[XS] Change in coreboot[main]: security/tpm/tspi/log-tpm1.c: Clear whole log area on creation

[Michał Żygowski (Code Review)]

Michał Żygowski has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/84927?usp=email )

Change subject: security/tpm/tspi/log-tpm1.c: Clear whole log area on creation
......................................................................

security/tpm/tspi/log-tpm1.c: Clear whole log area on creation

The log area was not entirely cleared on creation resulting in
garbage after the last valid lgo entry. It caused the cbmem utility
to parse invalid events and access data outside the log area.
In the TPM2 log sources, the entire area is being cleared, thus the
issue has not been observed.

Change-Id: I7c780b62b1c6507e1dd1806b20b0270e364cde3d
Signed-off-by: Michał Żygowski 
---
M src/security/tpm/tspi/log-tpm1.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/27/84927/1

diff --git a/src/security/tpm/tspi/log-tpm1.c b/src/security/tpm/tspi/log-tpm1.c
index 481b569..453e74b 100644
--- a/src/security/tpm/tspi/log-tpm1.c
+++ b/src/security/tpm/tspi/log-tpm1.c
@@ -33,7 +33,7 @@
    	if (!tclt)
    		return NULL;

-		memset(tclt, 0, sizeof(*tclt));
+		memset(tclt, 0, tpm_log_len);
    	hdr = &tclt->spec_id;

/* Fill in first "header" entry. */