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SubjectRe: [PATCH] security: Fix IMA Kconfig for dependencies on ARM64
On Tue, Mar 06, 2018 at 11:26:26PM -0600, Jiandi An wrote:
> TPM_CRB driver is the TPM support for ARM64. If it
> is built as module, TPM chip is registered after IMA
> init. tpm_pcr_read() in IMA driver would fail and
> display the following message even though eventually
> there is TPM chip on the system:
>
> ima: No TPM chip found, activating TPM-bypass! (rc=-19)
>
> Fix IMA Kconfig to select TPM_CRB so TPM_CRB driver is
> built in kernel and initializes before IMA driver.
>
> Signed-off-by: Jiandi An <anjiandi@codeaurora.org>
> security/integrity/ima/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
> index 35ef693..6a8f677 100644
> +++ b/security/integrity/ima/Kconfig
> @@ -10,6 +10,7 @@ config IMA
> select CRYPTO_HASH_INFO
> select TCG_TPM if HAS_IOMEM && !UML
> select TCG_TIS if TCG_TPM && X86
> + select TCG_CRB if TCG_TPM && ACPI
> select TCG_IBMVTPM if TCG_TPM && PPC_PSERIES
> help
> The Trusted Computing Group(TCG) runtime Integrity

This seems really weird, why are any specific TPM drivers linked to
IMA config, we have lots of drivers..

I don't think I've ever seen this pattern in Kconfig before?

Jason

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