[PATCH 4.19 007/191] IMA: allow/fix UML builds

[Geert Uytterhoeven]

Hi Greg,

On Mon, May 15, 2023 at 6:39 PM Greg Kroah-Hartman
<gregkh at linuxfoundation.org> wrote:
> From: Randy Dunlap <rdunlap at infradead.org>
>
> commit 644f17412f5acf01a19af9d04a921937a2bc86c6 upstream.
>
> UML supports HAS_IOMEM since 0bbadafdc49d (um: allow disabling
> NO_IOMEM).

0bbadafdc49d is in v5.14.
Was it backported to older versions?

>
> Current IMA build on UML fails on allmodconfig (with TCG_TPM=m):
>
> ld: security/integrity/ima/ima_queue.o: in function `ima_add_template_entry':
> ima_queue.c:(.text+0x2d9): undefined reference to `tpm_pcr_extend'
> ld: security/integrity/ima/ima_init.o: in function `ima_init':
> ima_init.c:(.init.text+0x43f): undefined reference to `tpm_default_chip'
> ld: security/integrity/ima/ima_crypto.o: in function `ima_calc_boot_aggregate_tfm':
> ima_crypto.c:(.text+0x1044): undefined reference to `tpm_pcr_read'
> ld: ima_crypto.c:(.text+0x10d8): undefined reference to `tpm_pcr_read'
>
> Modify the IMA Kconfig entry so that it selects TCG_TPM if HAS_IOMEM
> is set, regardless of the UML Kconfig setting.
> This updates TCG_TPM from =m to =y and fixes the linker errors.
>
> Fixes: f4a0391dfa91 ("ima: fix Kconfig dependencies")
> Cc: Stable <stable at vger.kernel.org> # v5.14+

"v5.14+"

> Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Richard Weinberger <richard at nod.at>
> Cc: Anton Ivanov <anton.ivanov at cambridgegreys.com>
> Cc: Johannes Berg <johannes at sipsolutions.net>
> Cc: linux-um at lists.infradead.org
> Signed-off-by: Mimi Zohar <zohar at linux.ibm.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> ---
>  security/integrity/ima/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/security/integrity/ima/Kconfig
> +++ b/security/integrity/ima/Kconfig
> @@ -7,7 +7,7 @@ config IMA
>         select CRYPTO_HMAC
>         select CRYPTO_SHA1
>         select CRYPTO_HASH_INFO
> -       select TCG_TPM if HAS_IOMEM && !UML
> +       select TCG_TPM if HAS_IOMEM
>         select TCG_TIS if TCG_TPM && X86
>         select TCG_CRB if TCG_TPM && ACPI
>         select TCG_IBMVTPM if TCG_TPM && PPC_PSERIES

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds