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powerpc: add security.config, enforcing lockdown=integrity

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It's sometimes handy to have a config that boots a bit like a system
under secure boot (forcing lockdown=integrity, without needing any
extra stuff like a command line option).

This config file allows that, and also turns on a few assorted security
and hardening options for good measure.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201203042807.1293655-1-dja@axtens.net
This commit is contained in:
Daniel Axtens 2020-12-03 15:28:07 +11:00 committed by Michael Ellerman
parent 1f69aa0b89
commit ed2bbd2b85
1 changed files with 15 additions and 0 deletions
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arch/powerpc/configs/security.config Normal file
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# This is the equivalent of booting with lockdown=integrity
CONFIG_SECURITY=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_LOCKDOWN_LSM=y
CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
CONFIG_LOCK_DOWN_KERNEL_FORCE_INTEGRITY=y
# These are some general, reasonably inexpensive hardening options
CONFIG_HARDENED_USERCOPY=y
CONFIG_FORTIFY_SOURCE=y
CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
# UBSAN bounds checking is very cheap and good for hardening
CONFIG_UBSAN=y
# CONFIG_UBSAN_MISC is not set