The following commit has been merged into the x86/entry branch of tip: Commit-ID: 7b861a53e46b6b42ab8560b105af308cb72d7285 Gitweb: https://git.kernel.org/tip/7b861a53e46b6b42ab8560b105af308cb72d7285 Author: Marco Elver <elver@xxxxxxxxxx> AuthorDate: Thu, 04 Jun 2020 07:58:10 +02:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Mon, 15 Jun 2020 14:10:09 +02:00 kasan: Bump required compiler version Adds config variable CC_HAS_WORKING_NOSANITIZE_ADDRESS, which will be true if we have a compiler that does not fail builds due to no_sanitize_address functions. This does not yet mean they work as intended, but for automated build-tests, this is the minimum requirement. For example, we require that __always_inline functions used from no_sanitize_address functions do not generate instrumentation. On GCC <= 7 this fails to build entirely, therefore we make the minimum version GCC 8. Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Signed-off-by: Marco Elver <elver@xxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Acked-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Link: https://lkml.kernel.org/r/20200602175859.GC2604@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx --- lib/Kconfig.kasan | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index 81f5464..af0dd09 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -15,11 +15,15 @@ config CC_HAS_KASAN_GENERIC config CC_HAS_KASAN_SW_TAGS def_bool $(cc-option, -fsanitize=kernel-hwaddress) +config CC_HAS_WORKING_NOSANITIZE_ADDRESS + def_bool !CC_IS_GCC || GCC_VERSION >= 80000 + config KASAN bool "KASAN: runtime memory debugger" depends on (HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC) || \ (HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS) depends on (SLUB && SYSFS) || (SLAB && !DEBUG_SLAB) + depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS help Enables KASAN (KernelAddressSANitizer) - runtime memory debugger, designed to find out-of-bounds accesses and use-after-free bugs.
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