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-rw-r--r--ANDROID_3.4.5/security/tomoyo/domain.c901
1 files changed, 0 insertions, 901 deletions
diff --git a/ANDROID_3.4.5/security/tomoyo/domain.c b/ANDROID_3.4.5/security/tomoyo/domain.c
deleted file mode 100644
index 38651454..00000000
--- a/ANDROID_3.4.5/security/tomoyo/domain.c
+++ /dev/null
@@ -1,901 +0,0 @@
-/*
- * security/tomoyo/domain.c
- *
- * Copyright (C) 2005-2011 NTT DATA CORPORATION
- */
-
-#include "common.h"
-#include <linux/binfmts.h>
-#include <linux/slab.h>
-
-/* Variables definitions.*/
-
-/* The initial domain. */
-struct tomoyo_domain_info tomoyo_kernel_domain;
-
-/**
- * tomoyo_update_policy - Update an entry for exception policy.
- *
- * @new_entry: Pointer to "struct tomoyo_acl_info".
- * @size: Size of @new_entry in bytes.
- * @param: Pointer to "struct tomoyo_acl_param".
- * @check_duplicate: Callback function to find duplicated entry.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
- struct tomoyo_acl_param *param,
- bool (*check_duplicate) (const struct tomoyo_acl_head
- *,
- const struct tomoyo_acl_head
- *))
-{
- int error = param->is_delete ? -ENOENT : -ENOMEM;
- struct tomoyo_acl_head *entry;
- struct list_head *list = param->list;
-
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- return -ENOMEM;
- list_for_each_entry_rcu(entry, list, list) {
- if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
- continue;
- if (!check_duplicate(entry, new_entry))
- continue;
- entry->is_deleted = param->is_delete;
- error = 0;
- break;
- }
- if (error && !param->is_delete) {
- entry = tomoyo_commit_ok(new_entry, size);
- if (entry) {
- list_add_tail_rcu(&entry->list, list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
- return error;
-}
-
-/**
- * tomoyo_same_acl_head - Check for duplicated "struct tomoyo_acl_info" entry.
- *
- * @a: Pointer to "struct tomoyo_acl_info".
- * @b: Pointer to "struct tomoyo_acl_info".
- *
- * Returns true if @a == @b, false otherwise.
- */
-static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *a,
- const struct tomoyo_acl_info *b)
-{
- return a->type == b->type && a->cond == b->cond;
-}
-
-/**
- * tomoyo_update_domain - Update an entry for domain policy.
- *
- * @new_entry: Pointer to "struct tomoyo_acl_info".
- * @size: Size of @new_entry in bytes.
- * @param: Pointer to "struct tomoyo_acl_param".
- * @check_duplicate: Callback function to find duplicated entry.
- * @merge_duplicate: Callback function to merge duplicated entry.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
- struct tomoyo_acl_param *param,
- bool (*check_duplicate) (const struct tomoyo_acl_info
- *,
- const struct tomoyo_acl_info
- *),
- bool (*merge_duplicate) (struct tomoyo_acl_info *,
- struct tomoyo_acl_info *,
- const bool))
-{
- const bool is_delete = param->is_delete;
- int error = is_delete ? -ENOENT : -ENOMEM;
- struct tomoyo_acl_info *entry;
- struct list_head * const list = param->list;
-
- if (param->data[0]) {
- new_entry->cond = tomoyo_get_condition(param);
- if (!new_entry->cond)
- return -EINVAL;
- /*
- * Domain transition preference is allowed for only
- * "file execute" entries.
