|
 |
00e791 |
From 6fd8db6bb3b23b9e41f109135253f77263071f46 Mon Sep 17 00:00:00 2001
|
|
|
00e791 |
From: Chris Coulson <chris.coulson@canonical.com>
|
|
|
00e791 |
Date: Sat, 22 Jun 2019 15:33:03 +0100
|
|
|
00e791 |
Subject: [PATCH 37/62] tpm: Fix off-by-one error when calculating event size
|
|
|
00e791 |
|
|
|
00e791 |
tpm_log_event_raw() allocates a buffer for the EFI_TCG2_EVENT structure
|
|
|
00e791 |
that is one byte larger than necessary, and sets event->Size accordingly.
|
|
|
00e791 |
The result of this is that the event data recorded in the log differs
|
|
|
00e791 |
from the data that is measured to the TPM (it has an extra zero byte
|
|
|
00e791 |
at the end).
|
|
|
00e791 |
|
|
|
00e791 |
Upstream-commit-id: 8a27a4809a6
|
|
|
00e791 |
---
|
|
|
00e791 |
tpm.c | 6 ++++--
|
|
|
00e791 |
1 file changed, 4 insertions(+), 2 deletions(-)
|
|
|
00e791 |
|
|
|
00e791 |
diff --git a/tpm.c b/tpm.c
|
|
|
00e791 |
index f07362c70bb..516fb876caa 100644
|
|
|
00e791 |
--- a/tpm.c
|
|
|
00e791 |
+++ b/tpm.c
|
|
|
00e791 |
@@ -131,8 +131,10 @@ static EFI_STATUS tpm_log_event_raw(EFI_PHYSICAL_ADDRESS buf, UINTN size,
|
|
|
00e791 |
#endif
|
|
|
00e791 |
} else if (tpm2) {
|
|
|
00e791 |
EFI_TCG2_EVENT *event;
|
|
|
00e791 |
+ UINTN event_size = sizeof(*event) - sizeof(event->Event) +
|
|
|
00e791 |
+ logsize;
|
|
|
00e791 |
|
|
|
00e791 |
- event = AllocatePool(sizeof(*event) + logsize);
|
|
|
00e791 |
+ event = AllocatePool(event_size);
|
|
|
00e791 |
if (!event) {
|
|
|
00e791 |
perror(L"Unable to allocate event structure\n");
|
|
|
00e791 |
return EFI_OUT_OF_RESOURCES;
|
|
|
00e791 |
@@ -142,7 +144,7 @@ static EFI_STATUS tpm_log_event_raw(EFI_PHYSICAL_ADDRESS buf, UINTN size,
|
|
|
00e791 |
event->Header.HeaderVersion = 1;
|
|
|
00e791 |
event->Header.PCRIndex = pcr;
|
|
|
00e791 |
event->Header.EventType = type;
|
|
|
00e791 |
- event->Size = sizeof(*event) - sizeof(event->Event) + logsize + 1;
|
|
|
00e791 |
+ event->Size = event_size;
|
|
|
00e791 |
CopyMem(event->Event, (VOID *)log, logsize);
|
|
|
00e791 |
if (hash) {
|
|
|
00e791 |
/* TPM 2 systems will generate the appropriate hash
|
|
|
00e791 |
--
|
|
|
00e791 |
2.26.2
|
|
|
00e791 |
|