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| author | David S. Miller <davem@davemloft.net> | 2019-03-05 00:26:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-03-05 00:26:15 +0300 |
| commit | 18a4d8bf250a33c015955f0dec27259780ef6448 (patch) | |
| tree | 3e380812ac047fef70c0da52ba74705ee62b7130 /lib | |
| parent | 096461de96a94c856190ba892ebf62dfba5a38f1 (diff) | |
| parent | 822e44b45eb991c63487c5e2ce7d636411870a8d (diff) | |
| download | linux-18a4d8bf250a33c015955f0dec27259780ef6448.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.kasan | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index d8c474b6691e..9737059ec58b 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -113,6 +113,28 @@ config KASAN_INLINE endchoice +config KASAN_STACK_ENABLE + bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST + default !(CLANG_VERSION < 90000) + depends on KASAN + help + The LLVM stack address sanitizer has a know problem that + causes excessive stack usage in a lot of functions, see + https://bugs.llvm.org/show_bug.cgi?id=38809 + Disabling asan-stack makes it safe to run kernels build + with clang-8 with KASAN enabled, though it loses some of + the functionality. + This feature is always disabled when compile-testing with clang-8 + or earlier to avoid cluttering the output in stack overflow + warnings, but clang-8 users can still enable it for builds without + CONFIG_COMPILE_TEST. On gcc and later clang versions it is + assumed to always be safe to use and enabled by default. + +config KASAN_STACK + int + default 1 if KASAN_STACK_ENABLE || CC_IS_GCC + default 0 + config KASAN_S390_4_LEVEL_PAGING bool "KASan: use 4-level paging" depends on KASAN && S390 |