Merge tag 'dm-4.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device...

[linux-2.6-block.git] / lib / Kconfig.kasan

diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 4fecaedc80a27adadb25bfa2d4e4a13dc182ab72..777eda7d1ab4bff70b8aa465e336465239c9f1b9 100644 (file)
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -10,8 +10,11 @@ config KASAN
        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.
+         This is strictly a debugging feature and it requires a gcc version
+         of 4.9.2 or later. Detection of out of bounds accesses to stack or
+         global variables requires gcc 5.0 or later.
+         This feature 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.
 
@@ -40,6 +43,7 @@ config KASAN_INLINE
          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.
+         This requires a gcc version of 5.0 or later.
 
 endchoice