| Message ID | 20240212130116.997627-1-elver@google.com (mailing list archive) |
|---|---|
| State | In Next |
| Headers | show |
| Series | hardening: Enable KFENCE in the hardening config | expand |
Hi Marco, On 12/02/2024 14:01, Marco Elver wrote: > 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. Thank you for having sent this patch! Cheers, Matt
On Mon, Feb 12, 2024 at 02:01:09PM +0100, Marco Elver wrote: > 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> Thanks! Applied to my for-next/hardening tree. https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?h=for-next/hardening&id=1f82cb2f3859540120e990a79abfee8151ea6b93 -Kees
diff --git a/kernel/configs/hardening.config b/kernel/configs/hardening.config index 95a400f042b1..79c865bfb116 100644 --- a/kernel/configs/hardening.config +++ b/kernel/configs/hardening.config @@ -46,6 +46,9 @@ CONFIG_UBSAN_BOUNDS=y # CONFIG_UBSAN_ALIGNMENT CONFIG_UBSAN_SANITIZE_ALL=y +# Sampling-based heap out-of-bounds and use-after-free detection. +CONFIG_KFENCE=y + # Linked list integrity checking. CONFIG_LIST_HARDENED=y
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> --- kernel/configs/hardening.config | 3 +++ 1 file changed, 3 insertions(+)