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[066/114] arm64: select KASAN_VMALLOC for SW/HW_TAGS modes

Message ID 20220325011153.E1C7AC340EC@smtp.kernel.org (mailing list archive)
State New
Headers show
Series [001/114] tools/vm/page_owner_sort.c: sort by stacktrace before culling | expand

Commit Message

Andrew Morton March 25, 2022, 1:11 a.m. UTC 
From: Andrey Konovalov <andreyknvl@google.com>
Subject: arm64: select KASAN_VMALLOC for SW/HW_TAGS modes

Generic KASAN already selects KASAN_VMALLOC to allow VMAP_STACK to be
selected unconditionally, see commit acc3042d62cb9 ("arm64: Kconfig:
select KASAN_VMALLOC if KANSAN_GENERIC is enabled").

The same change is needed for SW_TAGS KASAN.

HW_TAGS KASAN does not require enabling KASAN_VMALLOC for VMAP_STACK, they
already work together as is.  Still, selecting KASAN_VMALLOC still makes
sense to make vmalloc() always protected.  In case any bugs in KASAN's
vmalloc() support are discovered, the command line kasan.vmalloc flag can
be used to disable vmalloc() checking.

Select KASAN_VMALLOC for all KASAN modes for arm64.

Link: https://lkml.kernel.org/r/99d6b3ebf57fc1930ff71f9a4a71eea19881b270.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/arm64/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/arch/arm64/Kconfig~arm64-select-kasan_vmalloc-for-sw-hw_tags-modes
+++ a/arch/arm64/Kconfig
@@ -208,7 +208,7 @@  config ARM64
 	select IOMMU_DMA if IOMMU_SUPPORT
 	select IRQ_DOMAIN
 	select IRQ_FORCED_THREADING
-	select KASAN_VMALLOC if KASAN_GENERIC
+	select KASAN_VMALLOC if KASAN
 	select MODULES_USE_ELF_RELA
 	select NEED_DMA_MAP_STATE
 	select NEED_SG_DMA_LENGTH