found at <https://tomoyo.sourceforge.net/>.
If you are unsure how to answer this question, answer N.
-config SECURITY_TOMOYO_LKM
- bool "Cut out most of TOMOYO's code to a loadable kernel module"
- default n
- depends on SECURITY_TOMOYO
- depends on MODULES
- help
- Say Y here if you want to include TOMOYO without bloating
- vmlinux file. If you say Y, most of TOMOYO code is cut out to
- a loadable kernel module named tomoyo.ko . This option will be
- useful for kernels built by Linux distributors where TOMOYO is
- included but TOMOYO is not enabled by default. Please be sure
- to explicitly load tomoyo.ko if you want to activate TOMOYO
- without calling userspace policy loader, for tomoyo.ko is
- loaded immediately before calling userspace policy loader.
-
config SECURITY_TOMOYO_MAX_ACCEPT_ENTRY
int "Default maximal count for learning mode"
default 2048
# SPDX-License-Identifier: GPL-2.0
-tomoyo-objs := audit.o common.o condition.o domain.o environ.o file.o gc.o group.o memory.o mount.o network.o proxy.o realpath.o securityfs_if.o util.o
-obj-y += init.o load_policy.o
-ifdef CONFIG_SECURITY_TOMOYO_LKM
-obj-m += tomoyo.o
-else
-obj-y += tomoyo.o
-endif
+obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o load_policy.o memory.o mount.o network.o realpath.o securityfs_if.o tomoyo.o util.o
targets += builtin-policy.h
p = find_task_by_pid_ns(pid, &init_pid_ns);
else
p = find_task_by_vpid(pid);
- if (p) {
+ if (p)
domain = tomoyo_task(p)->domain_info;
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
- if (!domain)
- domain = &tomoyo_kernel_domain;
-#endif
- }
rcu_read_unlock();
} else if (!strncmp(data, "domain=", 7)) {
if (tomoyo_domain_def(data + 7))
p = find_task_by_pid_ns(pid, &init_pid_ns);
else
p = find_task_by_vpid(pid);
- if (p) {
+ if (p)
domain = tomoyo_task(p)->domain_info;
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
- if (!domain)
- domain = &tomoyo_kernel_domain;
-#endif
- }
rcu_read_unlock();
if (!domain)
return;
int tomoyo_init_request_info(struct tomoyo_request_info *r,
struct tomoyo_domain_info *domain,
const u8 index);
-int __init tomoyo_interface_init(void);
int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
const unsigned int mode, unsigned int dev);
int tomoyo_mount_permission(const char *dev_name, const struct path *path,
*
* Returns pointer to "struct tomoyo_task" for specified thread.
*/
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
-extern struct tomoyo_task *tomoyo_task(struct task_struct *task);
-#else
static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
{
return task->security + tomoyo_blob_sizes.lbs_task;
}
-#endif
/**
* tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
pos = srcu_dereference((head)->next, &tomoyo_ss); \
for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
-
-#define LSM_HOOK(RET, DEFAULT, NAME, ...) typedef RET (NAME##_t)(__VA_ARGS__);
-#include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
-
-struct tomoyo_hooks {
- cred_prepare_t *cred_prepare;
- bprm_committed_creds_t *bprm_committed_creds;
- task_alloc_t *task_alloc;
- task_free_t *task_free;
- bprm_check_security_t *bprm_check_security;
- file_fcntl_t *file_fcntl;
- file_open_t *file_open;
- file_truncate_t *file_truncate;
- path_truncate_t *path_truncate;
- path_unlink_t *path_unlink;
- path_mkdir_t *path_mkdir;
- path_rmdir_t *path_rmdir;
- path_symlink_t *path_symlink;
- path_mknod_t *path_mknod;
- path_link_t *path_link;
- path_rename_t *path_rename;
- inode_getattr_t *inode_getattr;
- file_ioctl_t *file_ioctl;
- file_ioctl_compat_t *file_ioctl_compat;
- path_chmod_t *path_chmod;
- path_chown_t *path_chown;
- path_chroot_t *path_chroot;
- sb_mount_t *sb_mount;
- sb_umount_t *sb_umount;
- sb_pivotroot_t *sb_pivotroot;
- socket_bind_t *socket_bind;
- socket_connect_t *socket_connect;
- socket_listen_t *socket_listen;
- socket_sendmsg_t *socket_sendmsg;
-};
-
-extern void tomoyo_register_hooks(const struct tomoyo_hooks *tomoyo_hooks);
-
-struct tomoyo_operations {
- void (*check_profile)(void);
- int enabled;
-};
-
-extern struct tomoyo_operations tomoyo_ops;
-
-/*
- * Temporary hack: functions needed by tomoyo.ko . This will be removed
- * after all functions are marked as EXPORT_STMBOL_GPL().
