Initial commit of Linux 3.2.26
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
new file mode 100644
index 0000000..c47d3ce
--- /dev/null
+++ b/security/tomoyo/common.c
@@ -0,0 +1,2823 @@
+/*
+ * security/tomoyo/common.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/security.h>
+#include "common.h"
+
+/* String table for operation mode. */
+const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
+ [TOMOYO_CONFIG_DISABLED] = "disabled",
+ [TOMOYO_CONFIG_LEARNING] = "learning",
+ [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
+ [TOMOYO_CONFIG_ENFORCING] = "enforcing"
+};
+
+/* String table for /sys/kernel/security/tomoyo/profile */
+const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
+ /* CONFIG::file group */
+ [TOMOYO_MAC_FILE_EXECUTE] = "execute",
+ [TOMOYO_MAC_FILE_OPEN] = "open",
+ [TOMOYO_MAC_FILE_CREATE] = "create",
+ [TOMOYO_MAC_FILE_UNLINK] = "unlink",
+ [TOMOYO_MAC_FILE_GETATTR] = "getattr",
+ [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
+ [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
+ [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
+ [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
+ [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
+ [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
+ [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
+ [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
+ [TOMOYO_MAC_FILE_LINK] = "link",
+ [TOMOYO_MAC_FILE_RENAME] = "rename",
+ [TOMOYO_MAC_FILE_CHMOD] = "chmod",
+ [TOMOYO_MAC_FILE_CHOWN] = "chown",
+ [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
+ [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
+ [TOMOYO_MAC_FILE_CHROOT] = "chroot",
+ [TOMOYO_MAC_FILE_MOUNT] = "mount",
+ [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
+ [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
+ /* CONFIG::network group */
+ [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
+ [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
+ [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
+ [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
+ [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
+ /* CONFIG::misc group */
+ [TOMOYO_MAC_ENVIRON] = "env",
+ /* CONFIG group */
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
+};
+
+/* String table for conditions. */
+const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
+ [TOMOYO_TASK_UID] = "task.uid",
+ [TOMOYO_TASK_EUID] = "task.euid",
+ [TOMOYO_TASK_SUID] = "task.suid",
+ [TOMOYO_TASK_FSUID] = "task.fsuid",
+ [TOMOYO_TASK_GID] = "task.gid",
+ [TOMOYO_TASK_EGID] = "task.egid",
+ [TOMOYO_TASK_SGID] = "task.sgid",
+ [TOMOYO_TASK_FSGID] = "task.fsgid",
+ [TOMOYO_TASK_PID] = "task.pid",
+ [TOMOYO_TASK_PPID] = "task.ppid",
+ [TOMOYO_EXEC_ARGC] = "exec.argc",
+ [TOMOYO_EXEC_ENVC] = "exec.envc",
+ [TOMOYO_TYPE_IS_SOCKET] = "socket",
+ [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
+ [TOMOYO_TYPE_IS_FILE] = "file",
+ [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
+ [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
+ [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
+ [TOMOYO_TYPE_IS_FIFO] = "fifo",
+ [TOMOYO_MODE_SETUID] = "setuid",
+ [TOMOYO_MODE_SETGID] = "setgid",
+ [TOMOYO_MODE_STICKY] = "sticky",
+ [TOMOYO_MODE_OWNER_READ] = "owner_read",
+ [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
+ [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
+ [TOMOYO_MODE_GROUP_READ] = "group_read",
+ [TOMOYO_MODE_GROUP_WRITE] = "group_write",
+ [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
+ [TOMOYO_MODE_OTHERS_READ] = "others_read",
+ [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
+ [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
+ [TOMOYO_EXEC_REALPATH] = "exec.realpath",
+ [TOMOYO_SYMLINK_TARGET] = "symlink.target",
+ [TOMOYO_PATH1_UID] = "path1.uid",
+ [TOMOYO_PATH1_GID] = "path1.gid",
+ [TOMOYO_PATH1_INO] = "path1.ino",
+ [TOMOYO_PATH1_MAJOR] = "path1.major",
+ [TOMOYO_PATH1_MINOR] = "path1.minor",
+ [TOMOYO_PATH1_PERM] = "path1.perm",
+ [TOMOYO_PATH1_TYPE] = "path1.type",
+ [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
+ [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
+ [TOMOYO_PATH2_UID] = "path2.uid",
+ [TOMOYO_PATH2_GID] = "path2.gid",
+ [TOMOYO_PATH2_INO] = "path2.ino",
+ [TOMOYO_PATH2_MAJOR] = "path2.major",
+ [TOMOYO_PATH2_MINOR] = "path2.minor",
+ [TOMOYO_PATH2_PERM] = "path2.perm",
+ [TOMOYO_PATH2_TYPE] = "path2.type",
+ [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
+ [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
+ [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
+ [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
+ [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
+ [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
+ [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
+ [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
+ [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
+ [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
+};
+
+/* String table for PREFERENCE keyword. */
+static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
+ [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
+ [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
+};
+
+/* String table for path operation. */
+const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
+ [TOMOYO_TYPE_EXECUTE] = "execute",
+ [TOMOYO_TYPE_READ] = "read",
+ [TOMOYO_TYPE_WRITE] = "write",
+ [TOMOYO_TYPE_APPEND] = "append",
+ [TOMOYO_TYPE_UNLINK] = "unlink",
+ [TOMOYO_TYPE_GETATTR] = "getattr",
+ [TOMOYO_TYPE_RMDIR] = "rmdir",
+ [TOMOYO_TYPE_TRUNCATE] = "truncate",
+ [TOMOYO_TYPE_SYMLINK] = "symlink",
+ [TOMOYO_TYPE_CHROOT] = "chroot",
+ [TOMOYO_TYPE_UMOUNT] = "unmount",
+};
+
+/* String table for socket's operation. */
+const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
+ [TOMOYO_NETWORK_BIND] = "bind",
+ [TOMOYO_NETWORK_LISTEN] = "listen",
+ [TOMOYO_NETWORK_CONNECT] = "connect",
+ [TOMOYO_NETWORK_SEND] = "send",
+};
+
+/* String table for categories. */
+static const char * const tomoyo_category_keywords
+[TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
+ [TOMOYO_MAC_CATEGORY_FILE] = "file",
+ [TOMOYO_MAC_CATEGORY_NETWORK] = "network",
+ [TOMOYO_MAC_CATEGORY_MISC] = "misc",
+};
+
+/* Permit policy management by non-root user? */
+static bool tomoyo_manage_by_non_root;
+
+/* Utility functions. */
+
+/**
+ * tomoyo_yesno - Return "yes" or "no".
+ *
+ * @value: Bool value.
+ */
+const char *tomoyo_yesno(const unsigned int value)
+{
+ return value ? "yes" : "no";
+}
+
+/**
+ * tomoyo_addprintf - strncat()-like-snprintf().
+ *
+ * @buffer: Buffer to write to. Must be '\0'-terminated.
+ * @len: Size of @buffer.
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
+{
+ va_list args;
+ const int pos = strlen(buffer);
+ va_start(args, fmt);
+ vsnprintf(buffer + pos, len - pos - 1, fmt, args);
+ va_end(args);
+}
+
+/**
+ * tomoyo_flush - Flush queued string to userspace's buffer.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true if all data was flushed, false otherwise.
+ */
+static bool tomoyo_flush(struct tomoyo_io_buffer *head)
+{
+ while (head->r.w_pos) {
+ const char *w = head->r.w[0];
+ size_t len = strlen(w);
+ if (len) {
+ if (len > head->read_user_buf_avail)
+ len = head->read_user_buf_avail;
+ if (!len)
+ return false;
+ if (copy_to_user(head->read_user_buf, w, len))
+ return false;
+ head->read_user_buf_avail -= len;
+ head->read_user_buf += len;
+ w += len;
+ }
+ head->r.w[0] = w;
+ if (*w)
+ return false;
+ /* Add '\0' for audit logs and query. */
+ if (head->poll) {
+ if (!head->read_user_buf_avail ||
+ copy_to_user(head->read_user_buf, "", 1))
+ return false;
+ head->read_user_buf_avail--;
+ head->read_user_buf++;
+ }
+ head->r.w_pos--;
+ for (len = 0; len < head->r.w_pos; len++)
+ head->r.w[len] = head->r.w[len + 1];
+ }
+ head->r.avail = 0;
+ return true;
+}
+
+/**
+ * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @string: String to print.
+ *
+ * Note that @string has to be kept valid until @head is kfree()d.
+ * This means that char[] allocated on stack memory cannot be passed to
+ * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
+ */
+static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
+{
+ if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
+ head->r.w[head->r.w_pos++] = string;
+ tomoyo_flush(head);
+ } else
+ WARN_ON(1);
+}
+
+static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
+ ...) __printf(2, 3);
+
+/**
+ * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @fmt: The printf()'s format string, followed by parameters.
