Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * security/tomoyo/audit.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2005-2011  NTT DATA CORPORATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include "common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * tomoyo_print_bprm - Print "struct linux_binprm" for auditing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * @bprm: Pointer to "struct linux_binprm".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * @dump: Pointer to "struct tomoyo_page_dump".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * Returns the contents of @bprm on success, NULL otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * This function uses kzalloc(), so caller must kfree() if this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * didn't return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static char *tomoyo_print_bprm(struct linux_binprm *bprm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 			       struct tomoyo_page_dump *dump)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	static const int tomoyo_buffer_len = 4096 * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	char *buffer = kzalloc(tomoyo_buffer_len, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	char *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	char *last_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	unsigned long pos = bprm->p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	int offset = pos % PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	int argv_count = bprm->argc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	int envp_count = bprm->envc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	bool truncated = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	len = snprintf(buffer, tomoyo_buffer_len - 1, "argv[]={ ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	cp = buffer + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (!argv_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		memmove(cp, "} envp[]={ ", 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		cp += 11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	last_start = cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	while (argv_count || envp_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		if (!tomoyo_dump_page(bprm, pos, dump))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		pos += PAGE_SIZE - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		/* Read. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		while (offset < PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			const char *kaddr = dump->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			const unsigned char c = kaddr[offset++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			if (cp == last_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 				*cp++ = '"';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 			if (cp >= buffer + tomoyo_buffer_len - 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 				/* Reserve some room for "..." string. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 				truncated = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			} else if (c == '\\') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 				*cp++ = '\\';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 				*cp++ = '\\';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			} else if (c > ' ' && c < 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 				*cp++ = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			} else if (!c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 				*cp++ = '"';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 				*cp++ = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 				last_start = cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 				*cp++ = '\\';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				*cp++ = (c >> 6) + '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 				*cp++ = ((c >> 3) & 7) + '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				*cp++ = (c & 7) + '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			if (c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			if (argv_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 				if (--argv_count == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 					if (truncated) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 						cp = last_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 						memmove(cp, "... ", 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 						cp += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 					memmove(cp, "} envp[]={ ", 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 					cp += 11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 					last_start = cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 					truncated = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			} else if (envp_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 				if (--envp_count == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 					if (truncated) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 						cp = last_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 						memmove(cp, "... ", 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 						cp += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			if (!argv_count && !envp_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	*cp++ = '}';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	*cp = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	snprintf(buffer, tomoyo_buffer_len - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		 "argv[]={ ... } envp[]= { ... }");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  * tomoyo_filetype - Get string representation of file type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  * @mode: Mode value for stat().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  * Returns file type string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static inline const char *tomoyo_filetype(const umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	switch (mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	case S_IFREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FILE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	case S_IFDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_DIRECTORY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	case S_IFLNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SYMLINK];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	case S_IFIFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FIFO];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	case S_IFSOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SOCKET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	case S_IFBLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_BLOCK_DEV];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	case S_IFCHR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		return tomoyo_condition_keyword[TOMOYO_TYPE_IS_CHAR_DEV];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return "unknown"; /* This should not happen. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  * tomoyo_print_header - Get header line of audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)  * @r: Pointer to "struct tomoyo_request_info".