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
15static int integrity_audit_info;
16
17/* ima_audit_setup - enable informational auditing messages */
18static int __init integrity_audit_setup(char *str)
19{
20 unsigned long audit;
21
22 if (!kstrtoul(s: str, base: 0, res: &audit))
23 integrity_audit_info = audit ? 1 : 0;
24 return 1;
25}
26__setup("integrity_audit=", integrity_audit_setup);
27
28void 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, info: audit_info, errno: 0);
34}
35
36void 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(ctx: audit_context(), GFP_KERNEL, type: audit_msgno);
48 if (!ab)
49 return;
50 audit_log_format(ab, fmt: "pid=%d uid=%u auid=%u ses=%u",
51 task_pid_nr(current),
52 from_kuid(to: &init_user_ns, current_uid()),
53 from_kuid(to: &init_user_ns, kuid: audit_get_loginuid(current)),
54 audit_get_sessionid(current));
55 audit_log_task_context(ab);
56 audit_log_format(ab, fmt: " 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, fmt: " name=");
60 audit_log_untrustedstring(ab, string: fname);
61 }
62 if (inode) {
63 audit_log_format(ab, fmt: " dev=");
64 audit_log_untrustedstring(ab, string: inode->i_sb->s_id);
65 audit_log_format(ab, fmt: " ino=%lu", inode->i_ino);
66 }
67 audit_log_format(ab, fmt: " res=%d errno=%d", !result, errno);
68 audit_log_end(ab);
69}
70