- */
-struct tomoyo_tmp_exports {
- struct task_struct * (*find_task_by_vpid)(pid_t nr);
- struct task_struct * (*find_task_by_pid_ns)(pid_t nr, struct pid_namespace *ns);
- void (*put_filesystem)(struct file_system_type *fs);
- struct file * (*get_mm_exe_file)(struct mm_struct *mm);
- char * (*d_absolute_path)(const struct path *path, char *buf, int buflen);
-};
-extern const struct tomoyo_tmp_exports tomoyo_tmp_exports;
-#define find_task_by_vpid tomoyo_tmp_exports.find_task_by_vpid
-#define find_task_by_pid_ns tomoyo_tmp_exports.find_task_by_pid_ns
-#define put_filesystem tomoyo_tmp_exports.put_filesystem
-#define get_mm_exe_file tomoyo_tmp_exports.get_mm_exe_file
-#define d_absolute_path tomoyo_tmp_exports.d_absolute_path
-
-#endif /* defined(CONFIG_SECURITY_TOMOYO_LKM) */
-
#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
#include <linux/kthread.h>
#include <linux/slab.h>
-/* Lock for GC. */
-DEFINE_SRCU(tomoyo_ss);
-
/**
* tomoyo_memory_free - Free memory for elements.
*
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * security/tomoyo/hooks.h
- *
- * Copyright (C) 2005-2011 NTT DATA CORPORATION
- */
-
-#include "common.h"
-
-/**
- * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
- *
- * Returns pointer to "struct tomoyo_domain_info" for current thread.
- */
-struct tomoyo_domain_info *tomoyo_domain(void)
-{
- struct tomoyo_task *s = tomoyo_task(current);
-
- return s->domain_info;
-}
-
-/**
- * tomoyo_cred_prepare - Target for security_prepare_creds().
- *
- * @new: Pointer to "struct cred".
- * @old: Pointer to "struct cred".
- * @gfp: Memory allocation flags.
- *
- * Returns 0.
- */
-static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
- gfp_t gfp)
-{
- /* Restore old_domain_info saved by previous execve() request. */
- struct tomoyo_task *s = tomoyo_task(current);
-
- if (s->old_domain_info && !current->in_execve) {
- atomic_dec(&s->domain_info->users);
- s->domain_info = s->old_domain_info;
- s->old_domain_info = NULL;
- }
- return 0;
-}
-
-/**
- * tomoyo_bprm_committed_creds - Target for security_bprm_committed_creds().
- *
- * @bprm: Pointer to "struct linux_binprm".
- */
-static void tomoyo_bprm_committed_creds(const struct linux_binprm *bprm)
-{
- /* Clear old_domain_info saved by execve() request. */
- struct tomoyo_task *s = tomoyo_task(current);
-
- atomic_dec(&s->old_domain_info->users);
- s->old_domain_info = NULL;
-}
-
-/**
- * tomoyo_bprm_check_security - Target for security_bprm_check().
- *
- * @bprm: Pointer to "struct linux_binprm".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
-{
- struct tomoyo_task *s = tomoyo_task(current);
-
- /*
- * Execute permission is checked against pathname passed to execve()
- * using current domain.
- */
- if (!s->old_domain_info) {
- const int idx = tomoyo_read_lock();
- const int err = tomoyo_find_next_domain(bprm);
-
- tomoyo_read_unlock(idx);
- return err;
- }
- /*
- * Read permission is checked against interpreters using next domain.