+ */
+static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
+ ...)
+{
+ va_list args;
+ size_t len;
+ size_t pos = head->r.avail;
+ int size = head->readbuf_size - pos;
+ if (size <= 0)
+ return;
+ va_start(args, fmt);
+ len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
+ va_end(args);
+ if (pos + len >= head->readbuf_size) {
+ WARN_ON(1);
+ return;
+ }
+ head->r.avail += len;
+ tomoyo_set_string(head, head->read_buf + pos);
+}
+
+/**
+ * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_space(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, " ");
+}
+
+/**
+ * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, "\n");
+ return !head->r.w_pos;
+}
+
+/**
+ * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, "/");
+}
+
+/* List of namespaces. */
+LIST_HEAD(tomoyo_namespace_list);
+/* True if namespace other than tomoyo_kernel_namespace is defined. */
+static bool tomoyo_namespace_enabled;
+
+/**
+ * tomoyo_init_policy_namespace - Initialize namespace.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ *
+ * Returns nothing.
+ */
+void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
+{
+ unsigned int idx;
+ for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
+ INIT_LIST_HEAD(&ns->acl_group[idx]);
+ for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
+ INIT_LIST_HEAD(&ns->group_list[idx]);
+ for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
+ INIT_LIST_HEAD(&ns->policy_list[idx]);
+ ns->profile_version = 20110903;
+ tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
+ list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
+}
+
+/**
+ * tomoyo_print_namespace - Print namespace header.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
+{
+ if (!tomoyo_namespace_enabled)
+ return;
+ tomoyo_set_string(head,
+ container_of(head->r.ns,
+ struct tomoyo_policy_namespace,
+ namespace_list)->name);
+ tomoyo_set_space(head);
+}
+
+/**
+ * tomoyo_print_name_union - Print a tomoyo_name_union.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ */
+static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
+ const struct tomoyo_name_union *ptr)
+{
+ tomoyo_set_space(head);
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ tomoyo_set_string(head, ptr->filename->name);
+ }
+}
+
+/**
+ * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
+ const struct tomoyo_name_union *ptr)
+{
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ tomoyo_set_string(head, "\"");
+ tomoyo_set_string(head, ptr->filename->name);
+ tomoyo_set_string(head, "\"");
+ }
+}
+
+/**
+ * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_number_union_nospace
+(struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
+{
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ int i;
+ unsigned long min = ptr->values[0];
+ const unsigned long max = ptr->values[1];
+ u8 min_type = ptr->value_type[0];
+ const u8 max_type = ptr->value_type[1];
+ char buffer[128];
+ buffer[0] = '\0';
+ for (i = 0; i < 2; i++) {
+ switch (min_type) {
+ case TOMOYO_VALUE_TYPE_HEXADECIMAL:
+ tomoyo_addprintf(buffer, sizeof(buffer),
+ "0x%lX", min);
+ break;
+ case TOMOYO_VALUE_TYPE_OCTAL:
+ tomoyo_addprintf(buffer, sizeof(buffer),
+ "0%lo", min);
+ break;
+ default:
+ tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
+ min);
+ break;
+ }
+ if (min == max && min_type == max_type)
+ break;
+ tomoyo_addprintf(buffer, sizeof(buffer), "-");
+ min_type = max_type;
+ min = max;
+ }
+ tomoyo_io_printf(head, "%s", buffer);
+ }
+}
+
+/**
+ * tomoyo_print_number_union - Print a tomoyo_number_union.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
+ const struct tomoyo_number_union *ptr)
+{
+ tomoyo_set_space(head);
+ tomoyo_print_number_union_nospace(head, ptr);
+}
+
+/**
+ * tomoyo_assign_profile - Create a new profile.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number to create.
+ *
+ * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
+ */
+static struct tomoyo_profile *tomoyo_assign_profile
+(struct tomoyo_policy_namespace *ns, const unsigned int profile)
+{
+ struct tomoyo_profile *ptr;
+ struct tomoyo_profile *entry;
+ if (profile >= TOMOYO_MAX_PROFILES)
+ return NULL;
+ ptr = ns->profile_ptr[profile];
+ if (ptr)
+ return ptr;
+ entry = kzalloc(sizeof(*entry), GFP_NOFS);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ ptr = ns->profile_ptr[profile];
+ if (!ptr && tomoyo_memory_ok(entry)) {
+ ptr = entry;
+ ptr->default_config = TOMOYO_CONFIG_DISABLED |
+ TOMOYO_CONFIG_WANT_GRANT_LOG |
+ TOMOYO_CONFIG_WANT_REJECT_LOG;
+ memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
+ sizeof(ptr->config));
+ ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] =
+ CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG;
+ ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] =
+ CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY;
+ mb(); /* Avoid out-of-order execution. */
+ ns->profile_ptr[profile] = ptr;
+ entry = NULL;
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ out:
+ kfree(entry);
+ return ptr;
+}
+
+/**
+ * tomoyo_profile - Find a profile.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number to find.
+ *
+ * Returns pointer to "struct tomoyo_profile".
+ */
+struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
+ const u8 profile)
+{
+ static struct tomoyo_profile tomoyo_null_profile;
+ struct tomoyo_profile *ptr = ns->profile_ptr[profile];
+ if (!ptr)
+ ptr = &tomoyo_null_profile;
+ return ptr;
+}
+
+/**
+ * tomoyo_find_yesno - Find values for specified keyword.
+ *
+ * @string: String to check.
+ * @find: Name of keyword.
+ *
+ * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
+ */
+static s8 tomoyo_find_yesno(const char *string, const char *find)
+{
+ const char *cp = strstr(string, find);
+ if (cp) {
+ cp += strlen(find);
+ if (!strncmp(cp, "=yes", 4))
+ return 1;
+ else if (!strncmp(cp, "=no", 3))
+ return 0;
+ }
+ return -1;
+}
+
+/**
+ * tomoyo_set_uint - Set value for specified preference.
+ *
+ * @i: Pointer to "unsigned int".
+ * @string: String to check.
+ * @find: Name of keyword.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_uint(unsigned int *i, const char *string,
+ const char *find)
+{
+ const char *cp = strstr(string, find);
+ if (cp)
+ sscanf(cp + strlen(find), "=%u", i);
+}
+
+/**
+ * tomoyo_set_mode - Set mode for specified profile.
+ *
+ * @name: Name of functionality.
+ * @value: Mode for @name.
+ * @profile: Pointer to "struct tomoyo_profile".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_set_mode(char *name, const char *value,
+ struct tomoyo_profile *profile)
+{
+ u8 i;
+ u8 config;
+ if (!strcmp(name, "CONFIG")) {
+ i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
+ config = profile->default_config;
+ } else if (tomoyo_str_starts(&name, "CONFIG::")) {
+ config = 0;
+ for (i = 0; i < TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
+ int len = 0;
+ if (i < TOMOYO_MAX_MAC_INDEX) {
+ const u8 c = tomoyo_index2category[i];
+ const char *category =
+ tomoyo_category_keywords[c];
+ len = strlen(category);
+ if (strncmp(name, category, len) ||
+ name[len++] != ':' || name[len++] != ':')
+ continue;
+ }
+ if (strcmp(name + len, tomoyo_mac_keywords[i]))
+ continue;
+ config = profile->config[i];
+ break;
+ }
+ if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
+ }
+ if (strstr(value, "use_default")) {
+ config = TOMOYO_CONFIG_USE_DEFAULT;
+ } else {
+ u8 mode;
+ for (mode = 0; mode < 4; mode++)
+ if (strstr(value, tomoyo_mode[mode]))
+ /*
+ * Update lower 3 bits in order to distinguish
+ * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
+ */
+ config = (config & ~7) | mode;
+ if (config != TOMOYO_CONFIG_USE_DEFAULT) {
+ switch (tomoyo_find_yesno(value, "grant_log")) {
+ case 1:
+ config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
+ break;
+ case 0:
+ config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
+ break;
+ }
+ switch (tomoyo_find_yesno(value, "reject_log")) {
+ case 1:
+ config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
+ break;
+ case 0:
+ config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
+ break;
+ }
+ }
+ }
+ if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ profile->config[i] = config;
+ else if (config != TOMOYO_CONFIG_USE_DEFAULT)
+ profile->default_config = config;
+ return 0;
+}
+
+/**
+ * tomoyo_write_profile - Write profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ unsigned int i;
+ char *cp;
+ struct tomoyo_profile *profile;
+ if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
+ == 1)
+ return 0;
+ i = simple_strtoul(data, &cp, 10);
+ if (*cp != '-')
+ return -EINVAL;
+ data = cp + 1;
+ profile = tomoyo_assign_profile(head->w.ns, i);
+ if (!profile)
+ return -EINVAL;
+ cp = strchr(data, '=');
+ if (!cp)
+ return -EINVAL;
+ *cp++ = '\0';
+ if (!strcmp(data, "COMMENT")) {
+ static DEFINE_SPINLOCK(lock);
+ const struct tomoyo_path_info *new_comment
+ = tomoyo_get_name(cp);
+ const struct tomoyo_path_info *old_comment;
+ if (!new_comment)
+ return -ENOMEM;
+ spin_lock(&lock);
+ old_comment = profile->comment;
+ profile->comment = new_comment;
+ spin_unlock(&lock);
+ tomoyo_put_name(old_comment);
+ return 0;
+ }
+ if (!strcmp(data, "PREFERENCE")) {
+ for (i = 0; i < TOMOYO_MAX_PREF; i++)
+ tomoyo_set_uint(&profile->pref[i], cp,
+ tomoyo_pref_keywords[i]);
+ return 0;
+ }
+ return tomoyo_set_mode(data, cp, profile);
+}
+
+/**
+ * tomoyo_print_config - Print mode for specified functionality.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @config: Mode for that functionality.
