diff options
| author | Nathan Chancellor <nathan@kernel.org> | 2025-08-21 14:15:49 -0700 |
|---|---|---|
| committer | Nathan Chancellor <nathan@kernel.org> | 2025-08-28 16:58:46 -0700 |
| commit | 5ff8c11775c744dc5076ce126eb1b3adce0a70ae (patch) | |
| tree | b2b5ae6402208a6816e500824b805b44d8572c78 /lib | |
| parent | 573ad421cc551eb45d9ac9008395f93c070789b8 (diff) | |
KMSAN: Remove tautological checks
Now that the minimum supported version of LLVM for building the kernel
has been bumped to 15.0.0, two KMSAN checks can be cleaned up.
CONFIG_HAVE_KMSAN_COMPILER will always be true when using clang so
remove the cc-option test and use a simple check for CONFIG_CC_IS_CLANG.
CONFIG_HAVE_KMSAN_PARAM_RETVAL will always be true so it can be removed
outright.
Acked-by: Marco Elver <elver@google.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/r/20250821-bump-min-llvm-ver-15-v2-12-635f3294e5f0@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.kmsan | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/lib/Kconfig.kmsan b/lib/Kconfig.kmsan index 0541d7b079cc..7251b6b59e69 100644 --- a/lib/Kconfig.kmsan +++ b/lib/Kconfig.kmsan @@ -3,10 +3,7 @@ config HAVE_ARCH_KMSAN bool config HAVE_KMSAN_COMPILER - # Clang versions <14.0.0 also support -fsanitize=kernel-memory, but not - # all the features necessary to build the kernel with KMSAN. - depends on CC_IS_CLANG && CLANG_VERSION >= 140000 - def_bool $(cc-option,-fsanitize=kernel-memory -mllvm -msan-disable-checks=1) + def_bool CC_IS_CLANG config KMSAN bool "KMSAN: detector of uninitialized values use" @@ -28,15 +25,9 @@ config KMSAN if KMSAN -config HAVE_KMSAN_PARAM_RETVAL - # -fsanitize-memory-param-retval is supported only by Clang >= 14. - depends on HAVE_KMSAN_COMPILER - def_bool $(cc-option,-fsanitize=kernel-memory -fsanitize-memory-param-retval) - config KMSAN_CHECK_PARAM_RETVAL bool "Check for uninitialized values passed to and returned from functions" default y - depends on HAVE_KMSAN_PARAM_RETVAL help If the compiler supports -fsanitize-memory-param-retval, KMSAN will eagerly check every function parameter passed by value and every |