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efi_loader: Fix coverity warnings for efi tcg2 protocol 

Coverity reported 3 warnings on the current code.
CID 331856, 331855, 331854 on the latest scan.

Fix the rest of the warnings by initializing the variables before
passing them to tpm2_get_pcr_info().
In order to avoid future warnings and errors initialize them to 0 within
the function as well, since the values are always OR'ed after querying the
hardware.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Ilias Apalodimas 2021-05-26 21:01:00 +03:00 committed by Heinrich Schuchardt
parent aab8b17e94
commit 38de680e58
1 changed files with 5 additions and 2 deletions
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7
lib/efi_loader/efi_tcg2.c
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@ -403,6 +403,9 @@ static int tpm2_get_pcr_info(struct udevice *dev, u32 *supported_pcr,
size_t i;
int tpm_ret;
*supported_pcr = 0;
*active_pcr = 0;
*pcr_banks = 0;
memset(response, 0, sizeof(response));
ret = tpm2_get_capability(dev, TPM2_CAP_PCRS, 0, response, 1);
if (ret)
@ -481,7 +484,7 @@ out:
static efi_status_t __get_active_pcr_banks(u32 *active_pcr_banks)
{
struct udevice *dev;
u32 active, supported, pcr_banks;
u32 active = 0, supported = 0, pcr_banks = 0;
efi_status_t ret;
int err;
@ -900,7 +903,7 @@ static efi_status_t create_specid_event(struct udevice *dev, void *buffer,
struct tcg_efi_spec_id_event *spec_event;
size_t spec_event_size;
efi_status_t ret = EFI_DEVICE_ERROR;
u32 active, supported;
u32 active = 0, supported = 0;
int err;
size_t i;