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linux-headers-6.8.0-88
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Kconfig.kmsan
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# SPDX-License-Identifier: GPL-2.0-only 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) config KMSAN bool "KMSAN: detector of uninitialized values use" depends on HAVE_ARCH_KMSAN && HAVE_KMSAN_COMPILER depends on DEBUG_KERNEL && !KASAN && !KCSAN depends on !PREEMPT_RT select STACKDEPOT select STACKDEPOT_ALWAYS_INIT help KernelMemorySanitizer (KMSAN) is a dynamic detector of uses of uninitialized values in the kernel. It is based on compiler instrumentation provided by Clang and thus requires Clang to build. An important note is that KMSAN is not intended for production use, because it drastically increases kernel memory footprint and slows the whole system down. See <file:Documentation/dev-tools/kmsan.rst> for more details. 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 function return value. Disabling KMSAN_CHECK_PARAM_RETVAL will result in tracking shadow for function parameters and return values across function borders. This is a more relaxed mode, but it generates more instrumentation code and may potentially report errors in corner cases when non-instrumented functions call instrumented ones. config KMSAN_KUNIT_TEST tristate "KMSAN integration test suite" if !KUNIT_ALL_TESTS default KUNIT_ALL_TESTS depends on TRACEPOINTS && KUNIT help Test suite for KMSAN, testing various error detection scenarios, and checking that reports are correctly output to console. Say Y here if you want the test to be built into the kernel and run during boot; say M if you want the test to build as a module; say N if you are unsure. endif