+ *
+ * Returns nothing.
+ *
+ * Caller prints functionality's name.
+ */
+static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
+{
+ tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
+ tomoyo_mode[config & 3],
+ tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
+ tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
+}
+
+/**
+ * tomoyo_read_profile - Read profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
+{
+ u8 index;
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ const struct tomoyo_profile *profile;
+ if (head->r.eof)
+ return;
+ next:
+ index = head->r.index;
+ profile = ns->profile_ptr[index];
+ switch (head->r.step) {
+ case 0:
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
+ ns->profile_version);
+ head->r.step++;
+ break;
+ case 1:
+ for ( ; head->r.index < TOMOYO_MAX_PROFILES;
+ head->r.index++)
+ if (ns->profile_ptr[head->r.index])
+ break;
+ if (head->r.index == TOMOYO_MAX_PROFILES) {
+ head->r.eof = true;
+ return;
+ }
+ head->r.step++;
+ break;
+ case 2:
+ {
+ u8 i;
+ const struct tomoyo_path_info *comment =
+ profile->comment;
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-COMMENT=", index);
+ tomoyo_set_string(head, comment ? comment->name : "");
+ tomoyo_set_lf(head);
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
+ for (i = 0; i < TOMOYO_MAX_PREF; i++)
+ tomoyo_io_printf(head, "%s=%u ",
+ tomoyo_pref_keywords[i],
+ profile->pref[i]);
+ tomoyo_set_string(head, "}\n");
+ head->r.step++;
+ }
+ break;
+ case 3:
+ {
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
+ tomoyo_print_config(head, profile->default_config);
+ head->r.bit = 0;
+ head->r.step++;
+ }
+ break;
+ case 4:
+ for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
+ const u8 i = head->r.bit;
+ const u8 config = profile->config[i];
+ if (config == TOMOYO_CONFIG_USE_DEFAULT)
+ continue;
+ tomoyo_print_namespace(head);
+ if (i < TOMOYO_MAX_MAC_INDEX)
+ tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
+ index,
+ tomoyo_category_keywords
+ [tomoyo_index2category[i]],
+ tomoyo_mac_keywords[i]);
+ else
+ tomoyo_io_printf(head, "%u-CONFIG::%s", index,
+ tomoyo_mac_keywords[i]);
+ tomoyo_print_config(head, config);
+ head->r.bit++;
+ break;
+ }
+ if (head->r.bit == TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
+ head->r.index++;
+ head->r.step = 1;
+ }
+ break;
+ }
+ if (tomoyo_flush(head))
+ goto next;
+}
+
+/**
+ * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ return container_of(a, struct tomoyo_manager, head)->manager ==
+ container_of(b, struct tomoyo_manager, head)->manager;
+}
+
+/**
+ * tomoyo_update_manager_entry - Add a manager entry.
+ *
+ * @manager: The path to manager or the domainnamme.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_manager_entry(const char *manager,
+ const bool is_delete)
+{
+ struct tomoyo_manager e = { };
+ struct tomoyo_acl_param param = {
+ /* .ns = &tomoyo_kernel_namespace, */
+ .is_delete = is_delete,
+ .list = &tomoyo_kernel_namespace.
+ policy_list[TOMOYO_ID_MANAGER],
+ };
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ if (tomoyo_domain_def(manager)) {
+ if (!tomoyo_correct_domain(manager))
+ return -EINVAL;
+ e.is_domain = true;
+ } else {
+ if (!tomoyo_correct_path(manager))
+ return -EINVAL;
+ }
+ e.manager = tomoyo_get_name(manager);
+ if (e.manager) {
+ error = tomoyo_update_policy(&e.head, sizeof(e), ¶m,
+ tomoyo_same_manager);
+ tomoyo_put_name(e.manager);
+ }
+ return error;
+}
+
+/**
+ * tomoyo_write_manager - Write manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+
+ if (!strcmp(data, "manage_by_non_root")) {
+ tomoyo_manage_by_non_root = !head->w.is_delete;
+ return 0;
+ }
+ return tomoyo_update_manager_entry(data, head->w.is_delete);
+}
+
+/**
+ * tomoyo_read_manager - Read manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
+{
+ if (head->r.eof)
+ return;
+ list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.
+ policy_list[TOMOYO_ID_MANAGER]) {
+ struct tomoyo_manager *ptr =
+ list_entry(head->r.acl, typeof(*ptr), head.list);
+ if (ptr->head.is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return;
+ tomoyo_set_string(head, ptr->manager->name);
+ tomoyo_set_lf(head);
+ }
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_manager - Check whether the current process is a policy manager.
+ *
+ * Returns true if the current process is permitted to modify policy
+ * via /sys/kernel/security/tomoyo/ interface.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_manager(void)
+{
+ struct tomoyo_manager *ptr;
+ const char *exe;
+ const struct task_struct *task = current;
+ const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
+ bool found = false;
+
+ if (!tomoyo_policy_loaded)
+ return true;
+ if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
+ return false;
+ list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
+ policy_list[TOMOYO_ID_MANAGER], head.list) {
+ if (!ptr->head.is_deleted && ptr->is_domain
+ && !tomoyo_pathcmp(domainname, ptr->manager)) {
+ found = true;
+ break;
+ }
+ }
+ if (found)
+ return true;
+ exe = tomoyo_get_exe();
+ if (!exe)
+ return false;
+ list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
+ policy_list[TOMOYO_ID_MANAGER], head.list) {
+ if (!ptr->head.is_deleted && !ptr->is_domain
+ && !strcmp(exe, ptr->manager->name)) {
+ found = true;
+ break;
+ }
+ }
+ if (!found) { /* Reduce error messages. */
+ static pid_t last_pid;
+ const pid_t pid = current->pid;
+ if (last_pid != pid) {
+ printk(KERN_WARNING "%s ( %s ) is not permitted to "
+ "update policies.\n", domainname->name, exe);
+ last_pid = pid;
+ }
+ }
+ kfree(exe);
+ return found;
+}
+
+static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
+(unsigned int serial);
+
+/**
+ * tomoyo_select_domain - Parse select command.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @data: String to parse.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
+ const char *data)
+{
+ unsigned int pid;
+ struct tomoyo_domain_info *domain = NULL;
+ bool global_pid = false;
+ if (strncmp(data, "select ", 7))
+ return false;
+ data += 7;
+ if (sscanf(data, "pid=%u", &pid) == 1 ||
+ (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
+ struct task_struct *p;
+ rcu_read_lock();
+ if (global_pid)
+ p = find_task_by_pid_ns(pid, &init_pid_ns);
+ else
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_real_domain(p);
+ rcu_read_unlock();
+ } else if (!strncmp(data, "domain=", 7)) {
+ if (tomoyo_domain_def(data + 7))
+ domain = tomoyo_find_domain(data + 7);
+ } else if (sscanf(data, "Q=%u", &pid) == 1) {
+ domain = tomoyo_find_domain_by_qid(pid);
+ } else
+ return false;
+ head->w.domain = domain;
+ /* Accessing read_buf is safe because head->io_sem is held. */
+ if (!head->read_buf)
+ return true; /* Do nothing if open(O_WRONLY). */
+ memset(&head->r, 0, sizeof(head->r));
+ head->r.print_this_domain_only = true;
+ if (domain)
+ head->r.domain = &domain->list;
+ else
+ head->r.eof = 1;
+ tomoyo_io_printf(head, "# select %s\n", data);
+ if (domain && domain->is_deleted)
+ tomoyo_io_printf(head, "# This is a deleted domain.\n");
+ return true;
+}
+
+/**
+ * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head);
+ return p1->domainname == p2->domainname;
+}
+
+/**
+ * tomoyo_write_task - Update task related list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_task(struct tomoyo_acl_param *param)
+{
+ int error = -EINVAL;
+ if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) {
+ struct tomoyo_task_acl e = {
+ .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL,
+ .domainname = tomoyo_get_domainname(param),
+ };
+ if (e.domainname)
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_task_acl,
+ NULL);
+ tomoyo_put_name(e.domainname);
+ }
+ return error;
+}
+
+/**
+ * tomoyo_delete_domain - Delete a domain.
