gentoo-overlay/dev-libs/libtpms/files/libtpms-0.7.0-tpm12-Initialize-some-variables-for-gcc.patch

From aab357515eda564500290a4b3f542d2b4609af4f Mon Sep 17 00:00:00 2001
From: Stefan Berger <stefanb@linux.ibm.com>
Date: Tue, 14 Jan 2020 18:05:06 -0500
Subject: [PATCH] tpm12: Initialize some variables for gcc ppc64el compiler
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gcc (Ubuntu 9.2.1-21ubuntu1) 9.2.1 20191130

The gcc compiler on Ubuntu Focal reports several false positives for
potentially uninitialized variables:

tpm12/tpm_session.c: In function ‘TPM_Process_SaveContext’:
tpm12/tpm_session.c:3229:19: error: ‘tpm_auth_session_data’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 3229 |      returnCode = TPM_AuthSessionData_Store(&r1ContextSensitive, tpm_auth_session_data);
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tpm12/tpm_delegate.c: In function ‘TPM_Process_DelegateManage’:
tpm12/tpm_delegate.c:1787:49: error: ‘familyRow’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 1787 |  if ((opCode != TPM_FAMILY_CREATE) && (familyRow->flags & TPM_DELEGATE_ADMIN_LOCK)) {
      |                                        ~~~~~~~~~^~~~~~~
tpm12/tpm_delegate.c: In function ‘TPM_Process_DelegateUpdateVerification’:
tpm12/tpm_delegate.c:3575:48: error: ‘d1DelegateTableRow’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 3575 |      d1DelegateTableRow->pub.verificationCount = familyRow->verificationCount;
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

All of the variables are initialize under the same condition as they are
accessed.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 src/tpm12/tpm_delegate.c | 4 ++--
 src/tpm12/tpm_session.c  | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/tpm12/tpm_delegate.c b/src/tpm12/tpm_delegate.c
index 51d12f3..37ebc02 100644
--- a/src/tpm12/tpm_delegate.c
+++ b/src/tpm12/tpm_delegate.c
@@ -1629,7 +1629,7 @@ TPM_RESULT TPM_Process_DelegateManage(tpm_state_t *tpm_state,
     TPM_SECRET			*hmacKey;
     TPM_SECRET			savedAuth;		/* saved copy for response */
     TPM_DELEGATE_PUBLIC		*delegatePublic;	/* from DSAP session */
-    TPM_FAMILY_TABLE_ENTRY	*familyRow;		/* family table row containing familyID */
+    TPM_FAMILY_TABLE_ENTRY	*familyRow = NULL;	/* family table row containing familyID */
     uint32_t			nv1 = tpm_state->tpm_permanent_data.noOwnerNVWrite;
 							/* temp for noOwnerNVWrite, initialize to
 							   silence compiler */
@@ -3360,7 +3360,7 @@ TPM_RESULT TPM_Process_DelegateUpdateVerification(tpm_state_t *tpm_state,
     TPM_DELEGATE_INDEX		d1DelegateIndex;
     TPM_DELEGATE_OWNER_BLOB	d1DelegateOwnerBlob;
     TPM_DELEGATE_KEY_BLOB	d1DelegateKeyBlob;
-    TPM_DELEGATE_TABLE_ROW	*d1DelegateTableRow;
+    TPM_DELEGATE_TABLE_ROW	*d1DelegateTableRow = NULL;
     TPM_FAMILY_ID		familyID = 0;
     TPM_FAMILY_TABLE_ENTRY	*familyRow;		/* family table row containing familyID */
     TPM_DELEGATE_PUBLIC		*delegatePublic;	/* from DSAP session */
diff --git a/src/tpm12/tpm_session.c b/src/tpm12/tpm_session.c
index 5e7b708..15b977f 100644
--- a/src/tpm12/tpm_session.c
+++ b/src/tpm12/tpm_session.c
@@ -3044,7 +3044,7 @@ TPM_RESULT TPM_Process_SaveContext(tpm_state_t *tpm_state,
     TPM_STORE_BUFFER		b1_sbuffer;		/* serialization of b1 */
     TPM_STCLEAR_DATA		*v1StClearData = NULL;
     TPM_KEY_HANDLE_ENTRY	*tpm_key_handle_entry;	/* key table entry for the handle */
-    TPM_AUTH_SESSION_DATA	*tpm_auth_session_data; /* session table entry for the handle */
+    TPM_AUTH_SESSION_DATA	*tpm_auth_session_data = NULL; /* session table entry for the handle */
     TPM_TRANSPORT_INTERNAL	*tpm_transport_internal; /* transport table entry for the handle */
     TPM_DAA_SESSION_DATA	*tpm_daa_session_data;	/* daa session table entry for the handle */
     TPM_NONCE			*n1ContextNonce = NULL;
-- 
2.26.2