1 # SPDX-License-Identifier: GPL-2.0-only
2 config HAVE_ARCH_KMSAN
3 bool
4
5 config HAVE_KMSAN_COMPILER
6 # Clang versions <14.0.0 also support
7 # all the features necessary to build
8 depends on CC_IS_CLANG && CLANG_VERSIO
9 def_bool $(cc-option,-fsanitize=kernel
10
11 config KMSAN
12 bool "KMSAN: detector of uninitialized
13 depends on HAVE_ARCH_KMSAN && HAVE_KMS
14 depends on DEBUG_KERNEL && !KASAN && !
15 depends on !PREEMPT_RT
16 select STACKDEPOT
17 select STACKDEPOT_ALWAYS_INIT
18 help
19 KernelMemorySanitizer (KMSAN) is a d
20 uninitialized values in the kernel.
21 instrumentation provided by Clang an
22
23 An important note is that KMSAN is n
24 because it drastically increases ker
25 the whole system down.
26
27 See <file:Documentation/dev-tools/km
28
29 if KMSAN
30
31 config HAVE_KMSAN_PARAM_RETVAL
32 # -fsanitize-memory-param-retval is su
33 depends on HAVE_KMSAN_COMPILER
34 def_bool $(cc-option,-fsanitize=kernel
35
36 config KMSAN_CHECK_PARAM_RETVAL
37 bool "Check for uninitialized values p
38 default y
39 depends on HAVE_KMSAN_PARAM_RETVAL
40 help
41 If the compiler supports -fsanitize-
42 eagerly check every function paramet
43 function return value.
44
45 Disabling KMSAN_CHECK_PARAM_RETVAL w
46 function parameters and return value
47 is a more relaxed mode, but it gener
48 may potentially report errors in cor
49 functions call instrumented ones.
50
51 config KMSAN_KUNIT_TEST
52 tristate "KMSAN integration test suite
53 default KUNIT_ALL_TESTS
54 depends on TRACEPOINTS && KUNIT
55 help
56 Test suite for KMSAN, testing variou
57 and checking that reports are correc
58
59 Say Y here if you want the test to b
60 during boot; say M if you want the t
61 if you are unsure.
62
63 endif
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