CONFIG_KASAN_STACK_ENABLE: Enable stack instrumentation (unsafe)

General informations

The Linux kernel configuration item CONFIG_KASAN_STACK_ENABLE:

• prompt: Enable stack instrumentation (unsafe)
• type: bool
• depends on: ( CONFIG_CC_IS_CLANG && ! CONFIG_COMPILE_TEST ) && ( CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS )
• defined in lib/Kconfig.kasan
• found in Linux kernels: 5.0–5.11

Help text

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 to avoid cluttering the output in stack overflow warnings, but clang users can still enable it for builds without COMPILE_TEST. On gcc it is assumed to always be safe to use and enabled by default.

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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