- */
- if (new_entry->cond->transit &&
- !(new_entry->type == TOMOYO_TYPE_PATH_ACL &&
- container_of(new_entry, struct tomoyo_path_acl, head)
- ->perm == 1 << TOMOYO_TYPE_EXECUTE))
- goto out;
- }
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- list_for_each_entry_rcu(entry, list, list) {
- if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
- continue;
- if (!tomoyo_same_acl_head(entry, new_entry) ||
- !check_duplicate(entry, new_entry))
- continue;
- if (merge_duplicate)
- entry->is_deleted = merge_duplicate(entry, new_entry,
- is_delete);
- else
- entry->is_deleted = is_delete;
- error = 0;
- break;
- }
- if (error && !is_delete) {
- entry = tomoyo_commit_ok(new_entry, size);
- if (entry) {
- list_add_tail_rcu(&entry->list, list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
-out:
- tomoyo_put_condition(new_entry->cond);
- return error;
-}
-
-/**
- * tomoyo_check_acl - Do permission check.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @check_entry: Callback function to check type specific parameters.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-void tomoyo_check_acl(struct tomoyo_request_info *r,
- bool (*check_entry) (struct tomoyo_request_info *,
- const struct tomoyo_acl_info *))
-{
- const struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
- bool retried = false;
- const struct list_head *list = &domain->acl_info_list;
-
-retry:
- list_for_each_entry_rcu(ptr, list, list) {
- if (ptr->is_deleted || ptr->type != r->param_type)
- continue;
- if (!check_entry(r, ptr))
- continue;
- if (!tomoyo_condition(r, ptr->cond))
- continue;
- r->matched_acl = ptr;
- r->granted = true;
- return;
- }
- if (!retried) {
- retried = true;
- list = &domain->ns->acl_group[domain->group];
- goto retry;
- }
- r->granted = false;
-}
-
-/* The list for "struct tomoyo_domain_info". */
-LIST_HEAD(tomoyo_domain_list);
-
-/**
- * tomoyo_last_word - Get last component of a domainname.
- *
- * @name: Domainname to check.
- *
- * Returns the last word of @domainname.
- */
-static const char *tomoyo_last_word(const char *name)
-{
- const char *cp = strrchr(name, ' ');
- if (cp)
- return cp + 1;
- return name;
-}
-
-/**
- * tomoyo_same_transition_control - Check for duplicated "struct tomoyo_transition_control" 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_transition_control(const struct tomoyo_acl_head *a,
- const struct tomoyo_acl_head *b)
-{
- const struct tomoyo_transition_control *p1 = container_of(a,
- typeof(*p1),
- head);
- const struct tomoyo_transition_control *p2 = container_of(b,
- typeof(*p2),
- head);
- return p1->type == p2->type && p1->is_last_name == p2->is_last_name
- && p1->domainname == p2->domainname
- && p1->program == p2->program;
-}
-
-/**
- * tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- * @type: Type of this entry.
- *
- * Returns 0 on success, negative value otherwise.
- */
-int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
- const u8 type)
-{
- struct tomoyo_transition_control e = { .type = type };
- int error = param->is_delete ? -ENOENT : -ENOMEM;
- char *program = param->data;
- char *domainname = strstr(program, " from ");
- if (domainname) {
- *domainname = '\0';
- domainname += 6;
- } else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP ||
- type == TOMOYO_TRANSITION_CONTROL_KEEP) {
- domainname = program;
- program = NULL;
- }
- if (program && strcmp(program, "any")) {
- if (!tomoyo_correct_path(program))
- return -EINVAL;
- e.program = tomoyo_get_name(program);
- if (!e.program)
- goto out;
- }
- if (domainname && strcmp(domainname, "any")) {
- if (!tomoyo_correct_domain(domainname)) {
- if (!tomoyo_correct_path(domainname))
- goto out;
- e.is_last_name = true;
- }
- e.domainname = tomoyo_get_name(domainname);
- if (!e.domainname)
- goto out;
- }
- param->list = &param->ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
- error = tomoyo_update_policy(&e.head, sizeof(e), param,
- tomoyo_same_transition_control);
-out:
- tomoyo_put_name(e.domainname);
- tomoyo_put_name(e.program);
- return error;
-}
-
-/**
- * tomoyo_scan_transition - Try to find specific domain transition type.