+ *
+ * @domainname: The name of domain.
+ *
+ * Returns 0.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_delete_domain(char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return 0;
+ /* Is there an active domain? */
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
+ /* Never delete tomoyo_kernel_domain */
+ if (domain == &tomoyo_kernel_domain)
+ continue;
+ if (domain->is_deleted ||
+ tomoyo_pathcmp(domain->domainname, &name))
+ continue;
+ domain->is_deleted = true;
+ break;
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ return 0;
+}
+
+/**
+ * tomoyo_write_domain2 - Write domain policy.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @list: Pointer to "struct list_head".
+ * @data: Policy to be interpreted.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
+ struct list_head *list, char *data,
+ const bool is_delete)
+{
+ struct tomoyo_acl_param param = {
+ .ns = ns,
+ .list = list,
+ .data = data,
+ .is_delete = is_delete,
+ };
+ static const struct {
+ const char *keyword;
+ int (*write) (struct tomoyo_acl_param *);
+ } tomoyo_callback[5] = {
+ { "file ", tomoyo_write_file },
+ { "network inet ", tomoyo_write_inet_network },
+ { "network unix ", tomoyo_write_unix_network },
+ { "misc ", tomoyo_write_misc },
+ { "task ", tomoyo_write_task },
+ };
+ u8 i;
+
+ for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
+ if (!tomoyo_str_starts(¶m.data,
+ tomoyo_callback[i].keyword))
+ continue;
+ return tomoyo_callback[i].write(¶m);
+ }
+ return -EINVAL;
+}
+
+/* String table for domain flags. */
+const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
+ [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
+ [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
+};
+
+/**
+ * tomoyo_write_domain - Write domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ struct tomoyo_policy_namespace *ns;
+ struct tomoyo_domain_info *domain = head->w.domain;
+ const bool is_delete = head->w.is_delete;
+ bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
+ unsigned int profile;
+ if (*data == '<') {
+ domain = NULL;
+ if (is_delete)
+ tomoyo_delete_domain(data);
+ else if (is_select)
+ domain = tomoyo_find_domain(data);
+ else
+ domain = tomoyo_assign_domain(data, false);
+ head->w.domain = domain;
+ return 0;
+ }
+ if (!domain)
+ return -EINVAL;
+ ns = domain->ns;
+ if (sscanf(data, "use_profile %u", &profile) == 1
+ && profile < TOMOYO_MAX_PROFILES) {
+ if (!tomoyo_policy_loaded || ns->profile_ptr[profile])
+ domain->profile = (u8) profile;
+ return 0;
+ }
+ if (sscanf(data, "use_group %u\n", &profile) == 1
+ && profile < TOMOYO_MAX_ACL_GROUPS) {
+ if (!is_delete)
+ domain->group = (u8) profile;
+ return 0;
+ }
+ for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) {
+ const char *cp = tomoyo_dif[profile];
+ if (strncmp(data, cp, strlen(cp) - 1))
+ continue;
+ domain->flags[profile] = !is_delete;
+ return 0;
+ }
+ return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
+ is_delete);
+}
+
+/**
+ * tomoyo_print_condition - Print condition part.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @cond: Pointer to "struct tomoyo_condition".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
+ const struct tomoyo_condition *cond)
+{
+ switch (head->r.cond_step) {
+ case 0:
+ head->r.cond_index = 0;
+ head->r.cond_step++;
+ if (cond->transit) {
+ tomoyo_set_space(head);
+ tomoyo_set_string(head, cond->transit->name);
+ }
+ /* fall through */
+ case 1:
+ {
+ const u16 condc = cond->condc;
+ const struct tomoyo_condition_element *condp =
+ (typeof(condp)) (cond + 1);
+ const struct tomoyo_number_union *numbers_p =
+ (typeof(numbers_p)) (condp + condc);
+ const struct tomoyo_name_union *names_p =
+ (typeof(names_p))
+ (numbers_p + cond->numbers_count);
+ const struct tomoyo_argv *argv =
+ (typeof(argv)) (names_p + cond->names_count);
+ const struct tomoyo_envp *envp =
+ (typeof(envp)) (argv + cond->argc);
+ u16 skip;
+ for (skip = 0; skip < head->r.cond_index; skip++) {
+ const u8 left = condp->left;
+ const u8 right = condp->right;
+ condp++;
+ switch (left) {
+ case TOMOYO_ARGV_ENTRY:
+ argv++;
+ continue;
+ case TOMOYO_ENVP_ENTRY:
+ envp++;
+ continue;
+ case TOMOYO_NUMBER_UNION:
+ numbers_p++;
+ break;
+ }
+ switch (right) {
+ case TOMOYO_NAME_UNION:
+ names_p++;
+ break;
+ case TOMOYO_NUMBER_UNION:
+ numbers_p++;
+ break;
+ }
+ }
+ while (head->r.cond_index < condc) {
+ const u8 match = condp->equals;
+ const u8 left = condp->left;
+ const u8 right = condp->right;
+ if (!tomoyo_flush(head))
+ return false;
+ condp++;
+ head->r.cond_index++;
+ tomoyo_set_space(head);
+ switch (left) {
+ case TOMOYO_ARGV_ENTRY:
+ tomoyo_io_printf(head,
+ "exec.argv[%lu]%s=\"",
+ argv->index, argv->
+ is_not ? "!" : "");
+ tomoyo_set_string(head,
+ argv->value->name);
+ tomoyo_set_string(head, "\"");
+ argv++;
+ continue;
+ case TOMOYO_ENVP_ENTRY:
+ tomoyo_set_string(head,
+ "exec.envp[\"");
+ tomoyo_set_string(head,
+ envp->name->name);
+ tomoyo_io_printf(head, "\"]%s=", envp->
+ is_not ? "!" : "");
+ if (envp->value) {
+ tomoyo_set_string(head, "\"");
+ tomoyo_set_string(head, envp->
+ value->name);
+ tomoyo_set_string(head, "\"");
+ } else {
+ tomoyo_set_string(head,
+ "NULL");
+ }
+ envp++;
+ continue;
+ case TOMOYO_NUMBER_UNION:
+ tomoyo_print_number_union_nospace
+ (head, numbers_p++);
+ break;
+ default:
+ tomoyo_set_string(head,
+ tomoyo_condition_keyword[left]);
+ break;
+ }
+ tomoyo_set_string(head, match ? "=" : "!=");
+ switch (right) {
+ case TOMOYO_NAME_UNION:
+ tomoyo_print_name_union_quoted
+ (head, names_p++);
+ break;
+ case TOMOYO_NUMBER_UNION:
+ tomoyo_print_number_union_nospace
+ (head, numbers_p++);
+ break;
+ default:
+ tomoyo_set_string(head,
+ tomoyo_condition_keyword[right]);
+ break;
+ }
+ }
+ }
+ head->r.cond_step++;
+ /* fall through */
+ case 2:
+ if (!tomoyo_flush(head))
+ break;
+ head->r.cond_step++;
+ /* fall through */
+ case 3:
+ if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
+ tomoyo_io_printf(head, " grant_log=%s",
+ tomoyo_yesno(cond->grant_log ==
+ TOMOYO_GRANTLOG_YES));
+ tomoyo_set_lf(head);
+ return true;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_set_group - Print "acl_group " header keyword and category name.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @category: Category name.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_group(struct tomoyo_io_buffer *head,
+ const char *category)
+{
+ if (head->type == TOMOYO_EXCEPTIONPOLICY) {
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "acl_group %u ",
+ head->r.acl_group_index);
+ }
+ tomoyo_set_string(head, category);
+}
+
+/**
+ * tomoyo_print_entry - Print an ACL entry.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @acl: Pointer to an ACL entry.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
+ struct tomoyo_acl_info *acl)
+{
+ const u8 acl_type = acl->type;
+ bool first = true;
+ u8 bit;
+
+ if (head->r.print_cond_part)
+ goto print_cond_part;
+ if (acl->is_deleted)
+ return true;
+ if (!tomoyo_flush(head))
+ return false;
+ else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
+ struct tomoyo_path_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u16 perm = ptr->perm;
+ for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (head->r.print_transition_related_only &&
+ bit != TOMOYO_TYPE_EXECUTE)
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_path_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) {
+ struct tomoyo_task_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ tomoyo_set_group(head, "task ");
+ tomoyo_set_string(head, "manual_domain_transition ");
+ tomoyo_set_string(head, ptr->domainname->name);
+ } else if (head->r.print_transition_related_only) {
+ return true;
+ } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
+ struct tomoyo_path2_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+ for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pp2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name1);
+ tomoyo_print_name_union(head, &ptr->name2);
+ } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
+ struct tomoyo_path_number_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+ for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pn2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ tomoyo_print_number_union(head, &ptr->number);
+ } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
+ struct tomoyo_mkdev_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+ for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pnnn2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ tomoyo_print_number_union(head, &ptr->mode);
