diff options
author | Mark Brown <broonie@kernel.org> | 2015-03-10 10:37:02 +0000 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2015-03-10 10:37:02 +0000 |
commit | eb5bc2a213f96bd43b5f00a625acb0c669613645 (patch) | |
tree | 6093a86c9e704ebfed54adb426ff3079a428da93 /lib/Kconfig.kasan | |
parent | ASoC: rt5670: Check sysclk source by private data (diff) | |
parent | Linux 4.0-rc3 (diff) | |
download | linux-dev-eb5bc2a213f96bd43b5f00a625acb0c669613645.tar.xz linux-dev-eb5bc2a213f96bd43b5f00a625acb0c669613645.zip |
Merge tag 'v4.0-rc3' into asoc-rt5670
Linux 4.0-rc3
Conflicts:
sound/soc/codecs/rt5670.c
Diffstat (limited to 'lib/Kconfig.kasan')
-rw-r--r-- | lib/Kconfig.kasan | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan new file mode 100644 index 000000000000..4fecaedc80a2 --- /dev/null +++ b/lib/Kconfig.kasan @@ -0,0 +1,54 @@ +config HAVE_ARCH_KASAN + bool + +if HAVE_ARCH_KASAN + +config KASAN + bool "KASan: runtime memory debugger" + depends on SLUB_DEBUG + select CONSTRUCTORS + help + Enables kernel address sanitizer - runtime memory debugger, + designed to find out-of-bounds accesses and use-after-free bugs. + This is strictly debugging feature. It consumes about 1/8 + of available memory and brings about ~x3 performance slowdown. + For better error detection enable CONFIG_STACKTRACE, + and add slub_debug=U to boot cmdline. + +config KASAN_SHADOW_OFFSET + hex + default 0xdffffc0000000000 if X86_64 + +choice + prompt "Instrumentation type" + depends on KASAN + default KASAN_OUTLINE + +config KASAN_OUTLINE + bool "Outline instrumentation" + help + Before every memory access compiler insert function call + __asan_load*/__asan_store*. These functions performs check + of shadow memory. This is slower than inline instrumentation, + however it doesn't bloat size of kernel's .text section so + much as inline does. + +config KASAN_INLINE + bool "Inline instrumentation" + help + Compiler directly inserts code checking shadow memory before + memory accesses. This is faster than outline (in some workloads + it gives about x2 boost over outline instrumentation), but + make kernel's .text size much bigger. + +endchoice + +config TEST_KASAN + tristate "Module for testing kasan for bug detection" + depends on m && KASAN + help + This is a test module doing various nasty things like + out of bounds accesses, use after free. It is useful for testing + kernel debugging features like kernel address sanitizer. + +endif |