- *
- * @list: Pointer to "struct list_head".
- * @domainname: The name of current domain.
- * @program: The name of requested program.
- * @last_name: The last component of @domainname.
- * @type: One of values in "enum tomoyo_transition_type".
- *
- * Returns true if found one, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static inline bool tomoyo_scan_transition
-(const struct list_head *list, const struct tomoyo_path_info *domainname,
- const struct tomoyo_path_info *program, const char *last_name,
- const enum tomoyo_transition_type type)
-{
- const struct tomoyo_transition_control *ptr;
- list_for_each_entry_rcu(ptr, list, head.list) {
- if (ptr->head.is_deleted || ptr->type != type)
- continue;
- if (ptr->domainname) {
- if (!ptr->is_last_name) {
- if (ptr->domainname != domainname)
- continue;
- } else {
- /*
- * Use direct strcmp() since this is
- * unlikely used.
- */
- if (strcmp(ptr->domainname->name, last_name))
- continue;
- }
- }
- if (ptr->program && tomoyo_pathcmp(ptr->program, program))
- continue;
- return true;
- }
- return false;
-}
-
-/**
- * tomoyo_transition_type - Get domain transition type.
- *
- * @ns: Pointer to "struct tomoyo_policy_namespace".
- * @domainname: The name of current domain.
- * @program: The name of requested program.
- *
- * Returns TOMOYO_TRANSITION_CONTROL_TRANSIT if executing @program causes
- * domain transition across namespaces, TOMOYO_TRANSITION_CONTROL_INITIALIZE if
- * executing @program reinitializes domain transition within that namespace,
- * TOMOYO_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
- * others otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static enum tomoyo_transition_type tomoyo_transition_type
-(const struct tomoyo_policy_namespace *ns,
- const struct tomoyo_path_info *domainname,
- const struct tomoyo_path_info *program)
-{
- const char *last_name = tomoyo_last_word(domainname->name);
- enum tomoyo_transition_type type = TOMOYO_TRANSITION_CONTROL_NO_RESET;
- while (type < TOMOYO_MAX_TRANSITION_TYPE) {
- const struct list_head * const list =
- &ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
- if (!tomoyo_scan_transition(list, domainname, program,
- last_name, type)) {
- type++;
- continue;
- }
- if (type != TOMOYO_TRANSITION_CONTROL_NO_RESET &&
- type != TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE)
- break;
- /*
- * Do not check for reset_domain if no_reset_domain matched.
- * Do not check for initialize_domain if no_initialize_domain
- * matched.
- */
- type++;
- type++;
- }
- return type;
-}
-
-/**
- * tomoyo_same_aggregator - Check for duplicated "struct tomoyo_aggregator" 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_aggregator(const struct tomoyo_acl_head *a,
- const struct tomoyo_acl_head *b)
-{
- const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1),
- head);
- const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2),
- head);
- return p1->original_name == p2->original_name &&
- p1->aggregated_name == p2->aggregated_name;
-}
-
-/**
- * tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list.
- *
- * @param: Pointer to "struct tomoyo_acl_param".
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_write_aggregator(struct tomoyo_acl_param *param)
-{
- struct tomoyo_aggregator e = { };
- int error = param->is_delete ? -ENOENT : -ENOMEM;
- const char *original_name = tomoyo_read_token(param);
- const char *aggregated_name = tomoyo_read_token(param);
- if (!tomoyo_correct_word(original_name) ||
- !tomoyo_correct_path(aggregated_name))
- return -EINVAL;
- e.original_name = tomoyo_get_name(original_name);
- e.aggregated_name = tomoyo_get_name(aggregated_name);
- if (!e.original_name || !e.aggregated_name ||
- e.aggregated_name->is_patterned) /* No patterns allowed. */
- goto out;
- param->list = &param->ns->policy_list[TOMOYO_ID_AGGREGATOR];
- error = tomoyo_update_policy(&e.head, sizeof(e), param,
- tomoyo_same_aggregator);
-out:
- tomoyo_put_name(e.original_name);
- tomoyo_put_name(e.aggregated_name);
- return error;
-}
-
-/**
- * tomoyo_find_namespace - Find specified namespace.