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  * Returns string representation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  * This function uses kmalloc(), so caller must kfree() if this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * didn't return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static char *tomoyo_print_header(struct tomoyo_request_info *r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct tomoyo_time stamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	const pid_t gpid = task_pid_nr(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct tomoyo_obj_info *obj = r->obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	static const int tomoyo_buffer_len = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	int pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	u8 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	tomoyo_convert_time(ktime_get_real_seconds(), &stamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	pos = snprintf(buffer, tomoyo_buffer_len - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		       "#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s granted=%s (global-pid=%u) task={ pid=%u ppid=%u uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		       stamp.year, stamp.month, stamp.day, stamp.hour,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		       stamp.min, stamp.sec, r->profile, tomoyo_mode[r->mode],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		       tomoyo_yesno(r->granted), gpid, tomoyo_sys_getpid(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		       tomoyo_sys_getppid(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		       from_kuid(&init_user_ns, current_uid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		       from_kgid(&init_user_ns, current_gid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		       from_kuid(&init_user_ns, current_euid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		       from_kgid(&init_user_ns, current_egid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		       from_kuid(&init_user_ns, current_suid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		       from_kgid(&init_user_ns, current_sgid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		       from_kuid(&init_user_ns, current_fsuid()),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		       from_kgid(&init_user_ns, current_fsgid()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (!obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		goto no_obj_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (!obj->validate_done) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		tomoyo_get_attributes(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		obj->validate_done = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	for (i = 0; i < TOMOYO_MAX_PATH_STAT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		struct tomoyo_mini_stat *stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		unsigned int dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		umode_t mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (!obj->stat_valid[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		stat = &obj->stat[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		dev = stat->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		mode = stat->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		if (i & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			pos += snprintf(buffer + pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 					tomoyo_buffer_len - 1 - pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 					" path%u.parent={ uid=%u gid=%u ino=%lu perm=0%o }",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 					(i >> 1) + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 					from_kuid(&init_user_ns, stat->uid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 					from_kgid(&init_user_ns, stat->gid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					(unsigned long)stat->ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 					stat->mode & S_IALLUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 				" path%u={ uid=%u gid=%u ino=%lu major=%u minor=%u perm=0%o type=%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				(i >> 1) + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 				from_kuid(&init_user_ns, stat->uid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 				from_kgid(&init_user_ns, stat->gid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				(unsigned long)stat->ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				MAJOR(dev), MINOR(dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 				mode & S_IALLUGO, tomoyo_filetype(mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (S_ISCHR(mode) || S_ISBLK(mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			dev = stat->rdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			pos += snprintf(buffer + pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 					tomoyo_buffer_len - 1 - pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 					" dev_major=%u dev_minor=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 					MAJOR(dev), MINOR(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 				" }");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) no_obj_info:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (pos < tomoyo_buffer_len - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * tomoyo_init_log - Allocate buffer for audit logs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * @r:    Pointer to "struct tomoyo_request_info".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  * @len:  Buffer size needed for @fmt and @args.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * @fmt:  The printf()'s format string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  * @args: va_list structure for @fmt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * Returns pointer to allocated memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  * This function uses kzalloc(), so caller must kfree() if this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  * didn't return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		      va_list args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	char *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	char *bprm_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	const char *header = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	char *realpath = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	const char *symlink = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	int pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	const char *domainname = r->domain->domainname->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	header = tomoyo_print_header(r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (!header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	/* +10 is for '\n' etc. and '\0'. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	len += strlen(domainname) + strlen(header) + 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	if (r->ee) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		struct file *file = r->ee->bprm->file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		realpath = tomoyo_realpath_from_path(&file->f_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		bprm_info = tomoyo_print_bprm(r->ee->bprm, &r->ee->dump);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		if (!realpath || !bprm_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		/* +80 is for " exec={ realpath=\"%s\" argc=%d envc=%d %s }" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		len += strlen(realpath) + 80 + strlen(bprm_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	} else if (r->obj && r->obj->symlink_target) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		symlink = r->obj->symlink_target->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		/* +18 is for " symlink.target=\"%s\"" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		len += 18 + strlen(symlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	len = tomoyo_round2(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	buf = kzalloc(len, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	pos = snprintf(buf, len, "%s", header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	if (realpath) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		struct linux_binprm *bprm = r->ee->bprm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		pos += snprintf(buf + pos, len - pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 				" exec={ realpath=\"%s\" argc=%d envc=%d %s }",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 				realpath, bprm->argc, bprm->envc, bprm_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	} else if (symlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		pos += snprintf(buf + pos, len - pos, " symlink.target=\"%s\"",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 				symlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	vsnprintf(buf + pos, len - pos, fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	kfree(realpath);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	kfree(bprm_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	kfree(header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	return buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* Wait queue for /sys/kernel/security/tomoyo/audit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static DECLARE_WAIT_QUEUE_HEAD(tomoyo_log_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* Structure for audit log. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) struct tomoyo_log {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	char *log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* The list for "struct tomoyo_log". */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static LIST_HEAD(tomoyo_log);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* Lock for "struct list_head tomoyo_log". */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static DEFINE_SPINLOCK(tomoyo_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* Length of "stuct list_head tomoyo_log". */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static unsigned int tomoyo_log_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)  * tomoyo_get_audit - Get audit mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)  * @ns:          Pointer to "struct tomoyo_policy_namespace".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)  * @profile:     Profile number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)  * @index:       Index number of functionality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)  * @is_granted:  True if granted log, false otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)  * Returns true if this request should be audited, false otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static bool tomoyo_get_audit(const struct tomoyo_policy_namespace *ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			     const u8 profile, const u8 index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			     const struct tomoyo_acl_info *matched_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 			     const bool is_granted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	u8 mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	const u8 category = tomoyo_index2category[index] +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		TOMOYO_MAX_MAC_INDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	struct tomoyo_profile *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	if (!tomoyo_policy_loaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	p = tomoyo_profile(ns, profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if (tomoyo_log_count >= p->pref[TOMOYO_PREF_MAX_AUDIT_LOG])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (is_granted && matched_acl && matched_acl->cond &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	    matched_acl->cond->grant_log != TOMOYO_GRANTLOG_AUTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		return matched_acl->cond->grant_log == TOMOYO_GRANTLOG_YES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	mode = p->config[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (mode == TOMOYO_CONFIG_USE_DEFAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		mode = p->config[category];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (mode == TOMOYO_CONFIG_USE_DEFAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		mode = p->default_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	if (is_granted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		return mode & TOMOYO_CONFIG_WANT_GRANT_LOG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	return mode & TOMOYO_CONFIG_WANT_REJECT_LOG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)  * tomoyo_write_log2 - Write an audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)  * @r:    Pointer to "struct tomoyo_request_info".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)  * @len:  Buffer size needed for @fmt and @args.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)  * @fmt:  The printf()'s format string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)  * @args: va_list structure for @fmt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)  * Returns nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		       va_list args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	struct tomoyo_log *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	bool quota_exceeded = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	if (!tomoyo_get_audit(r->domain->ns, r->profile, r->type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 			      r->matched_acl, r->granted))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	buf = tomoyo_init_log(r, len, fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	entry = kzalloc(sizeof(*entry), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	if (!entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	entry->log = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	len = tomoyo_round2(strlen(buf) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	 * The entry->size is used for memory quota checks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	 * Don't go beyond strlen(entry->log).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	entry->size = len + tomoyo_round2(sizeof(*entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	spin_lock(&tomoyo_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	if (tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	    tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] + entry->size >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	    tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		quota_exceeded = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] += entry->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		list_add_tail(&entry->list, &tomoyo_log);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		tomoyo_log_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	spin_unlock(&tomoyo_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	if (quota_exceeded) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		kfree(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	wake_up(&tomoyo_log_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)  * tomoyo_write_log - Write an audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)  * @r:   Pointer to "struct tomoyo_request_info".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)  * @fmt: The printf()'s format string, followed by parameters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)  * Returns nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	len = vsnprintf((char *) &len, 1, fmt, args) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	tomoyo_write_log2(r, len, fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)  * tomoyo_read_log - Read an audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)  * @head: Pointer to "struct tomoyo_io_buffer".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)  * Returns nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) void tomoyo_read_log(struct tomoyo_io_buffer *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	struct tomoyo_log *ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	if (head->r.w_pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	kfree(head->read_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	head->read_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	spin_lock(&tomoyo_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	if (!list_empty(&tomoyo_log)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		ptr = list_entry(tomoyo_log.next, typeof(*ptr), list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		list_del(&ptr->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 		tomoyo_log_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 		tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] -= ptr->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	spin_unlock(&tomoyo_log_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	if (ptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 		head->read_buf = ptr->log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		head->r.w[head->r.w_pos++] = head->read_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 		kfree(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)  * tomoyo_poll_log - Wait for an audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)  * @file: Pointer to "struct file".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)  * @wait: Pointer to "poll_table". Maybe NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)  * Returns EPOLLIN | EPOLLRDNORM when ready to read an audit log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) __poll_t tomoyo_poll_log(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	if (tomoyo_log_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	poll_wait(file, &tomoyo_log_wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	if (tomoyo_log_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 		return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }