security/integrity/ima/ima_audit.c

   1 /*
   2  * Copyright (C) 2008 IBM Corporation
   3  * Author: Mimi Zohar <zohar@us.ibm.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, version 2 of the License.
   8  *
   9  * File: integrity_audit.c
  10  *      Audit calls for the integrity subsystem
  11  */
  12
  13 #include <linux/fs.h>
  14 #include <linux/audit.h>
  15 #include "ima.h"
  16
  17 static int ima_audit;
  18
  19 #ifdef CONFIG_IMA_AUDIT
  20
  21 /* ima_audit_setup - enable informational auditing messages */
  22 static int __init ima_audit_setup(char *str)
  23 {
  24         unsigned long audit;
  25
  26         if (!strict_strtoul(str, 0, &audit))
  27                 ima_audit = audit ? 1 : 0;
  28         return 1;
  29 }
  30 __setup("ima_audit=", ima_audit_setup);
  31 #endif
  32
  33 void integrity_audit_msg(int audit_msgno, struct inode *inode,
  34                          const unsigned char *fname, const char *op,
  35                          const char *cause, int result, int audit_info)
  36 {
  37         struct audit_buffer *ab;
  38
  39         if (!ima_audit && audit_info == 1) /* Skip informational messages */
  40                 return;
  41
  42         ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
  43         audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u ses=%u",
  44                          current->pid, current_cred()->uid,
  45                          audit_get_loginuid(current),
  46                          audit_get_sessionid(current));
  47         audit_log_task_context(ab);
  48         audit_log_format(ab, " op=");
  49         audit_log_string(ab, op);
  50         audit_log_format(ab, " cause=");
  51         audit_log_string(ab, cause);
  52         audit_log_format(ab, " comm=");
  53         audit_log_untrustedstring(ab, current->comm);
  54         if (fname) {
  55                 audit_log_format(ab, " name=");
  56                 audit_log_untrustedstring(ab, fname);
  57         }
  58         if (inode)
  59                 audit_log_format(ab, " dev=%s ino=%lu",
  60                                  inode->i_sb->s_id, inode->i_ino);
  61         audit_log_format(ab, " res=%d", !result ? 0 : 1);
  62         audit_log_end(ab);
  63 }