- */
- return tomoyo_check_open_permission(s->domain_info,
- &bprm->file->f_path, O_RDONLY);
-}
-
-/**
- * tomoyo_inode_getattr - Target for security_inode_getattr().
- *
- * @path: Pointer to "struct path".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_inode_getattr(const struct path *path)
-{
- return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, path, NULL);
-}
-
-/**
- * tomoyo_path_truncate - Target for security_path_truncate().
- *
- * @path: Pointer to "struct path".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_truncate(const struct path *path)
-{
- return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL);
-}
-
-/**
- * tomoyo_file_truncate - Target for security_file_truncate().
- *
- * @file: Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_file_truncate(struct file *file)
-{
- return tomoyo_path_truncate(&file->f_path);
-}
-
-/**
- * tomoyo_path_unlink - Target for security_path_unlink().
- *
- * @parent: Pointer to "struct path".
- * @dentry: Pointer to "struct dentry".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry)
-{
- struct path path = { .mnt = parent->mnt, .dentry = dentry };
-
- return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL);
-}
-
-/**
- * tomoyo_path_mkdir - Target for security_path_mkdir().
- *
- * @parent: Pointer to "struct path".
- * @dentry: Pointer to "struct dentry".
- * @mode: DAC permission mode.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry,
- umode_t mode)
-{
- struct path path = { .mnt = parent->mnt, .dentry = dentry };
-
- return tomoyo_path_number_perm(TOMOYO_TYPE_MKDIR, &path,
- mode & S_IALLUGO);
-}
-
-/**
- * tomoyo_path_rmdir - Target for security_path_rmdir().
- *
- * @parent: Pointer to "struct path".
- * @dentry: Pointer to "struct dentry".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry)
-{
- struct path path = { .mnt = parent->mnt, .dentry = dentry };
-
- return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL);
-}
-
-/**
- * tomoyo_path_symlink - Target for security_path_symlink().
- *
- * @parent: Pointer to "struct path".
- * @dentry: Pointer to "struct dentry".
- * @old_name: Symlink's content.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry,
- const char *old_name)
-{
- struct path path = { .mnt = parent->mnt, .dentry = dentry };
-
- return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name);
-}
-
-/**
- * tomoyo_path_mknod - Target for security_path_mknod().
- *
- * @parent: Pointer to "struct path".
- * @dentry: Pointer to "struct dentry".
- * @mode: DAC permission mode.
- * @dev: Device attributes.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry,
- umode_t mode, unsigned int dev)
-{
- struct path path = { .mnt = parent->mnt, .dentry = dentry };
- int type = TOMOYO_TYPE_CREATE;
- const unsigned int perm = mode & S_IALLUGO;
-
- switch (mode & S_IFMT) {
- case S_IFCHR:
- type = TOMOYO_TYPE_MKCHAR;
- break;
- case S_IFBLK:
- type = TOMOYO_TYPE_MKBLOCK;
- break;
- default:
- goto no_dev;
- }
- return tomoyo_mkdev_perm(type, &path, perm, dev);
- no_dev:
- switch (mode & S_IFMT) {
- case S_IFIFO:
- type = TOMOYO_TYPE_MKFIFO;
- break;
- case S_IFSOCK:
- type = TOMOYO_TYPE_MKSOCK;
- break;
- }
- return tomoyo_path_number_perm(type, &path, perm);
-}
-
-/**
- * tomoyo_path_link - Target for security_path_link().
- *
- * @old_dentry: Pointer to "struct dentry".
- * @new_dir: Pointer to "struct path".
- * @new_dentry: Pointer to "struct dentry".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir,
- struct dentry *new_dentry)
-{
- struct path path1 = { .mnt = new_dir->mnt, .dentry = old_dentry };
- struct path path2 = { .mnt = new_dir->mnt, .dentry = new_dentry };
-
- return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2);
-}
-
-/**
- * tomoyo_path_rename - Target for security_path_rename().
- *
- * @old_parent: Pointer to "struct path".
- * @old_dentry: Pointer to "struct dentry".
- * @new_parent: Pointer to "struct path".
