v3 00/38] kasan, vmalloc, arm64: add vmalloc tagging support for SW/HW_TAGS andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 01/38] kasan, page_alloc: deduplicate should_skip_kasan_poison andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 02/38] kasan, page_alloc: move tag_clear_highpage out of kernel_init_free_pages andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 03/38] kasan, page_alloc: merge kasan_free_pages into free_pages_prepare andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 04/38] kasan, page_alloc: simplify kasan_poison_pages call site andrey.konovalov
2021-12-16 12:54 ` Alexander Potapenko
2021-12-13 21:51 ` [PATCH mm v3 05/38] kasan, page_alloc: init memory of skipped pages on free andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 06/38] kasan: drop skip_kasan_poison variable in free_pages_prepare andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 07/38] mm: clarify __GFP_ZEROTAGS comment andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 08/38] kasan: only apply __GFP_ZEROTAGS when memory is zeroed andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 09/38] kasan, page_alloc: refactor init checks in post_alloc_hook andrey.konovalov
2021-12-16 13:32 ` Alexander Potapenko
2021-12-13 21:51 ` [PATCH mm v3 10/38] kasan, page_alloc: merge kasan_alloc_pages into post_alloc_hook andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 11/38] kasan, page_alloc: combine tag_clear_highpage calls in post_alloc_hook andrey.konovalov
2021-12-16 13:04 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 12/38] kasan, page_alloc: move SetPageSkipKASanPoison " andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 13/38] kasan, page_alloc: move kernel_init_free_pages " andrey.konovalov
2021-12-16 11:00 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 14/38] kasan, page_alloc: simplify kasan_unpoison_pages call site andrey.konovalov
2021-12-13 21:53 ` andrey.konovalov [this message]
2021-12-16 10:52 ` [PATCH mm v3 15/38] kasan: clean up metadata byte definitions Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 16/38] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 17/38] kasan, x86, arm64, s390: rename functions for modules shadow andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 18/38] kasan, vmalloc: drop outdated VM_KASAN comment andrey.konovalov
2021-12-16 10:53 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 19/38] kasan: reorder vmalloc hooks andrey.konovalov
2021-12-16 10:55 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 20/38] kasan: add wrappers for " andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 21/38] kasan, vmalloc: reset tags in vmalloc functions andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 22/38] kasan, fork: reset pointer tags of vmapped stacks andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 23/38] kasan, arm64: " andrey.konovalov
2021-12-13 21:59 ` Andrey Konovalov
2021-12-14 13:25 ` Catalin Marinas
2021-12-13 21:54 ` [PATCH mm v3 24/38] kasan, vmalloc: add vmalloc tagging for SW_TAGS andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 25/38] kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged andrey.konovalov
2021-12-14 17:11 ` Catalin Marinas
2021-12-14 18:27 ` Andrey Konovalov
2021-12-14 19:27 ` Catalin Marinas
2021-12-20 21:38 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 26/38] kasan, vmalloc: don't unpoison VM_ALLOC pages before mapping andrey.konovalov
2021-12-16 19:07 ` Alexander Potapenko
2021-12-20 21:35 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 27/38] kasan, page_alloc: allow skipping unpoisoning for HW_TAGS andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 28/38] kasan, page_alloc: allow skipping memory init " andrey.konovalov
2021-12-14 18:00 ` Marco Elver
2021-12-14 18:28 ` Andrey Konovalov
2021-12-17 1:50 ` Kuan-Ying Lee
2021-12-20 21:35 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 29/38] kasan, vmalloc: add vmalloc tagging " andrey.konovalov
2021-12-14 19:55 ` Marco Elver
2021-12-14 22:08 ` Andrey Konovalov
2021-12-14 21:03 ` Marco Elver
2021-12-13 21:54 ` [PATCH mm v3 30/38] kasan, vmalloc: don't tag executable vmalloc allocations andrey.konovalov
2021-12-14 19:42 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 31/38] kasan, arm64: " andrey.konovalov
2021-12-13 21:59 ` Andrey Konovalov
2021-12-17 13:45 ` Catalin Marinas
2021-12-13 21:54 ` [PATCH mm v3 32/38] kasan: mark kasan_arg_stacktrace as __initdata andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 33/38] kasan: simplify kasan_init_hw_tags andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 34/38] kasan: add kasan.vmalloc command line flag andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 35/38] kasan: allow enabling KASAN_VMALLOC and SW/HW_TAGS andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 36/38] arm64: select KASAN_VMALLOC for SW/HW_TAGS modes andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 37/38] kasan: documentation updates andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 38/38] kasan: improve vmalloc tests andrey.konovalov
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