IBM vTPM driver lacks a call to tpm2_sessions_init() and reports:
[ 2.987131] tpm tpm0: tpm2_load_context: failed with a TPM error 0x01C4
[ 2.987140] ima: Error Communicating to TPM chip, result: -14
HMAC encryption code also has a risk of null derefence, given that when
uninitialized, chip->auth is a null pointer.
Limit TCG_TPM2_HMAC to known good drivers until these issues have been
properly fixed.
Cc: stable@xxxxxxxxxxxxxxx # v6.10+
Fixes: d2add27cf2b8 ("tpm: Add NULL primary creation")
Reported-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Closes: https://lore.kernel.org/linux-integrity/20240617193408.1234365-1-stefanb@xxxxxxxxxxxxx/
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
---
drivers/char/tpm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index cf0be8a7939d..c310588a5958 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -30,6 +30,7 @@ if TCG_TPM
config TCG_TPM2_HMAC
bool "Use HMAC and encrypted transactions on the TPM bus"
default X86_64
+ depends on TCG_CRB || TCG_TIS_CORE
select CRYPTO_ECDH
select CRYPTO_LIB_AESCFB
select CRYPTO_LIB_SHA256
--
2.45.2
