+ kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch added to -mm tree

+ kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch added to -mm tree

[akpm]

The patch titled
     Subject: kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS
has been added to the -mm tree.  Its filename is
     kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch

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------------------------------------------------------
From: Marco Elver <elver@google.com>
Subject: kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS

In the main KASAN config option CC_HAS_WORKING_NOSANITIZE_ADDRESS is
checked for instrumentation-based modes.  However, if
HAVE_ARCH_KASAN_HW_TAGS is true all modes may still be selected.

To fix, also make the software modes depend on
CC_HAS_WORKING_NOSANITIZE_ADDRESS.

Link: https://lkml.kernel.org/r/20210910084240.1215803-1-elver@google.com
Fixes: 6a63a63ff1ac ("kasan: introduce CONFIG_KASAN_HW_TAGS")
Signed-off-by: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Aleksandr Nogikh <nogikh@google.com>
Cc: Taras Madan <tarasmadan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/Kconfig.kasan |    2 ++
 1 file changed, 2 insertions(+)

--- a/lib/Kconfig.kasan~kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address
+++ a/lib/Kconfig.kasan
@@ -66,6 +66,7 @@ choice
 config KASAN_GENERIC
 	bool "Generic mode"
 	depends on HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC
+	depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
 	select SLUB_DEBUG if SLUB
 	select CONSTRUCTORS
 	help
@@ -86,6 +87,7 @@ config KASAN_GENERIC
 config KASAN_SW_TAGS
 	bool "Software tag-based mode"
 	depends on HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS
+	depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
 	select SLUB_DEBUG if SLUB
 	select CONSTRUCTORS
 	help
_

Patches currently in -mm which might be from elver@google.com are

kasan-fix-kconfig-check-of-cc_has_working_nosanitize_address.patch