From: Andrey Konovalov <andreyknvl@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Marco Elver <elver@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Branislav Rankov <Branislav.Rankov@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH mm v4 05/19] kasan: allow VMAP_STACK for HW_TAGS mode
Date: Mon, 23 Nov 2020 21:14:35 +0100 [thread overview]
Message-ID: <ecdb2a1658ebd88eb276dee2493518ac0e82de41.1606162397.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1606162397.git.andreyknvl@google.com>
Even though hardware tag-based mode currently doesn't support checking
vmalloc allocations, it doesn't use shadow memory and works with
VMAP_STACK as is. Change VMAP_STACK definition accordingly.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://linux-review.googlesource.com/id/I3552cbc12321dec82cd7372676e9372a2eb452ac
---
arch/Kconfig | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/Kconfig b/arch/Kconfig
index 762096e4ec16..6092102b29e9 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -955,16 +955,16 @@ config VMAP_STACK
default y
bool "Use a virtually-mapped stack"
depends on HAVE_ARCH_VMAP_STACK
- depends on !KASAN || KASAN_VMALLOC
+ depends on !KASAN || KASAN_HW_TAGS || KASAN_VMALLOC
help
Enable this if you want the use virtually-mapped kernel stacks
with guard pages. This causes kernel stack overflows to be
caught immediately rather than causing difficult-to-diagnose
corruption.
- To use this with KASAN, the architecture must support backing
- virtual mappings with real shadow memory, and KASAN_VMALLOC must
- be enabled.
+ To use this with software KASAN modes, the architecture must support
+ backing virtual mappings with real shadow memory, and KASAN_VMALLOC
+ must be enabled.
config ARCH_OPTIONAL_KERNEL_RWX
def_bool n
--
2.29.2.454.gaff20da3a2-goog
next prev parent reply other threads:[~2020-11-23 20:15 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-23 20:14 [PATCH mm v4 00/19] kasan: boot parameters for hardware tag-based mode Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 01/19] kasan: simplify quarantine_put call site Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 02/19] kasan: rename get_alloc/free_info Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 03/19] kasan: introduce set_alloc_info Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 04/19] kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK Andrey Konovalov
2020-11-23 20:14 ` Andrey Konovalov [this message]
2020-11-23 20:14 ` [PATCH mm v4 06/19] kasan: remove __kasan_unpoison_stack Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 07/19] kasan: inline kasan_reset_tag for tag-based modes Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 08/19] kasan: inline random_tag for HW_TAGS Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 09/19] kasan: open-code kasan_unpoison_slab Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 10/19] kasan: inline (un)poison_range and check_invalid_free Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 11/19] kasan: add and integrate kasan boot parameters Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 12/19] kasan, mm: check kasan_enabled in annotations Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 13/19] kasan, mm: rename kasan_poison_kfree Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 14/19] kasan: don't round_up too much Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 15/19] kasan: simplify assign_tag and set_tag calls Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 16/19] kasan: clarify comment in __kasan_kfree_large Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 17/19] kasan: sanitize objects when metadata doesn't fit Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 18/19] kasan, mm: allow cache merging with no metadata Andrey Konovalov
2020-11-23 20:14 ` [PATCH mm v4 19/19] kasan: update documentation Andrey Konovalov
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