7 bool "KASan: runtime memory debugger"
9 Enables kernel address sanitizer - runtime memory debugger,
10 designed to find out-of-bounds accesses and use-after-free bugs.
11 This is strictly debugging feature. It consumes about 1/8
12 of available memory and brings about ~x3 performance slowdown.
13 For better error detection enable CONFIG_STACKTRACE,
14 and add slub_debug=U to boot cmdline.
16 config KASAN_SHADOW_OFFSET
18 default 0xdffffc0000000000 if X86_64
21 prompt "Instrumentation type"
26 bool "Outline instrumentation"
28 Before every memory access compiler insert function call
29 __asan_load*/__asan_store*. These functions performs check
30 of shadow memory. This is slower than inline instrumentation,
31 however it doesn't bloat size of kernel's .text section so
35 bool "Inline instrumentation"
37 Compiler directly inserts code checking shadow memory before
38 memory accesses. This is faster than outline (in some workloads
39 it gives about x2 boost over outline instrumentation), but
40 make kernel's .text size much bigger.