+ tomoyo_print_number_union(head, &ptr->major);
+ tomoyo_print_number_union(head, &ptr->minor);
+ } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
+ struct tomoyo_inet_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "network inet ");
+ tomoyo_set_string(head, tomoyo_proto_keyword
+ [ptr->protocol]);
+ tomoyo_set_space(head);
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_set_space(head);
+ if (ptr->address.group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->address.group->group_name
+ ->name);
+ } else {
+ char buf[128];
+ tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
+ tomoyo_io_printf(head, "%s", buf);
+ }
+ tomoyo_print_number_union(head, &ptr->port);
+ } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
+ struct tomoyo_unix_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "network unix ");
+ tomoyo_set_string(head, tomoyo_proto_keyword
+ [ptr->protocol]);
+ tomoyo_set_space(head);
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
+ struct tomoyo_mount_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ tomoyo_set_group(head, "file mount");
+ tomoyo_print_name_union(head, &ptr->dev_name);
+ tomoyo_print_name_union(head, &ptr->dir_name);
+ tomoyo_print_name_union(head, &ptr->fs_type);
+ tomoyo_print_number_union(head, &ptr->flags);
+ } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
+ struct tomoyo_env_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_set_group(head, "misc env ");
+ tomoyo_set_string(head, ptr->env->name);
+ }
+ if (acl->cond) {
+ head->r.print_cond_part = true;
+ head->r.cond_step = 0;
+ if (!tomoyo_flush(head))
+ return false;
+print_cond_part:
+ if (!tomoyo_print_condition(head, acl->cond))
+ return false;
+ head->r.print_cond_part = false;
+ } else {
+ tomoyo_set_lf(head);
+ }
+ return true;
+}
+
+/**
+ * tomoyo_read_domain2 - Read domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @list: Pointer to "struct list_head".
+ *
+ * Caller holds tomoyo_read_lock().
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
+ struct list_head *list)
+{
+ list_for_each_cookie(head->r.acl, list) {
+ struct tomoyo_acl_info *ptr =
+ list_entry(head->r.acl, typeof(*ptr), list);
+ if (!tomoyo_print_entry(head, ptr))
+ return false;
+ }
+ head->r.acl = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_domain - Read domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
+{
+ if (head->r.eof)
+ return;
+ list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
+ struct tomoyo_domain_info *domain =
+ list_entry(head->r.domain, typeof(*domain), list);
+ switch (head->r.step) {
+ u8 i;
+ case 0:
+ if (domain->is_deleted &&
+ !head->r.print_this_domain_only)
+ continue;
+ /* Print domainname and flags. */
+ tomoyo_set_string(head, domain->domainname->name);
+ tomoyo_set_lf(head);
+ tomoyo_io_printf(head, "use_profile %u\n",
+ domain->profile);
+ tomoyo_io_printf(head, "use_group %u\n",
+ domain->group);
+ for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
+ if (domain->flags[i])
+ tomoyo_set_string(head, tomoyo_dif[i]);
+ head->r.step++;
+ tomoyo_set_lf(head);
+ /* fall through */
+ case 1:
+ if (!tomoyo_read_domain2(head, &domain->acl_info_list))
+ return;
+ head->r.step++;
+ if (!tomoyo_set_lf(head))
+ return;
+ /* fall through */
+ case 2:
+ head->r.step = 0;
+ if (head->r.print_this_domain_only)
+ goto done;
+ }
+ }
+ done:
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_write_pid: Specify PID to obtain domainname.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
+{
+ head->r.eof = false;
+ return 0;
+}
+
+/**
+ * tomoyo_read_pid - Get domainname of the specified PID.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns the domainname which the specified PID is in on success,
+ * empty string otherwise.
+ * The PID is specified by tomoyo_write_pid() so that the user can obtain
+ * using read()/write() interface rather than sysctl() interface.
+ */
+static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
+{
+ char *buf = head->write_buf;
+ bool global_pid = false;
+ unsigned int pid;
+ struct task_struct *p;
+ struct tomoyo_domain_info *domain = NULL;
+
+ /* Accessing write_buf is safe because head->io_sem is held. */
+ if (!buf) {
+ head->r.eof = true;
+ return; /* Do nothing if open(O_RDONLY). */
+ }
+ if (head->r.w_pos || head->r.eof)
+ return;
+ head->r.eof = true;
+ if (tomoyo_str_starts(&buf, "global-pid "))
+ global_pid = true;
+ pid = (unsigned int) simple_strtoul(buf, NULL, 10);
+ rcu_read_lock();
+ if (global_pid)
+ p = find_task_by_pid_ns(pid, &init_pid_ns);
+ else
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_real_domain(p);
+ rcu_read_unlock();
+ if (!domain)
+ return;
+ tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
+ tomoyo_set_string(head, domain->domainname->name);
+}
+
+/* String table for domain transition control keywords. */
+static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
+ [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
+ [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
+ [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
+ [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
+ [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
+ [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
+};
+
+/* String table for grouping keywords. */
+static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
+ [TOMOYO_PATH_GROUP] = "path_group ",
+ [TOMOYO_NUMBER_GROUP] = "number_group ",
+ [TOMOYO_ADDRESS_GROUP] = "address_group ",
+};
+
+/**
+ * tomoyo_write_exception - Write exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
+{
+ const bool is_delete = head->w.is_delete;
+ struct tomoyo_acl_param param = {
+ .ns = head->w.ns,
+ .is_delete = is_delete,
+ .data = head->write_buf,
+ };
+ u8 i;
+ if (tomoyo_str_starts(¶m.data, "aggregator "))
+ return tomoyo_write_aggregator(¶m);
+ for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
+ if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i]))
+ return tomoyo_write_transition_control(¶m, i);
+ for (i = 0; i < TOMOYO_MAX_GROUP; i++)
+ if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i]))
+ return tomoyo_write_group(¶m, i);
+ if (tomoyo_str_starts(¶m.data, "acl_group ")) {
+ unsigned int group;
+ char *data;
+ group = simple_strtoul(param.data, &data, 10);
+ if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
+ return tomoyo_write_domain2
+ (head->w.ns, &head->w.ns->acl_group[group],
+ data, is_delete);
+ }
+ return -EINVAL;
+}
+
+/**
+ * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx: Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ struct list_head *list = &ns->group_list[idx];
+ list_for_each_cookie(head->r.group, list) {
+ struct tomoyo_group *group =
+ list_entry(head->r.group, typeof(*group), head.list);
+ list_for_each_cookie(head->r.acl, &group->member_list) {
+ struct tomoyo_acl_head *ptr =
+ list_entry(head->r.acl, typeof(*ptr), list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return false;
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, tomoyo_group_name[idx]);
+ tomoyo_set_string(head, group->group_name->name);
+ if (idx == TOMOYO_PATH_GROUP) {
+ tomoyo_set_space(head);
+ tomoyo_set_string(head, container_of
+ (ptr, struct tomoyo_path_group,
+ head)->member_name->name);
+ } else if (idx == TOMOYO_NUMBER_GROUP) {
+ tomoyo_print_number_union(head, &container_of
+ (ptr,
+ struct tomoyo_number_group,
+ head)->number);
+ } else if (idx == TOMOYO_ADDRESS_GROUP) {
+ char buffer[128];
+
+ struct tomoyo_address_group *member =
+ container_of(ptr, typeof(*member),
+ head);
+ tomoyo_print_ip(buffer, sizeof(buffer),
+ &member->address);
+ tomoyo_io_printf(head, " %s", buffer);
+ }
+ tomoyo_set_lf(head);
+ }
+ head->r.acl = NULL;
+ }
+ head->r.group = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx: Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ struct list_head *list = &ns->policy_list[idx];
+ list_for_each_cookie(head->r.acl, list) {
+ struct tomoyo_acl_head *acl =
+ container_of(head->r.acl, typeof(*acl), list);
+ if (acl->is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return false;
+ switch (idx) {
+ case TOMOYO_ID_TRANSITION_CONTROL:
+ {
+ struct tomoyo_transition_control *ptr =
+ container_of(acl, typeof(*ptr), head);
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, tomoyo_transition_type
+ [ptr->type]);
+ tomoyo_set_string(head, ptr->program ?