- *
- * @name: Name of namespace to find.
- * @len: Length of @name.
- *
- * Returns pointer to "struct tomoyo_policy_namespace" if found,
- * NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static struct tomoyo_policy_namespace *tomoyo_find_namespace
-(const char *name, const unsigned int len)
-{
- struct tomoyo_policy_namespace *ns;
- list_for_each_entry(ns, &tomoyo_namespace_list, namespace_list) {
- if (strncmp(name, ns->name, len) ||
- (name[len] && name[len] != ' '))
- continue;
- return ns;
- }
- return NULL;
-}
-
-/**
- * tomoyo_assign_namespace - Create a new namespace.
- *
- * @domainname: Name of namespace to create.
- *
- * Returns pointer to "struct tomoyo_policy_namespace" on success,
- * NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-struct tomoyo_policy_namespace *tomoyo_assign_namespace(const char *domainname)
-{
- struct tomoyo_policy_namespace *ptr;
- struct tomoyo_policy_namespace *entry;
- const char *cp = domainname;
- unsigned int len = 0;
- while (*cp && *cp++ != ' ')
- len++;
- ptr = tomoyo_find_namespace(domainname, len);
- if (ptr)
- return ptr;
- if (len >= TOMOYO_EXEC_TMPSIZE - 10 || !tomoyo_domain_def(domainname))
- return NULL;
- entry = kzalloc(sizeof(*entry) + len + 1, GFP_NOFS);
- if (!entry)
- return NULL;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- ptr = tomoyo_find_namespace(domainname, len);
- if (!ptr && tomoyo_memory_ok(entry)) {
- char *name = (char *) (entry + 1);
- ptr = entry;
- memmove(name, domainname, len);
- name[len] = '\0';
- entry->name = name;
- tomoyo_init_policy_namespace(entry);
- entry = NULL;
- }
- mutex_unlock(&tomoyo_policy_lock);
-out:
- kfree(entry);
- return ptr;
-}
-
-/**
- * tomoyo_namespace_jump - Check for namespace jump.
- *
- * @domainname: Name of domain.
- *
- * Returns true if namespace differs, false otherwise.
- */
-static bool tomoyo_namespace_jump(const char *domainname)
-{
- const char *namespace = tomoyo_current_namespace()->name;
- const int len = strlen(namespace);
- return strncmp(domainname, namespace, len) ||
- (domainname[len] && domainname[len] != ' ');
-}
-
-/**
- * tomoyo_assign_domain - Create a domain or a namespace.
- *
- * @domainname: The name of domain.
- * @transit: True if transit to domain found or created.
- *
- * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
- const bool transit)
-{
- struct tomoyo_domain_info e = { };
- struct tomoyo_domain_info *entry = tomoyo_find_domain(domainname);
- bool created = false;
- if (entry) {
- if (transit) {
- /*
- * Since namespace is created at runtime, profiles may
- * not be created by the moment the process transits to
- * that domain. Do not perform domain transition if
- * profile for that domain is not yet created.
- */
- if (tomoyo_policy_loaded &&
- !entry->ns->profile_ptr[entry->profile])
- return NULL;
- }
- return entry;
- }
- /* Requested domain does not exist. */
- /* Don't create requested domain if domainname is invalid. */
- if (strlen(domainname) >= TOMOYO_EXEC_TMPSIZE - 10 ||
- !tomoyo_correct_domain(domainname))
- return NULL;
- /*
- * Since definition of profiles and acl_groups may differ across
- * namespaces, do not inherit "use_profile" and "use_group" settings
- * by automatically creating requested domain upon domain transition.
