Re: [PATCH] security/integrity: Include __func__ in messages for easier debug

[Joe Perches <joe@perches.com>]

On Wed, 2020-01-29 at 19:01 -0700, Shuah Khan wrote:
> Change messages to messages to make it easier to debug. The following
> error message isn't informative enough to figure out what failed.
> Change messages to include function information.
> 
> Signed-off-by: Shuah Khan <skhan@linuxfoundation.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

perhaps instead add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
so all the pr_<level> logging is more specific.

This would prefix all pr_<level> output with "integrity: "

3integrity: Couldn't get size: 0x%lx
3integrity: Error reading db var: 0x%lx
3integrity: MODSIGN: Couldn't get UEFI db list
3integrity: Couldn't parse db signatures: %d
6integrity: Couldn't get UEFI MokListRT
3integrity: Couldn't parse MokListRT signatures: %d
6integrity: Couldn't get UEFI dbx list
3integrity: Couldn't parse dbx signatures: %d

5integrity: Platform Keyring initialized
6integrity: Error adding keys to platform keyring %s

---
 security/integrity/platform_certs/load_powerpc.c     | 3 +++
 security/integrity/platform_certs/load_uefi.c        | 2 ++
 security/integrity/platform_certs/platform_keyring.c | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/security/integrity/platform_certs/load_powerpc.c b/security/integrity/platform_certs/load_powerpc.c
index a2900c..5cfbd0 100644
--- a/security/integrity/platform_certs/load_powerpc.c
+++ b/security/integrity/platform_certs/load_powerpc.c
@@ -5,6 +5,9 @@
  *
  *      - loads keys and hashes stored and controlled by the firmware.
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/cred.h>
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index 111898a..480450a 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/cred.h>
diff --git a/security/integrity/platform_certs/platform_keyring.c b/security/integrity/platform_certs/platform_keyring.c
index 7646e35..9bd2846 100644
--- a/security/integrity/platform_certs/platform_keyring.c
+++ b/security/integrity/platform_certs/platform_keyring.c
@@ -6,6 +6,8 @@
  * Author(s): Nayna Jain <nayna@linux.ibm.com>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>