* [merged] kasan-allow-vmap_stack-for-hw_tags-mode.patch removed from -mm tree
@ 2020-12-23 18:29 akpm
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From: akpm @ 2020-12-23 18:29 UTC (permalink / raw)
To: andreyknvl, aryabinin, Branislav.Rankov, catalin.marinas,
dvyukov, elver, eugenis, glider, gor, kevin.brodsky, mm-commits,
vincenzo.frascino, will.deacon
The patch titled
Subject: kasan: allow VMAP_STACK for HW_TAGS mode
has been removed from the -mm tree. Its filename was
kasan-allow-vmap_stack-for-hw_tags-mode.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@google.com>
Subject: kasan: allow VMAP_STACK for HW_TAGS mode
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.
Link: https://lkml.kernel.org/r/ecdb2a1658ebd88eb276dee2493518ac0e82de41.1606162397.git.andreyknvl@google.com
Link: https://linux-review.googlesource.com/id/I3552cbc12321dec82cd7372676e9372a2eb452ac
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>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/Kconfig | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/arch/Kconfig~kasan-allow-vmap_stack-for-hw_tags-mode
+++ a/arch/Kconfig
@@ -976,16 +976,16 @@ 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
_
Patches currently in -mm which might be from andreyknvl@google.com are
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2020-12-23 18:29 [merged] kasan-allow-vmap_stack-for-hw_tags-mode.patch removed from -mm tree akpm
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