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-rw-r--r--security/Kconfig.hardening14
1 files changed, 10 insertions, 4 deletions
diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening
index bd2aabb2c60f..995bc42003e6 100644
--- a/security/Kconfig.hardening
+++ b/security/Kconfig.hardening
@@ -22,11 +22,17 @@ menu "Memory initialization"
config CC_HAS_AUTO_VAR_INIT_PATTERN
def_bool $(cc-option,-ftrivial-auto-var-init=pattern)
-config CC_HAS_AUTO_VAR_INIT_ZERO
- # GCC ignores the -enable flag, so we can test for the feature with
- # a single invocation using the flag, but drop it as appropriate in
- # the Makefile, depending on the presence of Clang.
+config CC_HAS_AUTO_VAR_INIT_ZERO_BARE
+ def_bool $(cc-option,-ftrivial-auto-var-init=zero)
+
+config CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
+ # Clang 16 and later warn about using the -enable flag, but it
+ # is required before then.
def_bool $(cc-option,-ftrivial-auto-var-init=zero -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang)
+ depends on !CC_HAS_AUTO_VAR_INIT_ZERO_BARE
+
+config CC_HAS_AUTO_VAR_INIT_ZERO
+ def_bool CC_HAS_AUTO_VAR_INIT_ZERO_BARE || CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
choice
prompt "Initialize kernel stack variables at function entry"