Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2008 IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Author: Mimi Zohar <zohar@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * File: integrity_audit.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *	Audit calls for the integrity subsystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "integrity.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static int integrity_audit_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* ima_audit_setup - enable informational auditing messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int __init integrity_audit_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	unsigned long audit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	if (!kstrtoul(str, 0, &audit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		integrity_audit_info = audit ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) __setup("integrity_audit=", integrity_audit_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) void integrity_audit_msg(int audit_msgno, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 			 const unsigned char *fname, const char *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			 const char *cause, int result, int audit_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	integrity_audit_message(audit_msgno, inode, fname, op, cause,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 				result, audit_info, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void integrity_audit_message(int audit_msgno, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 			     const unsigned char *fname, const char *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			     const char *cause, int result, int audit_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			     int errno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	struct audit_buffer *ab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	char name[TASK_COMM_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (!integrity_audit_info && audit_info == 1)	/* Skip info messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (!ab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			 task_pid_nr(current),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			 from_kuid(&init_user_ns, current_uid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			 from_kuid(&init_user_ns, audit_get_loginuid(current)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			 audit_get_sessionid(current));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	audit_log_task_context(ab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	audit_log_format(ab, " op=%s cause=%s comm=", op, cause);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	audit_log_untrustedstring(ab, get_task_comm(name, current));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	if (fname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		audit_log_format(ab, " name=");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		audit_log_untrustedstring(ab, fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	if (inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		audit_log_format(ab, " dev=");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		audit_log_untrustedstring(ab, inode->i_sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		audit_log_format(ab, " ino=%lu", inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	audit_log_format(ab, " res=%d errno=%d", !result, errno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	audit_log_end(ab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }