diff --git a/etc/default/grub.d/40_kernel_hardening.cfg b/etc/default/grub.d/40_kernel_hardening.cfg index 0a39fa9..be234e5 100644 --- a/etc/default/grub.d/40_kernel_hardening.cfg +++ b/etc/default/grub.d/40_kernel_hardening.cfg @@ -1,2 +1,11 @@ # Disables the merging of slabs of similar sizes. Sometimes a slab can be used in a vulnerable way which an attacker can exploit. GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_nomerge" + +# Enables sanity checks (F), redzoning (Z) and poisoning (P). +GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX slab_debug=FZP" + +# Wipes free memory so it can't leak in various ways and prevents some use-after-free vulnerabilites. +GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX page_poison=1" + +# Makes the kernel panic on uncorrectable errors in ECC memory that an attacker could exploit. +GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mce=0"