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| author | Kees Cook <keescook@chromium.org> | 2024-05-01 12:37:12 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2024-05-01 12:38:14 -0700 |
| commit | a284e43852380ab71eeb996389e01992d74a8dde (patch) | |
| tree | d6e06644741e293066c71501f65c8b96dc73a7b6 /kernel/configs | |
| parent | fb28a8862dc4b5bf8e44578338f35d9c6c68339d (diff) | |
| download | linux-a284e43852380ab71eeb996389e01992d74a8dde.tar.gz linux-a284e43852380ab71eeb996389e01992d74a8dde.tar.bz2 linux-a284e43852380ab71eeb996389e01992d74a8dde.zip | |
hardening: Enable KCFI and some other options
Add some stuff that got missed along the way:
- CONFIG_UNWIND_PATCH_PAC_INTO_SCS=y so SCS vs PAC is hardware
selectable.
- CONFIG_X86_KERNEL_IBT=y while a default, just be sure.
- CONFIG_CFI_CLANG=y globally.
- CONFIG_PAGE_TABLE_CHECK=y for userspace mapping sanity.
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20240501193709.make.982-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'kernel/configs')
| -rw-r--r-- | kernel/configs/hardening.config | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/configs/hardening.config b/kernel/configs/hardening.config index 7a5bbfc024b7..47e6564129c3 100644 --- a/kernel/configs/hardening.config +++ b/kernel/configs/hardening.config @@ -23,6 +23,10 @@ CONFIG_SLAB_FREELIST_HARDENED=y CONFIG_SHUFFLE_PAGE_ALLOCATOR=y CONFIG_RANDOM_KMALLOC_CACHES=y +# Sanity check userspace page table mappings. +CONFIG_PAGE_TABLE_CHECK=y +CONFIG_PAGE_TABLE_CHECK_ENFORCED=y + # Randomize kernel stack offset on syscall entry. CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y @@ -81,6 +85,10 @@ CONFIG_SECCOMP_FILTER=y # Provides some protections against SYN flooding. CONFIG_SYN_COOKIES=y +# Enable Kernel Control Flow Integrity (currently Clang only). +CONFIG_CFI_CLANG=y +# CONFIG_CFI_PERMISSIVE is not set + # Attack surface reduction: do not autoload TTY line disciplines. # CONFIG_LDISC_AUTOLOAD is not set |