[PATCH mm v4 05/19] kasan: allow VMAP_STACK for HW_TAGS mode

[Andrey Konovalov]

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 at google.com>
Reviewed-by: Marco Elver <elver at google.com>
Acked-by: Catalin Marinas <catalin.marinas at arm.com>
Reviewed-by: Dmitry Vyukov <dvyukov at 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