Re: [PATCH 7/9] powerpc/configs/skiroot: Enable security features
From: Daniel Axtens <hidden>
Date: 2020-01-16 05:04:51
Michael Ellerman [off-list ref] writes:
From: Joel Stanley <joel@jms.id.au> This turns on HARDENED_USERCOPY with HARDENED_USERCOPY_PAGESPAN, and FORTIFY_SOURCE. It also enables SECURITY_LOCKDOWN_LSM with _EARLY and LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY options enabled.
As I said before, this will disable xmon entirely. If we want to set this, we should compile out xmon. But if we want xmon in read-only mode to be an option, we should pick integrity mode. I don't really mind, because I don't work with skiroot very much. Oliver, Joel, Nayna, you all do stuff around this sort of level - is this a problem for any of you? Regards, Daniel
quoted hunk ↗ jump to hunk
MODULE_SIG is selected by lockdown, so it is still enabled. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> --- arch/powerpc/configs/skiroot_defconfig | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig index 24a210fe0049..bd661a9a9410 100644 --- a/arch/powerpc/configs/skiroot_defconfig +++ b/arch/powerpc/configs/skiroot_defconfig@@ -49,7 +49,6 @@ CONFIG_JUMP_LABEL=y CONFIG_STRICT_KERNEL_RWX=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y -CONFIG_MODULE_SIG=y CONFIG_MODULE_SIG_FORCE=y CONFIG_MODULE_SIG_SHA512=y CONFIG_PARTITION_ADVANCED=y@@ -272,6 +271,16 @@ CONFIG_NLS_ASCII=y CONFIG_NLS_ISO8859_1=y CONFIG_NLS_UTF8=y CONFIG_ENCRYPTED_KEYS=y +CONFIG_SECURITY=y +CONFIG_HARDENED_USERCOPY=y +# CONFIG_HARDENED_USERCOPY_FALLBACK is not set +CONFIG_HARDENED_USERCOPY_PAGESPAN=y +CONFIG_FORTIFY_SOURCE=y +CONFIG_SECURITY_LOCKDOWN_LSM=y +CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y +CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y +# CONFIG_INTEGRITY is not set +CONFIG_LSM="yama,loadpin,safesetid,integrity" # CONFIG_CRYPTO_HW is not set CONFIG_CRC16=y CONFIG_CRC_ITU_T=y-- 2.21.1