- * @new_dentry: Pointer to "struct dentry".
- * @flags: Rename options.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_rename(const struct path *old_parent,
- struct dentry *old_dentry,
- const struct path *new_parent,
- struct dentry *new_dentry,
- const unsigned int flags)
-{
- struct path path1 = { .mnt = old_parent->mnt, .dentry = old_dentry };
- struct path path2 = { .mnt = new_parent->mnt, .dentry = new_dentry };
-
- if (flags & RENAME_EXCHANGE) {
- const int err = tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path2,
- &path1);
-
- if (err)
- return err;
- }
- return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2);
-}
-
-/**
- * tomoyo_file_fcntl - Target for security_file_fcntl().
- *
- * @file: Pointer to "struct file".
- * @cmd: Command for fcntl().
- * @arg: Argument for @cmd.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)))
- return 0;
- return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path,
- O_WRONLY | (arg & O_APPEND));
-}
-
-/**
- * tomoyo_file_open - Target for security_file_open().
- *
- * @f: Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_file_open(struct file *f)
-{
- /* Don't check read permission here if called from execve(). */
- /* Illogically, FMODE_EXEC is in f_flags, not f_mode. */
- if (f->f_flags & __FMODE_EXEC)
- return 0;
- return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path,
- f->f_flags);
-}
-
-/**
- * tomoyo_file_ioctl - Target for security_file_ioctl().
- *
- * @file: Pointer to "struct file".
- * @cmd: Command for ioctl().
- * @arg: Argument for @cmd.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_file_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd);
-}
-
-/**
- * tomoyo_path_chmod - Target for security_path_chmod().
- *
- * @path: Pointer to "struct path".
- * @mode: DAC permission mode.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_chmod(const struct path *path, umode_t mode)
-{
- return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path,
- mode & S_IALLUGO);
-}
-
-/**
- * tomoyo_path_chown - Target for security_path_chown().
- *
- * @path: Pointer to "struct path".
- * @uid: Owner ID.
- * @gid: Group ID.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
-{
- int error = 0;
-
- if (uid_valid(uid))
- error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path,
- from_kuid(&init_user_ns, uid));
- if (!error && gid_valid(gid))
- error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path,
- from_kgid(&init_user_ns, gid));
- return error;
-}
-
-/**
- * tomoyo_path_chroot - Target for security_path_chroot().
- *
- * @path: Pointer to "struct path".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_path_chroot(const struct path *path)
-{
- return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL);
-}
-
-/**
- * tomoyo_sb_mount - Target for security_sb_mount().
- *
- * @dev_name: Name of device file. Maybe NULL.
- * @path: Pointer to "struct path".
- * @type: Name of filesystem type. Maybe NULL.
- * @flags: Mount options.
- * @data: Optional data. Maybe NULL.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_sb_mount(const char *dev_name, const struct path *path,
- const char *type, unsigned long flags, void *data)
-{
- return tomoyo_mount_permission(dev_name, path, type, flags, data);
-}
-
-/**
- * tomoyo_sb_umount - Target for security_sb_umount().
- *
- * @mnt: Pointer to "struct vfsmount".
- * @flags: Unmount options.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
-{
- struct path path = { .mnt = mnt, .dentry = mnt->mnt_root };
-
- return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL);
-}
-
-/**
- * tomoyo_sb_pivotroot - Target for security_sb_pivotroot().
- *
- * @old_path: Pointer to "struct path".
- * @new_path: Pointer to "struct path".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path)
-{
- return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path);
-}
-
-/**
- * tomoyo_socket_listen - Check permission for listen().
- *
- * @sock: Pointer to "struct socket".
- * @backlog: Backlog parameter.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_socket_listen(struct socket *sock, int backlog)
-{
- return tomoyo_socket_listen_permission(sock);
-}
-
-/**
- * tomoyo_socket_connect - Check permission for connect().
- *
- * @sock: Pointer to "struct socket".
- * @addr: Pointer to "struct sockaddr".
- * @addr_len: Size of @addr.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr,
- int addr_len)
-{
- return tomoyo_socket_connect_permission(sock, addr, addr_len);
-}
-
-/**
- * tomoyo_socket_bind - Check permission for bind().
