From: andrey.konovalov@linux.dev
To: Marco Elver <elver@google.com>,
Alexander Potapenko <glider@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Peter Collingbourne <pcc@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
kasan-dev@googlegroups.com,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Evgenii Stepanov <eugenis@google.com>,
linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH 15/31] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS
Date: Tue, 30 Nov 2021 23:06:44 +0100 [thread overview]
Message-ID: <0cfa94ae26c59bba4329dd384b5a8a5bd6adb891.1638308023.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1638308023.git.andreyknvl@google.com>
From: Andrey Konovalov <andreyknvl@google.com>
In preparation for adding vmalloc support to SW_TAGS KASAN,
provide a KASAN_VMALLOC_INVALID definition for it.
HW_TAGS KASAN won't be using this value, as it falls back onto
page_alloc for poisoning freed vmalloc() memory.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
mm/kasan/kasan.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index a50450160638..0827d74d0d87 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -71,18 +71,19 @@ 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_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */
#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 */
#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 */
/*
* Stack redzone shadow values
--
2.25.1
next prev parent reply other threads:[~2021-11-30 22:06 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 21:39 [PATCH 00/31] kasan, vmalloc, arm64: add vmalloc tagging support for SW/HW_TAGS andrey.konovalov
2021-11-30 21:39 ` [PATCH 01/31] kasan, page_alloc: deduplicate should_skip_kasan_poison andrey.konovalov
2021-11-30 21:39 ` [PATCH 02/31] kasan, page_alloc: move tag_clear_highpage out of kernel_init_free_pages andrey.konovalov
2021-12-02 15:24 ` Alexander Potapenko
2021-11-30 21:39 ` [PATCH 03/31] kasan, page_alloc: merge kasan_free_pages into free_pages_prepare andrey.konovalov
2021-12-02 15:32 ` Alexander Potapenko
2021-11-30 21:39 ` [PATCH 04/31] kasan, page_alloc: simplify kasan_poison_pages call site andrey.konovalov
2021-12-01 14:09 ` Marco Elver
2021-12-06 21:07 ` Andrey Konovalov
2021-11-30 21:39 ` [PATCH 05/31] kasan, page_alloc: init memory of skipped pages on free andrey.konovalov
2021-11-30 21:41 ` [PATCH 06/31] mm: clarify __GFP_ZEROTAGS comment andrey.konovalov
2021-11-30 21:41 ` [PATCH 07/31] kasan: only apply __GFP_ZEROTAGS when memory is zeroed andrey.konovalov
2021-12-02 15:40 ` Alexander Potapenko
2021-11-30 21:41 ` [PATCH 08/31] kasan, page_alloc: refactor init checks in post_alloc_hook andrey.konovalov
2021-12-02 16:13 ` Alexander Potapenko
2021-12-06 21:09 ` Andrey Konovalov
2021-12-16 10:59 ` Alexander Potapenko
2021-11-30 21:42 ` [PATCH 09/31] kasan, page_alloc: merge kasan_alloc_pages into post_alloc_hook andrey.konovalov
2021-11-30 21:52 ` [PATCH 10/31] kasan, page_alloc: combine tag_clear_highpage calls in post_alloc_hook andrey.konovalov
2021-11-30 22:05 ` [PATCH 11/31] kasan, page_alloc: move SetPageSkipKASanPoison " andrey.konovalov
2021-11-30 22:05 ` [PATCH 12/31] kasan, page_alloc: move kernel_init_free_pages " andrey.konovalov
2021-11-30 22:05 ` [PATCH 13/31] kasan, page_alloc: simplify kasan_unpoison_pages call site andrey.konovalov
2021-11-30 22:06 ` [PATCH 14/31] kasan: clean up metadata byte definitions andrey.konovalov
2021-11-30 22:06 ` andrey.konovalov [this message]
2021-11-30 22:06 ` [PATCH 16/31] kasan, x86, arm64, s390: rename functions for modules shadow andrey.konovalov
2021-11-30 22:06 ` [PATCH 17/31] kasan, vmalloc: drop outdated VM_KASAN comment andrey.konovalov
2021-11-30 22:07 ` [PATCH 18/31] kasan: reorder vmalloc hooks andrey.konovalov
2021-11-30 22:07 ` [PATCH 20/31] kasan, vmalloc: reset tags in vmalloc functions andrey.konovalov
2021-12-02 14:17 ` Marco Elver
2021-12-06 21:08 ` Andrey Konovalov
2021-11-30 22:07 ` [PATCH 19/31] kasan: add wrappers for vmalloc hooks andrey.konovalov
2021-11-30 22:07 ` [PATCH 21/31] kasan, fork: don't tag stacks allocated with vmalloc andrey.konovalov
2021-12-02 14:27 ` Marco Elver
2021-12-06 21:08 ` Andrey Konovalov
2021-11-30 22:07 ` [PATCH 22/31] kasan, vmalloc: add vmalloc support to SW_TAGS andrey.konovalov
2021-11-30 22:07 ` [PATCH 23/31] kasan, arm64: allow KASAN_VMALLOC with SW_TAGS andrey.konovalov
2021-12-03 12:37 ` Marco Elver
2021-12-06 21:10 ` Andrey Konovalov
2021-11-30 22:07 ` [PATCH 24/31] kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged andrey.konovalov
2021-12-03 12:42 ` Marco Elver
2021-12-06 21:12 ` Andrey Konovalov
2021-11-30 22:08 ` [PATCH 25/31] kasan, vmalloc: don't unpoison VM_ALLOC pages before mapping andrey.konovalov
2021-11-30 22:08 ` [PATCH 26/31] kasan, page_alloc: allow skipping unpoisoning for HW_TAGS andrey.konovalov
2021-11-30 22:08 ` [PATCH 27/31] kasan, vmalloc: add vmalloc support to HW_TAGS andrey.konovalov
2021-12-03 12:41 ` Marco Elver
2021-12-06 21:12 ` Andrey Konovalov
2021-11-30 22:08 ` [PATCH 28/31] kasan: add kasan.vmalloc command line flag andrey.konovalov
2021-12-03 12:09 ` Marco Elver
2021-12-06 21:09 ` Andrey Konovalov
2021-11-30 22:08 ` [PATCH 29/31] kasan, arm64: allow KASAN_VMALLOC with HW_TAGS andrey.konovalov
2021-12-01 11:35 ` Marco Elver
2021-12-06 21:10 ` Andrey Konovalov
2021-12-03 12:40 ` Marco Elver
2021-12-06 21:10 ` Andrey Konovalov
2021-11-30 22:08 ` [PATCH 30/31] kasan: documentation updates andrey.konovalov
2021-11-30 22:08 ` [PATCH 31/31] kasan: improve vmalloc tests andrey.konovalov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0cfa94ae26c59bba4329dd384b5a8a5bd6adb891.1638308023.git.andreyknvl@google.com \
--to=andrey.konovalov@linux.dev \
--cc=akpm@linux-foundation.org \
--cc=andreyknvl@gmail.com \
--cc=andreyknvl@google.com \
--cc=aryabinin@virtuozzo.com \
--cc=catalin.marinas@arm.com \
--cc=dvyukov@google.com \
--cc=elver@google.com \
--cc=eugenis@google.com \
--cc=glider@google.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=pcc@google.com \
--cc=vincenzo.frascino@arm.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).