[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241021120013.3209481-2-elver@google.com>
Date: Mon, 21 Oct 2024 14:00:11 +0200
From: Marco Elver <elver@...gle.com>
To: elver@...gle.com, Will Deacon <will@...nel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@...il.com>, Alexander Potapenko <glider@...gle.com>,
Andrey Konovalov <andreyknvl@...il.com>, Dmitry Vyukov <dvyukov@...gle.com>,
Vincenzo Frascino <vincenzo.frascino@....com>, Mark Rutland <mark.rutland@....com>,
linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com,
llvm@...ts.linux.dev, Andrew Pinski <pinskia@...il.com>
Subject: [PATCH 2/2] Revert "kasan: Disable Software Tag-Based KASAN with GCC"
This reverts commit 7aed6a2c51ffc97a126e0ea0c270fab7af97ae18.
Now that __no_sanitize_address attribute is fixed for KASAN_SW_TAGS with
GCC, allow re-enabling KASAN_SW_TAGS with GCC.
Cc: Andrey Konovalov <andreyknvl@...il.com>
Cc: Andrew Pinski <pinskia@...il.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Will Deacon <will@...nel.org>
Signed-off-by: Marco Elver <elver@...gle.com>
---
lib/Kconfig.kasan | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 233ab2096924..98016e137b7f 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -22,11 +22,8 @@ config ARCH_DISABLE_KASAN_INLINE
config CC_HAS_KASAN_GENERIC
def_bool $(cc-option, -fsanitize=kernel-address)
-# GCC appears to ignore no_sanitize_address when -fsanitize=kernel-hwaddress
-# is passed. See https://bugzilla.kernel.org/show_bug.cgi?id=218854 (and
-# the linked LKML thread) for more details.
config CC_HAS_KASAN_SW_TAGS
- def_bool !CC_IS_GCC && $(cc-option, -fsanitize=kernel-hwaddress)
+ def_bool $(cc-option, -fsanitize=kernel-hwaddress)
# This option is only required for software KASAN modes.
# Old GCC versions do not have proper support for no_sanitize_address.
@@ -101,7 +98,7 @@ config KASAN_SW_TAGS
help
Enables Software Tag-Based KASAN.
- Requires Clang.
+ Requires GCC 11+ or Clang.
Supported only on arm64 CPUs and relies on Top Byte Ignore.
--
2.47.0.rc1.288.g06298d1525-goog
Powered by blists - more mailing lists