- *
- * @sock: Pointer to "struct socket".
- * @addr: Pointer to "struct sockaddr".
- * @addr_len: Size of @addr.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr,
- int addr_len)
-{
- return tomoyo_socket_bind_permission(sock, addr, addr_len);
-}
-
-/**
- * tomoyo_socket_sendmsg - Check permission for sendmsg().
- *
- * @sock: Pointer to "struct socket".
- * @msg: Pointer to "struct msghdr".
- * @size: Size of message.
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg,
- int size)
-{
- return tomoyo_socket_sendmsg_permission(sock, msg, size);
-}
-
-/**
- * tomoyo_task_alloc - Target for security_task_alloc().
- *
- * @task: Pointer to "struct task_struct".
- * @clone_flags: clone() flags.
- *
- * Returns 0.
- */
-static int tomoyo_task_alloc(struct task_struct *task,
- unsigned long clone_flags)
-{
- struct tomoyo_task *old = tomoyo_task(current);
- struct tomoyo_task *new = tomoyo_task(task);
-
- new->domain_info = old->domain_info;
- atomic_inc(&new->domain_info->users);
- new->old_domain_info = NULL;
- return 0;
-}
-
-/**
- * tomoyo_task_free - Target for security_task_free().
- *
- * @task: Pointer to "struct task_struct".
- */
-static void tomoyo_task_free(struct task_struct *task)
-{
- struct tomoyo_task *s = tomoyo_task(task);
-
- if (s->domain_info) {
- atomic_dec(&s->domain_info->users);
- s->domain_info = NULL;
- }
- if (s->old_domain_info) {
- atomic_dec(&s->old_domain_info->users);
- s->old_domain_info = NULL;
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * security/tomoyo/init.c
- *
- * Copyright (C) 2005-2011 NTT DATA CORPORATION
- */
-
-#include <linux/lsm_hooks.h>
-#include <uapi/linux/lsm.h>
-#include "common.h"
-
-#ifndef CONFIG_SECURITY_TOMOYO_LKM
-
-#include "hooks.h"
-
-#else
-
-#define DEFINE_STATIC_CALL_PROXY(NAME) \
- static NAME##_t tomoyo_##NAME; \
- DEFINE_STATIC_CALL_RET0(tomoyo_##NAME, tomoyo_##NAME);
-DEFINE_STATIC_CALL_PROXY(cred_prepare)
-DEFINE_STATIC_CALL_PROXY(bprm_committed_creds)
-DEFINE_STATIC_CALL_PROXY(bprm_check_security)
-DEFINE_STATIC_CALL_PROXY(inode_getattr)
-DEFINE_STATIC_CALL_PROXY(path_truncate)
-DEFINE_STATIC_CALL_PROXY(file_truncate)
-DEFINE_STATIC_CALL_PROXY(path_unlink)
-DEFINE_STATIC_CALL_PROXY(path_mkdir)
-DEFINE_STATIC_CALL_PROXY(path_rmdir)
-DEFINE_STATIC_CALL_PROXY(path_symlink)
-DEFINE_STATIC_CALL_PROXY(path_mknod)
-DEFINE_STATIC_CALL_PROXY(path_link)
-DEFINE_STATIC_CALL_PROXY(path_rename)
-DEFINE_STATIC_CALL_PROXY(file_fcntl)
-DEFINE_STATIC_CALL_PROXY(file_open)
-DEFINE_STATIC_CALL_PROXY(file_ioctl)
-DEFINE_STATIC_CALL_PROXY(path_chmod)
-DEFINE_STATIC_CALL_PROXY(path_chown)
-DEFINE_STATIC_CALL_PROXY(path_chroot)
-DEFINE_STATIC_CALL_PROXY(sb_mount)
-DEFINE_STATIC_CALL_PROXY(sb_umount)
-DEFINE_STATIC_CALL_PROXY(sb_pivotroot)
-DEFINE_STATIC_CALL_PROXY(socket_listen)
-DEFINE_STATIC_CALL_PROXY(socket_connect)
-DEFINE_STATIC_CALL_PROXY(socket_bind)
-DEFINE_STATIC_CALL_PROXY(socket_sendmsg)
-DEFINE_STATIC_CALL_PROXY(task_alloc)
-DEFINE_STATIC_CALL_PROXY(task_free)
-#undef DEFINE_STATIC_CALL_PROXY
-
-static int tomoyo_cred_prepare(struct cred *new, const struct cred *old, gfp_t gfp)
-{
- return static_call(tomoyo_cred_prepare)(new, old, gfp);
-}
-
-static void tomoyo_bprm_committed_creds(const struct linux_binprm *bprm)
-{
- static_call(tomoyo_bprm_committed_creds)(bprm);
-}
-
