linux-kernel - [PATCH] security/integrity: Include __func_

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Date:   Wed, 29 Jan 2020 19:01:29 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     jmorris@...ei.org, serge@...lyn.com, mpe@...erman.id.au,
        zohar@...ux.ibm.com, erichte@...ux.ibm.com, nayna@...ux.ibm.com,
        yuehaibing@...wei.com
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] security/integrity: Include __func__ in messages for easier debug

Change messages to messages to make it easier to debug. The following
error message isn't informative enough to figure out what failed.

Couldn't get size: 0x800000000000000e

Change messages to include function information.

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 .../integrity/platform_certs/load_powerpc.c     | 14 ++++++++------
 security/integrity/platform_certs/load_uefi.c   | 17 ++++++++++-------
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/security/integrity/platform_certs/load_powerpc.c b/security/integrity/platform_certs/load_powerpc.c
index a2900cb85357..621454148fbc 100644
--- a/security/integrity/platform_certs/load_powerpc.c
+++ b/security/integrity/platform_certs/load_powerpc.c
@@ -25,7 +25,7 @@ static __init void *get_cert_list(u8 *key, unsigned long keylen, uint64_t *size)
 
 	rc = secvar_ops->get(key, keylen, NULL, size);
 	if (rc) {
-		pr_err("Couldn't get size: %d\n", rc);
+		pr_err("%s: Couldn't get size: %d\n", __func__, rc);
 		return NULL;
 	}
 
@@ -36,7 +36,7 @@ static __init void *get_cert_list(u8 *key, unsigned long keylen, uint64_t *size)
 	rc = secvar_ops->get(key, keylen, db, size);
 	if (rc) {
 		kfree(db);
-		pr_err("Error reading %s var: %d\n", key, rc);
+		pr_err("%s: Error reading %s var: %d\n", __func__, key, rc);
 		return NULL;
 	}
 
@@ -69,23 +69,25 @@ static int __init load_powerpc_certs(void)
 	 */
 	db = get_cert_list("db", 3, &dbsize);
 	if (!db) {
-		pr_err("Couldn't get db list from firmware\n");
+		pr_err("%s: Couldn't get db list from firmware\n", __func__);
 	} else {
 		rc = parse_efi_signature_list("powerpc:db", db, dbsize,
 					      get_handler_for_db);
 		if (rc)
-			pr_err("Couldn't parse db signatures: %d\n", rc);
+			pr_err("%s: Couldn't parse db signatures: %d\n",
+				__func__, rc);
 		kfree(db);
 	}
 
 	dbx = get_cert_list("dbx", 4,  &dbxsize);
 	if (!dbx) {
-		pr_info("Couldn't get dbx list from firmware\n");
+		pr_info("%s: Couldn't get dbx list from firmware\n", __func__);
 	} else {
 		rc = parse_efi_signature_list("powerpc:dbx", dbx, dbxsize,
 					      get_handler_for_dbx);
 		if (rc)
-			pr_err("Couldn't parse dbx signatures: %d\n", rc);
+			pr_err("%s: Couldn't parse dbx signatures: %d\n",
+				__func__, rc);
 		kfree(dbx);
 	}
 
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index 111898aad56e..c3cf6575abc1 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -44,7 +44,7 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 
 	status = efi.get_variable(name, guid, NULL, &lsize, &tmpdb);
 	if (status != EFI_BUFFER_TOO_SMALL) {
-		pr_err("Couldn't get size: 0x%lx\n", status);
+		pr_err("%s: Couldn't get size: 0x%lx\n", __func__, status);
 		return NULL;
 	}
 
@@ -55,7 +55,7 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 	status = efi.get_variable(name, guid, NULL, &lsize, db);
 	if (status != EFI_SUCCESS) {
 		kfree(db);
-		pr_err("Error reading db var: 0x%lx\n", status);
+		pr_err("%s: Error reading db var: 0x%lx\n", __func__, status);
 		return NULL;
 	}
 
@@ -85,13 +85,14 @@ static int __init load_uefi_certs(void)
 	if (!uefi_check_ignore_db()) {
 		db = get_cert_list(L"db", &secure_var, &dbsize);
 		if (!db) {
-			pr_err("MODSIGN: Couldn't get UEFI db list\n");
+			pr_err("%s: MODSIGN: Couldn't get UEFI db list\n",
+				__func__);
 		} else {
 			rc = parse_efi_signature_list("UEFI:db",
 					db, dbsize, get_handler_for_db);
 			if (rc)
-				pr_err("Couldn't parse db signatures: %d\n",
-				       rc);
+				pr_err("%s: Couldn't parse db signatures: %d\n",
+				       __func__, rc);
 			kfree(db);
 		}
 	}
@@ -103,7 +104,8 @@ static int __init load_uefi_certs(void)
 		rc = parse_efi_signature_list("UEFI:MokListRT",
 					      mok, moksize, get_handler_for_db);
 		if (rc)
-			pr_err("Couldn't parse MokListRT signatures: %d\n", rc);
+			pr_err("%s: Couldn't parse MokListRT signatures: %d\n",
+				__func__, rc);
 		kfree(mok);
 	}
 
@@ -115,7 +117,8 @@ static int __init load_uefi_certs(void)
 					      dbx, dbxsize,
 					      get_handler_for_dbx);
 		if (rc)
-			pr_err("Couldn't parse dbx signatures: %d\n", rc);
+			pr_err("%s: Couldn't parse dbx signatures: %d\n",
+				__func__, rc);
 		kfree(dbx);
 	}
 
-- 
2.20.1