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KFENCE is not a security mitigation mechanism (due to sampling), but has the performance characteristics of unintrusive hardening techniques. When used at scale, however, it improves overall security by allowing kernel developers to detect heap memory-safety bugs cheaply. Link: https://lkml.kernel.org/r/79B9A832-B3DE-4229-9D87-748B2CFB7D12@kernel.org Cc: Matthieu Baerts <matttbe@kernel.org> Cc: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Marco Elver <elver@google.com> Link: https://lore.kernel.org/r/20240212130116.997627-1-elver@google.com Signed-off-by: Kees Cook <keescook@chromium.org>