1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2008 IBM Corporation
4 * Author: Mimi Zohar <zohar@us.ibm.com>
5 *
6 * File: integrity_audit.c
7 * Audit calls for the integrity subsystem
8 */
9
10 #include <linux/fs.h>
11 #include <linux/gfp.h>
12 #include <linux/audit.h>
13 #include "integrity.h"
14
15 static int integrity_audit_info;
16
17 /* ima_audit_setup - enable informational auditing messages */
integrity_audit_setup(char * str)18 static int __init integrity_audit_setup(char *str)
19 {
20 unsigned long audit;
21
22 if (!kstrtoul(str, 0, &audit))
23 integrity_audit_info = audit ? 1 : 0;
24 return 1;
25 }
26 __setup("integrity_audit=", integrity_audit_setup);
27
integrity_audit_msg(int audit_msgno,struct inode * inode,const unsigned char * fname,const char * op,const char * cause,int result,int audit_info)28 void integrity_audit_msg(int audit_msgno, struct inode *inode,
29 const unsigned char *fname, const char *op,
30 const char *cause, int result, int audit_info)
31 {
32 integrity_audit_message(audit_msgno, inode, fname, op, cause,
33 result, audit_info, 0);
34 }
35
integrity_audit_message(int audit_msgno,struct inode * inode,const unsigned char * fname,const char * op,const char * cause,int result,int audit_info,int errno)36 void integrity_audit_message(int audit_msgno, struct inode *inode,
37 const unsigned char *fname, const char *op,
38 const char *cause, int result, int audit_info,
39 int errno)
40 {
41 struct audit_buffer *ab;
42 char name[TASK_COMM_LEN];
43
44 if (!integrity_audit_info && audit_info == 1) /* Skip info messages */
45 return;
46
47 ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
48 if (!ab)
49 return;
50 audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
51 task_pid_nr(current),
52 from_kuid(&init_user_ns, current_uid()),
53 from_kuid(&init_user_ns, audit_get_loginuid(current)),
54 audit_get_sessionid(current));
55 audit_log_task_context(ab);
56 audit_log_format(ab, " op=%s cause=%s comm=", op, cause);
57 audit_log_untrustedstring(ab, get_task_comm(name, current));
58 if (fname) {
59 audit_log_format(ab, " name=");
60 audit_log_untrustedstring(ab, fname);
61 }
62 if (inode) {
63 audit_log_format(ab, " dev=");
64 audit_log_untrustedstring(ab, inode->i_sb->s_id);
65 audit_log_format(ab, " ino=%lu", inode->i_ino);
66 }
67 audit_log_format(ab, " res=%d errno=%d", !result, errno);
68 audit_log_end(ab);
69 }
70