+ ptr->program->name : "any");
+ tomoyo_set_string(head, " from ");
+ tomoyo_set_string(head, ptr->domainname ?
+ ptr->domainname->name :
+ "any");
+ }
+ break;
+ case TOMOYO_ID_AGGREGATOR:
+ {
+ struct tomoyo_aggregator *ptr =
+ container_of(acl, typeof(*ptr), head);
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, "aggregator ");
+ tomoyo_set_string(head,
+ ptr->original_name->name);
+ tomoyo_set_space(head);
+ tomoyo_set_string(head,
+ ptr->aggregated_name->name);
+ }
+ break;
+ default:
+ continue;
+ }
+ tomoyo_set_lf(head);
+ }
+ head->r.acl = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_exception - Read exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ if (head->r.eof)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY &&
+ tomoyo_read_policy(head, head->r.step))
+ head->r.step++;
+ if (head->r.step < TOMOYO_MAX_POLICY)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
+ tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
+ head->r.step++;
+ if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
+ + TOMOYO_MAX_ACL_GROUPS) {
+ head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
+ - TOMOYO_MAX_GROUP;
+ if (!tomoyo_read_domain2(head, &ns->acl_group
+ [head->r.acl_group_index]))
+ return;
+ head->r.step++;
+ }
+ head->r.eof = true;
+}
+
+/* Wait queue for kernel -> userspace notification. */
+static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
+/* Wait queue for userspace -> kernel notification. */
+static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
+
+/* Structure for query. */
+struct tomoyo_query {
+ struct list_head list;
+ struct tomoyo_domain_info *domain;
+ char *query;
+ size_t query_len;
+ unsigned int serial;
+ u8 timer;
+ u8 answer;
+ u8 retry;
+};
+
+/* The list for "struct tomoyo_query". */
+static LIST_HEAD(tomoyo_query_list);
+
+/* Lock for manipulating tomoyo_query_list. */
+static DEFINE_SPINLOCK(tomoyo_query_list_lock);
+
+/*
+ * Number of "struct file" referring /sys/kernel/security/tomoyo/query
+ * interface.
+ */
+static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
+
+/**
+ * tomoyo_truncate - Truncate a line.
+ *
+ * @str: String to truncate.
+ *
+ * Returns length of truncated @str.
+ */
+static int tomoyo_truncate(char *str)
+{
+ char *start = str;
+ while (*(unsigned char *) str > (unsigned char) ' ')
+ str++;
+ *str = '\0';
+ return strlen(start) + 1;
+}
+
+/**
+ * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @header: Lines containing ACL.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
+{
+ char *buffer;
+ char *realpath = NULL;
+ char *argv0 = NULL;
+ char *symlink = NULL;
+ char *cp = strchr(header, '\n');
+ int len;
+ if (!cp)
+ return;
+ cp = strchr(cp + 1, '\n');
+ if (!cp)
+ return;
+ *cp++ = '\0';
+ len = strlen(cp) + 1;
+ /* strstr() will return NULL if ordering is wrong. */
+ if (*cp == 'f') {
+ argv0 = strstr(header, " argv[]={ \"");
+ if (argv0) {
+ argv0 += 10;
+ len += tomoyo_truncate(argv0) + 14;
+ }
+ realpath = strstr(header, " exec={ realpath=\"");
+ if (realpath) {
+ realpath += 8;
+ len += tomoyo_truncate(realpath) + 6;
+ }
+ symlink = strstr(header, " symlink.target=\"");
+ if (symlink)
+ len += tomoyo_truncate(symlink + 1) + 1;
+ }
+ buffer = kmalloc(len, GFP_NOFS);
+ if (!buffer)
+ return;
+ snprintf(buffer, len - 1, "%s", cp);
+ if (realpath)
+ tomoyo_addprintf(buffer, len, " exec.%s", realpath);
+ if (argv0)
+ tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
+ if (symlink)
+ tomoyo_addprintf(buffer, len, "%s", symlink);
+ tomoyo_normalize_line(buffer);
+ if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
+ false))
+ tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
+ kfree(buffer);
+}
+
+/**
+ * tomoyo_supervisor - Ask for the supervisor's decision.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns 0 if the supervisor decided to permit the access request which
+ * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
+ * supervisor decided to retry the access request which violated the policy in
+ * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
+ */
+int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
+{
+ va_list args;
+ int error;
+ int len;
+ static unsigned int tomoyo_serial;
+ struct tomoyo_query entry = { };
+ bool quota_exceeded = false;
+ va_start(args, fmt);
+ len = vsnprintf((char *) &len, 1, fmt, args) + 1;
+ va_end(args);
+ /* Write /sys/kernel/security/tomoyo/audit. */
+ va_start(args, fmt);
+ tomoyo_write_log2(r, len, fmt, args);
+ va_end(args);
+ /* Nothing more to do if granted. */
+ if (r->granted)
+ return 0;
+ if (r->mode)
+ tomoyo_update_stat(r->mode);
+ switch (r->mode) {
+ case TOMOYO_CONFIG_ENFORCING:
+ error = -EPERM;
+ if (atomic_read(&tomoyo_query_observers))
+ break;
+ goto out;
+ case TOMOYO_CONFIG_LEARNING:
+ error = 0;
+ /* Check max_learning_entry parameter. */
+ if (tomoyo_domain_quota_is_ok(r))
+ break;
+ /* fall through */
+ default:
+ return 0;
+ }
+ /* Get message. */
+ va_start(args, fmt);
+ entry.query = tomoyo_init_log(r, len, fmt, args);
+ va_end(args);
+ if (!entry.query)
+ goto out;
+ entry.query_len = strlen(entry.query) + 1;
+ if (!error) {
+ tomoyo_add_entry(r->domain, entry.query);
+ goto out;
+ }
+ len = tomoyo_round2(entry.query_len);
+ entry.domain = r->domain;
+ spin_lock(&tomoyo_query_list_lock);
+ if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
+ >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
+ quota_exceeded = true;
+ } else {
+ entry.serial = tomoyo_serial++;
+ entry.retry = r->retry;
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
+ list_add_tail(&entry.list, &tomoyo_query_list);
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (quota_exceeded)
+ goto out;
+ /* Give 10 seconds for supervisor's opinion. */
+ while (entry.timer < 10) {
+ wake_up_all(&tomoyo_query_wait);
+ if (wait_event_interruptible_timeout
+ (tomoyo_answer_wait, entry.answer ||
+ !atomic_read(&tomoyo_query_observers), HZ))
+ break;
+ else
+ entry.timer++;
+ }
+ spin_lock(&tomoyo_query_list_lock);
+ list_del(&entry.list);
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
+ spin_unlock(&tomoyo_query_list_lock);
+ switch (entry.answer) {
+ case 3: /* Asked to retry by administrator. */
+ error = TOMOYO_RETRY_REQUEST;
+ r->retry++;
+ break;
+ case 1:
+ /* Granted by administrator. */
+ error = 0;
+ break;
+ default:
+ /* Timed out or rejected by administrator. */
+ break;
+ }
+out:
+ kfree(entry.query);
+ return error;
+}
+
+/**
+ * tomoyo_find_domain_by_qid - Get domain by query id.
+ *
+ * @serial: Query ID assigned by tomoyo_supervisor().
+ *
+ * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
+ */
+static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
+(unsigned int serial)
+{
+ struct tomoyo_query *ptr;
+ struct tomoyo_domain_info *domain = NULL;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each_entry(ptr, &tomoyo_query_list, list) {
+ if (ptr->serial != serial || ptr->answer)
+ continue;
+ domain = ptr->domain;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ return domain;
+}
+
+/**
+ * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table".
+ *
+ * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
+ *
+ * Waits for access requests which violated policy in enforcing mode.
+ */
+static int tomoyo_poll_query(struct file *file, poll_table *wait)
+{
+ struct list_head *tmp;
+ bool found = false;
+ u8 i;
+ for (i = 0; i < 2; i++) {
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr =
+ list_entry(tmp, typeof(*ptr), list);
+ if (ptr->answer)
+ continue;
+ found = true;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (found)
+ return POLLIN | POLLRDNORM;
+ if (i)
+ break;
+ poll_wait(file, &tomoyo_query_wait, wait);
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ */
+static void tomoyo_read_query(struct tomoyo_io_buffer *head)
+{
+ struct list_head *tmp;
+ unsigned int pos = 0;
+ size_t len = 0;
+ char *buf;
+ if (head->r.w_pos)
+ return;
+ if (head->read_buf) {
+ kfree(head->read_buf);
+ head->read_buf = NULL;
+ }
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+ if (ptr->answer)
+ continue;
+ if (pos++ != head->r.query_index)
+ continue;
+ len = ptr->query_len;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (!len) {
+ head->r.query_index = 0;
+ return;
+ }
+ buf = kzalloc(len + 32, GFP_NOFS);
+ if (!buf)
+ return;
+ pos = 0;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+ if (ptr->answer)
+ continue;
+ if (pos++ != head->r.query_index)
+ continue;
+ /*
+ * Some query can be skipped because tomoyo_query_list
+ * can change, but I don't care.
+ */
+ if (len == ptr->query_len)
+ snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
+ ptr->retry, ptr->query);
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (buf[0]) {
+ head->read_buf = buf;
+ head->r.w[head->r.w_pos++] = buf;
+ head->r.query_index++;
+ } else {
+ kfree(buf);
+ }
+}
+
+/**
+ * tomoyo_write_answer - Write the supervisor's decision.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, -EINVAL otherwise.
+ */
+static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ struct list_head *tmp;
+ unsigned int serial;
+ unsigned int answer;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+ ptr->timer = 0;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
+ return -EINVAL;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+ if (ptr->serial != serial)
+ continue;
+ if (!ptr->answer)
+ ptr->answer = answer;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ return 0;
+}
+
+/**
+ * tomoyo_read_version: Get version.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns version information.
+ */
+static void tomoyo_read_version(struct tomoyo_io_buffer *head)
+{
+ if (!head->r.eof) {
+ tomoyo_io_printf(head, "2.5.0");
+ head->r.eof = true;
+ }
+}
+
+/* String table for /sys/kernel/security/tomoyo/stat interface. */
+static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
+ [TOMOYO_STAT_POLICY_UPDATES] = "update:",
+ [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
+ [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
+ [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
+};
+
+/* String table for /sys/kernel/security/tomoyo/stat interface. */
+static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
+ [TOMOYO_MEMORY_POLICY] = "policy:",
+ [TOMOYO_MEMORY_AUDIT] = "audit log:",
+ [TOMOYO_MEMORY_QUERY] = "query message:",
+};
+
+/* Timestamp counter for last updated. */
+static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
+/* Counter for number of updates. */
+static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
+
+/**
+ * tomoyo_update_stat - Update statistic counters.
+ *
+ * @index: Index for policy type.
+ *
+ * Returns nothing.
+ */
+void tomoyo_update_stat(const u8 index)
+{
+ struct timeval tv;
+ do_gettimeofday(&tv);
+ /*
+ * I don't use atomic operations because race condition is not fatal.
+ */
+ tomoyo_stat_updated[index]++;
+ tomoyo_stat_modified[index] = tv.tv_sec;
+}
+
+/**
+ * tomoyo_read_stat - Read statistic data.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
+{
+ u8 i;
+ unsigned int total = 0;
+ if (head->r.eof)
+ return;
+ for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
+ tomoyo_io_printf(head, "Policy %-30s %10u",
+ tomoyo_policy_headers[i],
+ tomoyo_stat_updated[i]);
+ if (tomoyo_stat_modified[i]) {
+ struct tomoyo_time stamp;
+ tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
+ tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
+ "%02u:%02u:%02u)",
+ stamp.year, stamp.month, stamp.day,
+ stamp.hour, stamp.min, stamp.sec);
+ }
+ tomoyo_set_lf(head);
+ }
+ for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
+ unsigned int used = tomoyo_memory_used[i];
+ total += used;
+ tomoyo_io_printf(head, "Memory used by %-22s %10u",
+ tomoyo_memory_headers[i], used);
+ used = tomoyo_memory_quota[i];
+ if (used)
+ tomoyo_io_printf(head, " (Quota: %10u)", used);
+ tomoyo_set_lf(head);
+ }
+ tomoyo_io_printf(head, "Total memory used: %10u\n",
+ total);
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_write_stat - Set memory quota.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ u8 i;
+ if (tomoyo_str_starts(&data, "Memory used by "))
+ for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
+ if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
+ sscanf(data, "%u", &tomoyo_memory_quota[i]);
+ return 0;
+}
+
+/**
+ * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @type: Type of interface.
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_open_control(const u8 type, struct file *file)
+{
+ struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
+
+ if (!head)
+ return -ENOMEM;
+ mutex_init(&head->io_sem);
+ head->type = type;
+ switch (type) {
+ case TOMOYO_DOMAINPOLICY:
+ /* /sys/kernel/security/tomoyo/domain_policy */
+ head->write = tomoyo_write_domain;
+ head->read = tomoyo_read_domain;
+ break;
+ case TOMOYO_EXCEPTIONPOLICY:
+ /* /sys/kernel/security/tomoyo/exception_policy */
+ head->write = tomoyo_write_exception;
+ head->read = tomoyo_read_exception;
+ break;
+ case TOMOYO_AUDIT:
+ /* /sys/kernel/security/tomoyo/audit */
+ head->poll = tomoyo_poll_log;
+ head->read = tomoyo_read_log;
+ break;
+ case TOMOYO_PROCESS_STATUS:
+ /* /sys/kernel/security/tomoyo/.process_status */
+ head->write = tomoyo_write_pid;
+ head->read = tomoyo_read_pid;
+ break;
+ case TOMOYO_VERSION:
+ /* /sys/kernel/security/tomoyo/version */
+ head->read = tomoyo_read_version;
+ head->readbuf_size = 128;
+ break;
+ case TOMOYO_STAT:
+ /* /sys/kernel/security/tomoyo/stat */
+ head->write = tomoyo_write_stat;
+ head->read = tomoyo_read_stat;
+ head->readbuf_size = 1024;
+ break;
+ case TOMOYO_PROFILE:
+ /* /sys/kernel/security/tomoyo/profile */
+ head->write = tomoyo_write_profile;
+ head->read = tomoyo_read_profile;
+ break;
+ case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
+ head->poll = tomoyo_poll_query;
+ head->write = tomoyo_write_answer;
+ head->read = tomoyo_read_query;
+ break;
+ case TOMOYO_MANAGER:
+ /* /sys/kernel/security/tomoyo/manager */
+ head->write = tomoyo_write_manager;
+ head->read = tomoyo_read_manager;
+ break;
+ }
+ if (!(file->f_mode & FMODE_READ)) {
+ /*
+ * No need to allocate read_buf since it is not opened
+ * for reading.
+ */
+ head->read = NULL;
+ head->poll = NULL;
+ } else if (!head->poll) {
+ /* Don't allocate read_buf for poll() access. */
+ if (!head->readbuf_size)
+ head->readbuf_size = 4096 * 2;
+ head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
+ if (!head->read_buf) {
+ kfree(head);
+ return -ENOMEM;
+ }
+ }
+ if (!(file->f_mode & FMODE_WRITE)) {
+ /*
+ * No need to allocate write_buf since it is not opened
+ * for writing.
+ */
+ head->write = NULL;
+ } else if (head->write) {
+ head->writebuf_size = 4096 * 2;
+ head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
+ if (!head->write_buf) {
+ kfree(head->read_buf);
+ kfree(head);
+ return -ENOMEM;
+ }
+ }
+ /*
+ * If the file is /sys/kernel/security/tomoyo/query , increment the
+ * observer counter.
+ * The obserber counter is used by tomoyo_supervisor() to see if
+ * there is some process monitoring /sys/kernel/security/tomoyo/query.
+ */
+ if (type == TOMOYO_QUERY)
+ atomic_inc(&tomoyo_query_observers);
+ file->private_data = head;
+ tomoyo_notify_gc(head, true);
+ return 0;
+}
+
+/**
+ * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table".
+ *
+ * Waits for read readiness.
+ * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
+ * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
+ */
+int tomoyo_poll_control(struct file *file, poll_table *wait)
+{
+ struct tomoyo_io_buffer *head = file->private_data;
+ if (!head->poll)
+ return -ENOSYS;
+ return head->poll(file, wait);
+}
+
+/**
+ * tomoyo_set_namespace_cursor - Set namespace to read.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
+{
+ struct list_head *ns;
+ if (head->type != TOMOYO_EXCEPTIONPOLICY &&
+ head->type != TOMOYO_PROFILE)
+ return;
+ /*
+ * If this is the first read, or reading previous namespace finished
+ * and has more namespaces to read, update the namespace cursor.