-static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
-{
- return static_call(tomoyo_bprm_check_security)(bprm);
-}
-
-static int tomoyo_inode_getattr(const struct path *path)
-{
- return static_call(tomoyo_inode_getattr)(path);
-}
-
-static int tomoyo_path_truncate(const struct path *path)
-{
- return static_call(tomoyo_path_truncate)(path);
-}
-
-static int tomoyo_file_truncate(struct file *file)
-{
- return static_call(tomoyo_file_truncate)(file);
-}
-
-static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry)
-{
- return static_call(tomoyo_path_unlink)(parent, dentry);
-}
-
-static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry, umode_t mode)
-{
- return static_call(tomoyo_path_mkdir)(parent, dentry, mode);
-}
-
-static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry)
-{
- return static_call(tomoyo_path_rmdir)(parent, dentry);
-}
-
-static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry,
- const char *old_name)
-{
- return static_call(tomoyo_path_symlink)(parent, dentry, old_name);
-}
-
-static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry,
- umode_t mode, unsigned int dev)
-{
- return static_call(tomoyo_path_mknod)(parent, dentry, mode, dev);
-}
-
-static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir,
- struct dentry *new_dentry)
-{
- return static_call(tomoyo_path_link)(old_dentry, new_dir, new_dentry);
-}
-
-static int tomoyo_path_rename(const struct path *old_parent, struct dentry *old_dentry,
- const struct path *new_parent, struct dentry *new_dentry,
- const unsigned int flags)
-{
- return static_call(tomoyo_path_rename)(old_parent, old_dentry, new_parent, new_dentry, flags);
-}
-
-static int tomoyo_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- return static_call(tomoyo_file_fcntl)(file, cmd, arg);
-}
-
-static int tomoyo_file_open(struct file *f)
-{
- return static_call(tomoyo_file_open)(f);
-}
-
-static int tomoyo_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- return static_call(tomoyo_file_ioctl)(file, cmd, arg);
-}
-
-static int tomoyo_path_chmod(const struct path *path, umode_t mode)
-{
- return static_call(tomoyo_path_chmod)(path, mode);
-}
-
-static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
-{
- return static_call(tomoyo_path_chown)(path, uid, gid);
-}
-
-static int tomoyo_path_chroot(const struct path *path)
-{
- return static_call(tomoyo_path_chroot)(path);
-}
-
-static int tomoyo_sb_mount(const char *dev_name, const struct path *path,
- const char *type, unsigned long flags, void *data)
-{
- return static_call(tomoyo_sb_mount)(dev_name, path, type, flags, data);
-}
-
-static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
-{
- return static_call(tomoyo_sb_umount)(mnt, flags);
-}
-
-static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path)
-{
- return static_call(tomoyo_sb_pivotroot)(old_path, new_path);
-}
-
-static int tomoyo_socket_listen(struct socket *sock, int backlog)
-{
- return static_call(tomoyo_socket_listen)(sock, backlog);
-}
-
-static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr, int addr_len)
-{
- return static_call(tomoyo_socket_connect)(sock, addr, addr_len);
-}
-
-static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
-{
- return static_call(tomoyo_socket_bind)(sock, addr, addr_len);
-}
-
-static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
-{
