4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Randy Dunlap <rdun...@infradead.org>

[ Upstream commit 644f17412f5acf01a19af9d04a921937a2bc86c6 ]

UML supports HAS_IOMEM since 0bbadafdc49d (um: allow disabling
NO_IOMEM).

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 <sta...@vger.kernel.org> # v5.14+
Signed-off-by: Randy Dunlap <rdun...@infradead.org>
Cc: Fabio Estevam <feste...@gmail.com>
Cc: Richard Weinberger <rich...@nod.at>
Cc: Anton Ivanov <anton.iva...@cambridgegreys.com>
Cc: Johannes Berg <johan...@sipsolutions.net>
Cc: linux-um@lists.infradead.org
Signed-off-by: Mimi Zohar <zo...@linux.ibm.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 security/integrity/ima/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index 3ec45028a8c54..cd32fe3311afe 100644
--- 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
-- 
2.40.1




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