diff options
| -rw-r--r-- | arch/Kconfig | 18 | ||||
| -rw-r--r-- | init/Kconfig | 2 |
2 files changed, 18 insertions, 2 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 98157b38f5cf..8af374ea1adc 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -838,7 +838,7 @@ config CFI_CLANG config CFI_ICALL_NORMALIZE_INTEGERS bool "Normalize CFI tags for integers" depends on CFI_CLANG - depends on $(cc-option,-fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers) + depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS help This option normalizes the CFI tags for integer types so that all integer types of the same size and signedness receive the same CFI @@ -851,6 +851,22 @@ config CFI_ICALL_NORMALIZE_INTEGERS This option is necessary for using CFI with Rust. If unsure, say N. +config HAVE_CFI_ICALL_NORMALIZE_INTEGERS + def_bool !GCOV_KERNEL && !KASAN + depends on CFI_CLANG + depends on $(cc-option,-fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers) + help + Is CFI_ICALL_NORMALIZE_INTEGERS supported with the set of compilers + currently in use? + + This option defaults to false if GCOV or KASAN is enabled, as there is + an LLVM bug that makes normalized integers tags incompatible with + KASAN and GCOV. Kconfig currently does not have the infrastructure to + detect whether your rustc compiler contains the fix for this bug, so + it is assumed that it doesn't. If your compiler has the fix, you can + explicitly enable this option in your config file. The Kconfig logic + needed to detect this will be added in a future kernel release. + config CFI_PERMISSIVE bool "Use CFI in permissive mode" depends on CFI_CLANG diff --git a/init/Kconfig b/init/Kconfig index 9a2bcba426c5..530a382ee0fe 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1946,7 +1946,7 @@ config RUST depends on !GCC_PLUGIN_RANDSTRUCT depends on !RANDSTRUCT depends on !DEBUG_INFO_BTF || PAHOLE_HAS_LANG_EXCLUDE - depends on !CFI_CLANG || RUSTC_VERSION >= 107900 && $(cc-option,-fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers) + depends on !CFI_CLANG || RUSTC_VERSION >= 107900 && HAVE_CFI_ICALL_NORMALIZE_INTEGERS select CFI_ICALL_NORMALIZE_INTEGERS if CFI_CLANG depends on !CALL_PADDING || RUSTC_VERSION >= 108100 depends on !KASAN_SW_TAGS |