+ */
+ ns = head->r.ns;
+ if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
+ /* Clearing is OK because tomoyo_flush() returned true. */
+ memset(&head->r, 0, sizeof(head->r));
+ head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
+ }
+}
+
+/**
+ * tomoyo_has_more_namespace - Check for unread namespaces.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true if we have more entries to print, false otherwise.
+ */
+static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
+{
+ return (head->type == TOMOYO_EXCEPTIONPOLICY ||
+ head->type == TOMOYO_PROFILE) && head->r.eof &&
+ head->r.ns->next != &tomoyo_namespace_list;
+}
+
+/**
+ * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @buffer: Poiner to buffer to write to.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
+ const int buffer_len)
+{
+ int len;
+ int idx;
+
+ if (!head->read)
+ return -ENOSYS;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ head->read_user_buf = buffer;
+ head->read_user_buf_avail = buffer_len;
+ idx = tomoyo_read_lock();
+ if (tomoyo_flush(head))
+ /* Call the policy handler. */
+ do {
+ tomoyo_set_namespace_cursor(head);
+ head->read(head);
+ } while (tomoyo_flush(head) &&
+ tomoyo_has_more_namespace(head));
+ tomoyo_read_unlock(idx);
+ len = head->read_user_buf - buffer;
+ mutex_unlock(&head->io_sem);
+ return len;
+}
+
+/**
+ * tomoyo_parse_policy - Parse a policy line.
+ *
+ * @head: Poiter to "struct tomoyo_io_buffer".
+ * @line: Line to parse.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
+{
+ /* Delete request? */
+ head->w.is_delete = !strncmp(line, "delete ", 7);
+ if (head->w.is_delete)
+ memmove(line, line + 7, strlen(line + 7) + 1);
+ /* Selecting namespace to update. */
+ if (head->type == TOMOYO_EXCEPTIONPOLICY ||
+ head->type == TOMOYO_PROFILE) {
+ if (*line == '<') {
+ char *cp = strchr(line, ' ');
+ if (cp) {
+ *cp++ = '\0';
+ head->w.ns = tomoyo_assign_namespace(line);
+ memmove(line, cp, strlen(cp) + 1);
+ } else
+ head->w.ns = NULL;
+ } else
+ head->w.ns = &tomoyo_kernel_namespace;
+ /* Don't allow updating if namespace is invalid. */
+ if (!head->w.ns)
+ return -ENOENT;
+ }
+ /* Do the update. */
+ return head->write(head);
+}
+
+/**
+ * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @buffer: Pointer to buffer to read from.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns @buffer_len on success, negative value otherwise.
+ */
+ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
+ const char __user *buffer, const int buffer_len)
+{
+ int error = buffer_len;
+ size_t avail_len = buffer_len;
+ char *cp0 = head->write_buf;
+ int idx;
+ if (!head->write)
+ return -ENOSYS;
+ if (!access_ok(VERIFY_READ, buffer, buffer_len))
+ return -EFAULT;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ head->read_user_buf_avail = 0;
+ idx = tomoyo_read_lock();
+ /* Read a line and dispatch it to the policy handler. */
+ while (avail_len > 0) {
+ char c;
+ if (head->w.avail >= head->writebuf_size - 1) {
+ const int len = head->writebuf_size * 2;
+ char *cp = kzalloc(len, GFP_NOFS);
+ if (!cp) {
+ error = -ENOMEM;
+ break;
+ }
+ memmove(cp, cp0, head->w.avail);
+ kfree(cp0);
+ head->write_buf = cp;
+ cp0 = cp;
+ head->writebuf_size = len;
+ }
+ if (get_user(c, buffer)) {
+ error = -EFAULT;
+ break;
+ }
+ buffer++;
+ avail_len--;
+ cp0[head->w.avail++] = c;
+ if (c != '\n')
+ continue;
+ cp0[head->w.avail - 1] = '\0';
+ head->w.avail = 0;
+ tomoyo_normalize_line(cp0);
+ if (!strcmp(cp0, "reset")) {
+ head->w.ns = &tomoyo_kernel_namespace;
+ head->w.domain = NULL;
+ memset(&head->r, 0, sizeof(head->r));
+ continue;
+ }
+ /* Don't allow updating policies by non manager programs. */
+ switch (head->type) {
+ case TOMOYO_PROCESS_STATUS:
+ /* This does not write anything. */
+ break;
+ case TOMOYO_DOMAINPOLICY:
+ if (tomoyo_select_domain(head, cp0))
+ continue;
+ /* fall through */
+ case TOMOYO_EXCEPTIONPOLICY:
+ if (!strcmp(cp0, "select transition_only")) {
+ head->r.print_transition_related_only = true;
+ continue;
+ }
+ /* fall through */
+ default:
+ if (!tomoyo_manager()) {
+ error = -EPERM;
+ goto out;
+ }
+ }
+ switch (tomoyo_parse_policy(head, cp0)) {
+ case -EPERM:
+ error = -EPERM;
+ goto out;
+ case 0:
+ switch (head->type) {
+ case TOMOYO_DOMAINPOLICY:
+ case TOMOYO_EXCEPTIONPOLICY:
+ case TOMOYO_STAT:
+ case TOMOYO_PROFILE:
+ case TOMOYO_MANAGER:
+ tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
+ break;
+ default:
+ break;
+ }
+ break;
+ }
+ }
+out:
+ tomoyo_read_unlock(idx);
+ mutex_unlock(&head->io_sem);
+ return error;
+}
+
+/**
+ * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+int tomoyo_close_control(struct tomoyo_io_buffer *head)
+{
+ /*
+ * If the file is /sys/kernel/security/tomoyo/query , decrement the
+ * observer counter.
+ */
+ if (head->type == TOMOYO_QUERY &&
+ atomic_dec_and_test(&tomoyo_query_observers))
+ wake_up_all(&tomoyo_answer_wait);
+ tomoyo_notify_gc(head, false);
+ return 0;
+}
+
+/**
+ * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
+ */
+void tomoyo_check_profile(void)
+{
+ struct tomoyo_domain_info *domain;
+ const int idx = tomoyo_read_lock();
+ tomoyo_policy_loaded = true;
+ printk(KERN_INFO "TOMOYO: 2.5.0\n");
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
+ const u8 profile = domain->profile;
+ const struct tomoyo_policy_namespace *ns = domain->ns;
+ if (ns->profile_version != 20110903)
+ printk(KERN_ERR
+ "Profile version %u is not supported.\n",
+ ns->profile_version);
+ else if (!ns->profile_ptr[profile])
+ printk(KERN_ERR
+ "Profile %u (used by '%s') is not defined.\n",
+ profile, domain->domainname->name);
+ else
+ continue;
+ printk(KERN_ERR
+ "Userland tools for TOMOYO 2.5 must be installed and "
+ "policy must be initialized.\n");
+ printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.5/ "
+ "for more information.\n");
+ panic("STOP!");
+ }
+ tomoyo_read_unlock(idx);
+ printk(KERN_INFO "Mandatory Access Control activated.\n");
+}
+
+/**
+ * tomoyo_load_builtin_policy - Load built-in policy.
+ *
+ * Returns nothing.
+ */
+void __init tomoyo_load_builtin_policy(void)
+{
+ /*
+ * This include file is manually created and contains built-in policy
+ * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
+ * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
+ * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
+ */
+#include "builtin-policy.h"
+ u8 i;
+ const int idx = tomoyo_read_lock();
+ for (i = 0; i < 5; i++) {
+ struct tomoyo_io_buffer head = { };
+ char *start = "";
+ switch (i) {
+ case 0:
+ start = tomoyo_builtin_profile;
+ head.type = TOMOYO_PROFILE;
+ head.write = tomoyo_write_profile;
+ break;
+ case 1:
+ start = tomoyo_builtin_exception_policy;
+ head.type = TOMOYO_EXCEPTIONPOLICY;
+ head.write = tomoyo_write_exception;
+ break;
+ case 2:
+ start = tomoyo_builtin_domain_policy;
+ head.type = TOMOYO_DOMAINPOLICY;
+ head.write = tomoyo_write_domain;
+ break;
+ case 3:
+ start = tomoyo_builtin_manager;
+ head.type = TOMOYO_MANAGER;
+ head.write = tomoyo_write_manager;
+ break;
+ case 4:
+ start = tomoyo_builtin_stat;
+ head.type = TOMOYO_STAT;
+ head.write = tomoyo_write_stat;
+ break;
+ }
+ while (1) {
+ char *end = strchr(start, '\n');
+ if (!end)
+ break;
+ *end = '\0';
+ tomoyo_normalize_line(start);
+ head.write_buf = start;
+ tomoyo_parse_policy(&head, start);
+ start = end + 1;
+ }
+ }
+ tomoyo_read_unlock(idx);
+#ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ tomoyo_check_profile();
+#endif
+}
