[PATCH 2/5] efi/tpm: return -EINVAL when determining tpm final events log size fails

From: Ard Biesheuvel
Date: Wed Oct 23 2019 - 13:32:11 EST


From: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>

Currently nothing checks the return value of efi_tpm_eventlog_init,
but in case that changes in the future make sure an error is
returned when it fails to determine the tpm final events log
size.

Fixes: e658c82be556 ("efi/tpm: Only set 'efi_tpm_final_log_size' after ...")
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
drivers/firmware/efi/tpm.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c
index ebd7977653a8..31f9f0e369b9 100644
--- a/drivers/firmware/efi/tpm.c
+++ b/drivers/firmware/efi/tpm.c
@@ -88,6 +88,7 @@ int __init efi_tpm_eventlog_init(void)

if (tbl_size < 0) {
pr_err(FW_BUG "Failed to parse event in TPM Final Events Log\n");
+ ret = -EINVAL;
goto out_calc;
}

--
2.17.1