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Linux/security/integrity/integrity_audit.c

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  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/gfp.h>
 15 #include <linux/audit.h>
 16 #include "integrity.h"
 17 
 18 static int integrity_audit_info;
 19 
 20 /* ima_audit_setup - enable informational auditing messages */
 21 static int __init integrity_audit_setup(char *str)
 22 {
 23         unsigned long audit;
 24 
 25         if (!kstrtoul(str, 0, &audit))
 26                 integrity_audit_info = audit ? 1 : 0;
 27         return 1;
 28 }
 29 __setup("integrity_audit=", integrity_audit_setup);
 30 
 31 void integrity_audit_msg(int audit_msgno, struct inode *inode,
 32                          const unsigned char *fname, const char *op,
 33                          const char *cause, int result, int audit_info)
 34 {
 35         struct audit_buffer *ab;
 36         char name[TASK_COMM_LEN];
 37 
 38         if (!integrity_audit_info && audit_info == 1)   /* Skip info messages */
 39                 return;
 40 
 41         ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
 42         audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
 43                          task_pid_nr(current),
 44                          from_kuid(&init_user_ns, current_cred()->uid),
 45                          from_kuid(&init_user_ns, 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, get_task_comm(name, current));
 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=");
 60                 audit_log_untrustedstring(ab, inode->i_sb->s_id);
 61                 audit_log_format(ab, " ino=%lu", inode->i_ino);
 62         }
 63         audit_log_format(ab, " res=%d", !result);
 64         audit_log_end(ab);
 65 }
 66 

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