- */
- if (transit && tomoyo_namespace_jump(domainname))
- return NULL;
- e.ns = tomoyo_assign_namespace(domainname);
- if (!e.ns)
- return NULL;
- /*
- * "use_profile" and "use_group" settings for automatically created
- * domains are inherited from current domain. These are 0 for manually
- * created domains.
- */
- if (transit) {
- const struct tomoyo_domain_info *domain = tomoyo_domain();
- e.profile = domain->profile;
- e.group = domain->group;
- }
- e.domainname = tomoyo_get_name(domainname);
- if (!e.domainname)
- return NULL;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- entry = tomoyo_find_domain(domainname);
- if (!entry) {
- entry = tomoyo_commit_ok(&e, sizeof(e));
- if (entry) {
- INIT_LIST_HEAD(&entry->acl_info_list);
- list_add_tail_rcu(&entry->list, &tomoyo_domain_list);
- created = true;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
-out:
- tomoyo_put_name(e.domainname);
- if (entry && transit) {
- if (created) {
- struct tomoyo_request_info r;
- tomoyo_init_request_info(&r, entry,
- TOMOYO_MAC_FILE_EXECUTE);
- r.granted = false;
- tomoyo_write_log(&r, "use_profile %u\n",
- entry->profile);
- tomoyo_write_log(&r, "use_group %u\n", entry->group);
- tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
- }
- }
- return entry;
-}
-
-/**
- * tomoyo_environ - Check permission for environment variable names.
- *
- * @ee: Pointer to "struct tomoyo_execve".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_environ(struct tomoyo_execve *ee)
-{
- struct tomoyo_request_info *r = &ee->r;
- struct linux_binprm *bprm = ee->bprm;
- /* env_page.data is allocated by tomoyo_dump_page(). */
- struct tomoyo_page_dump env_page = { };
- char *arg_ptr; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
- int arg_len = 0;
- unsigned long pos = bprm->p;
- int offset = pos % PAGE_SIZE;
- int argv_count = bprm->argc;
- int envp_count = bprm->envc;
- int error = -ENOMEM;
-
- ee->r.type = TOMOYO_MAC_ENVIRON;
- ee->r.profile = r->domain->profile;
- ee->r.mode = tomoyo_get_mode(r->domain->ns, ee->r.profile,
- TOMOYO_MAC_ENVIRON);
- if (!r->mode || !envp_count)
- return 0;
- arg_ptr = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
- if (!arg_ptr)
- goto out;
- while (error == -ENOMEM) {
- if (!tomoyo_dump_page(bprm, pos, &env_page))
- goto out;
- pos += PAGE_SIZE - offset;
- /* Read. */
- while (argv_count && offset < PAGE_SIZE) {
- if (!env_page.data[offset++])
- argv_count--;
- }
- if (argv_count) {
- offset = 0;
- continue;
- }
- while (offset < PAGE_SIZE) {
- const unsigned char c = env_page.data[offset++];
-
- if (c && arg_len < TOMOYO_EXEC_TMPSIZE - 10) {
- if (c == '=') {
- arg_ptr[arg_len++] = '\0';
- } else if (c == '\\') {
- arg_ptr[arg_len++] = '\\';
- arg_ptr[arg_len++] = '\\';
- } else if (c > ' ' && c < 127) {
- arg_ptr[arg_len++] = c;
- } else {
- arg_ptr[arg_len++] = '\\';
- arg_ptr[arg_len++] = (c >> 6) + '0';
- arg_ptr[arg_len++]
- = ((c >> 3) & 7) + '0';
- arg_ptr[arg_len++] = (c & 7) + '0';
- }
- } else {
- arg_ptr[arg_len] = '\0';
- }
- if (c)
- continue;
- if (tomoyo_env_perm(r, arg_ptr)) {
- error = -EPERM;
- break;
- }
- if (!--envp_count) {
- error = 0;
- break;
- }
- arg_len = 0;
- }
- offset = 0;
- }
-out:
- if (r->mode != TOMOYO_CONFIG_ENFORCING)
- error = 0;
- kfree(env_page.data);
- kfree(arg_ptr);
- return error;
-}
-
-/**
- * tomoyo_find_next_domain - Find a domain.
- *
- * @bprm: Pointer to "struct linux_binprm".
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_find_next_domain(struct linux_binprm *bprm)
-{
- struct tomoyo_domain_info *old_domain = tomoyo_domain();
- struct tomoyo_domain_info *domain = NULL;
- const char *original_name = bprm->filename;
- int retval = -ENOMEM;
- bool reject_on_transition_failure = false;
- const struct tomoyo_path_info *candidate;
- struct tomoyo_path_info exename;
- struct tomoyo_execve *ee = kzalloc(sizeof(*ee), GFP_NOFS);
-
- if (!ee)
- return -ENOMEM;
- ee->tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
- if (!ee->tmp) {
- kfree(ee);
- return -ENOMEM;
- }
- /* ee->dump->data is allocated by tomoyo_dump_page(). */
- tomoyo_init_request_info(&ee->r, NULL, TOMOYO_MAC_FILE_EXECUTE);
- ee->r.ee = ee;
- ee->bprm = bprm;
- ee->r.obj = &ee->obj;
- ee->obj.path1 = bprm->file->f_path;
- /* Get symlink's pathname of program. */
- retval = -ENOENT;
- exename.name = tomoyo_realpath_nofollow(original_name);
- if (!exename.name)
- goto out;
- tomoyo_fill_path_info(&exename);
-retry:
- /* Check 'aggregator' directive. */
- {
- struct tomoyo_aggregator *ptr;
- struct list_head *list =
- &old_domain->ns->policy_list[TOMOYO_ID_AGGREGATOR];
- /* Check 'aggregator' directive. */
- candidate = &exename;
- list_for_each_entry_rcu(ptr, list, head.list) {
- if (ptr->head.is_deleted ||
- !tomoyo_path_matches_pattern(&exename,
- ptr->original_name))
- continue;
- candidate = ptr->aggregated_name;
- break;
- }
- }
-
- /* Check execute permission. */
- retval = tomoyo_execute_permission(&ee->r, candidate);
- if (retval == TOMOYO_RETRY_REQUEST)
- goto retry;
- if (retval < 0)
- goto out;
- /*
- * To be able to specify domainnames with wildcards, use the
- * pathname specified in the policy (which may contain
- * wildcard) rather than the pathname passed to execve()
- * (which never contains wildcard).
- */
- if (ee->r.param.path.matched_path)
- candidate = ee->r.param.path.matched_path;
-
- /*
- * Check for domain transition preference if "file execute" matched.
- * If preference is given, make do_execve() fail if domain transition
- * has failed, for domain transition preference should be used with
- * destination domain defined.
- */
- if (ee->transition) {
- const char *domainname = ee->transition->name;
- reject_on_transition_failure = true;
- if (!strcmp(domainname, "keep"))
- goto force_keep_domain;
- if (!strcmp(domainname, "child"))
- goto force_child_domain;
- if (!strcmp(domainname, "reset"))
- goto force_reset_domain;
- if (!strcmp(domainname, "initialize"))
- goto force_initialize_domain;
- if (!strcmp(domainname, "parent")) {
- char *cp;
- strncpy(ee->tmp, old_domain->domainname->name,
- TOMOYO_EXEC_TMPSIZE - 1);
- cp = strrchr(ee->tmp, ' ');
- if (cp)
- *cp = '\0';
- } else if (*domainname == '<')
- strncpy(ee->tmp, domainname, TOMOYO_EXEC_TMPSIZE - 1);
- else
- snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
- old_domain->domainname->name, domainname);
- goto force_jump_domain;
- }
- /*
- * No domain transition preference specified.
- * Calculate domain to transit to.
