tpm: Address !chip->auth in tpm_buf_append_hmac_session*()

Unless tpm_chip_bootstrap() was called by the driver, !chip->auth can
cause a null derefence in tpm_buf_hmac_session*().  Thus, address
!chip->auth in tpm_buf_hmac_session*() and remove the fallback
implementation for !TCG_TPM2_HMAC.

Cc: [email protected] # v6.9+
Reported-by: Stefan Berger <[email protected]>
Closes: https://lore.kernel.org/linux-integrity/[email protected]/
Fixes: 1085b8276bb4 ("tpm: Add the rest of the session HMAC API")
Tested-by: Michael Ellerman <[email protected]> # ppc
Signed-off-by: Jarkko Sakkinen <[email protected]>

0 files changed, 0 insertions, 0 deletions