- */
- switch (tomoyo_transition_type(old_domain->ns, old_domain->domainname,
- candidate)) {
- case TOMOYO_TRANSITION_CONTROL_RESET:
-force_reset_domain:
- /* Transit to the root of specified namespace. */
- snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "<%s>",
- candidate->name);
- /*
- * Make do_execve() fail if domain transition across namespaces
- * has failed.
- */
- reject_on_transition_failure = true;
- break;
- case TOMOYO_TRANSITION_CONTROL_INITIALIZE:
-force_initialize_domain:
- /* Transit to the child of current namespace's root. */
- snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
- old_domain->ns->name, candidate->name);
- break;
- case TOMOYO_TRANSITION_CONTROL_KEEP:
-force_keep_domain:
- /* Keep current domain. */
- domain = old_domain;
- break;
- default:
- if (old_domain == &tomoyo_kernel_domain &&
- !tomoyo_policy_loaded) {
- /*
- * Needn't to transit from kernel domain before
- * starting /sbin/init. But transit from kernel domain
- * if executing initializers because they might start
- * before /sbin/init.
- */
- domain = old_domain;
- break;
- }
-force_child_domain:
- /* Normal domain transition. */
- snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
- old_domain->domainname->name, candidate->name);
- break;
- }
-force_jump_domain:
- if (!domain)
- domain = tomoyo_assign_domain(ee->tmp, true);
- if (domain)
- retval = 0;
- else if (reject_on_transition_failure) {
- printk(KERN_WARNING "ERROR: Domain '%s' not ready.\n",
- ee->tmp);
- retval = -ENOMEM;
- } else if (ee->r.mode == TOMOYO_CONFIG_ENFORCING)
- retval = -ENOMEM;
- else {
- retval = 0;
- if (!old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED]) {
- old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED] = true;
- ee->r.granted = false;
- tomoyo_write_log(&ee->r, "%s", tomoyo_dif
- [TOMOYO_DIF_TRANSITION_FAILED]);
- printk(KERN_WARNING
- "ERROR: Domain '%s' not defined.\n", ee->tmp);
- }
- }
- out:
- if (!domain)
- domain = old_domain;
- /* Update reference count on "struct tomoyo_domain_info". */
- atomic_inc(&domain->users);
- bprm->cred->security = domain;
- kfree(exename.name);
- if (!retval) {
- ee->r.domain = domain;
- retval = tomoyo_environ(ee);
- }
- kfree(ee->tmp);
- kfree(ee->dump.data);
- kfree(ee);
- return retval;
-}
-
-/**
- * tomoyo_dump_page - Dump a page to buffer.
- *
- * @bprm: Pointer to "struct linux_binprm".
- * @pos: Location to dump.
- * @dump: Poiner to "struct tomoyo_page_dump".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
- struct tomoyo_page_dump *dump)
-{
- struct page *page;
-
- /* dump->data is released by tomoyo_find_next_domain(). */
- if (!dump->data) {
- dump->data = kzalloc(PAGE_SIZE, GFP_NOFS);
- if (!dump->data)
- return false;
- }
- /* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */
-#ifdef CONFIG_MMU
- if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0)
- return false;
-#else
- page = bprm->page[pos / PAGE_SIZE];
-#endif
- if (page != dump->page) {
- const unsigned int offset = pos % PAGE_SIZE;
- /*
- * Maybe kmap()/kunmap() should be used here.
- * But remove_arg_zero() uses kmap_atomic()/kunmap_atomic().
- * So do I.
- */
- char *kaddr = kmap_atomic(page);
-
- dump->page = page;
- memcpy(dump->data + offset, kaddr + offset,
- PAGE_SIZE - offset);
- kunmap_atomic(kaddr);
- }
- /* Same with put_arg_page(page) in fs/exec.c */
-#ifdef CONFIG_MMU
- put_page(page);
-#endif
- return true;
-}
generated by cgit (git 2.34.1) at 2025-07-04 16:03:09 +0000