- return static_call(tomoyo_socket_sendmsg)(sock, msg, size);
-}
-
-static int tomoyo_task_alloc(struct task_struct *task, unsigned long clone_flags)
-{
- return static_call(tomoyo_task_alloc)(task, clone_flags);
-}
-
-static void tomoyo_task_free(struct task_struct *task)
-{
- static_call(tomoyo_task_free)(task);
-}
-
-void tomoyo_register_hooks(const struct tomoyo_hooks *tomoyo_hooks)
-{
- static void *registered;
-
- if (cmpxchg(®istered, NULL, ®istered))
- panic("%s was called twice!\n", __func__);
- static_call_update(tomoyo_task_free, tomoyo_hooks->task_free);
- static_call_update(tomoyo_task_alloc, tomoyo_hooks->task_alloc);
- static_call_update(tomoyo_cred_prepare, tomoyo_hooks->cred_prepare);
- static_call_update(tomoyo_bprm_committed_creds, tomoyo_hooks->bprm_committed_creds);
- static_call_update(tomoyo_bprm_check_security, tomoyo_hooks->bprm_check_security);
- static_call_update(tomoyo_inode_getattr, tomoyo_hooks->inode_getattr);
- static_call_update(tomoyo_path_truncate, tomoyo_hooks->path_truncate);
- static_call_update(tomoyo_file_truncate, tomoyo_hooks->file_truncate);
- static_call_update(tomoyo_path_unlink, tomoyo_hooks->path_unlink);
- static_call_update(tomoyo_path_mkdir, tomoyo_hooks->path_mkdir);
- static_call_update(tomoyo_path_rmdir, tomoyo_hooks->path_rmdir);
- static_call_update(tomoyo_path_symlink, tomoyo_hooks->path_symlink);
- static_call_update(tomoyo_path_mknod, tomoyo_hooks->path_mknod);
- static_call_update(tomoyo_path_link, tomoyo_hooks->path_link);
- static_call_update(tomoyo_path_rename, tomoyo_hooks->path_rename);
- static_call_update(tomoyo_file_fcntl, tomoyo_hooks->file_fcntl);
- static_call_update(tomoyo_file_open, tomoyo_hooks->file_open);
- static_call_update(tomoyo_file_ioctl, tomoyo_hooks->file_ioctl);
- static_call_update(tomoyo_path_chmod, tomoyo_hooks->path_chmod);
- static_call_update(tomoyo_path_chown, tomoyo_hooks->path_chown);
- static_call_update(tomoyo_path_chroot, tomoyo_hooks->path_chroot);
- static_call_update(tomoyo_sb_mount, tomoyo_hooks->sb_mount);
- static_call_update(tomoyo_sb_umount, tomoyo_hooks->sb_umount);
- static_call_update(tomoyo_sb_pivotroot, tomoyo_hooks->sb_pivotroot);
- static_call_update(tomoyo_socket_listen, tomoyo_hooks->socket_listen);
- static_call_update(tomoyo_socket_connect, tomoyo_hooks->socket_connect);
- static_call_update(tomoyo_socket_bind, tomoyo_hooks->socket_bind);
- static_call_update(tomoyo_socket_sendmsg, tomoyo_hooks->socket_sendmsg);
-}
-EXPORT_SYMBOL_GPL(tomoyo_register_hooks);
-
-/*
- * Temporary hack: functions needed by tomoyo.ko . This hack will be removed
- * after all functions are marked as EXPORT_STMBOL_GPL().
- */
-#undef find_task_by_vpid
-#undef find_task_by_pid_ns
-#undef put_filesystem
-#undef get_mm_exe_file
-#undef d_absolute_path
-const struct tomoyo_tmp_exports tomoyo_tmp_exports = {
- .find_task_by_vpid = find_task_by_vpid,
- .find_task_by_pid_ns = find_task_by_pid_ns,
- .put_filesystem = put_filesystem,
- .get_mm_exe_file = get_mm_exe_file,
- .d_absolute_path = d_absolute_path,
-};
-EXPORT_SYMBOL_GPL(tomoyo_tmp_exports);
-
-#endif
-
-#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
-static int tomoyo_bprm_creds_for_exec(struct linux_binprm *bprm)
-{
- /*
- * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested
- * for the first time.
- */
- if (!tomoyo_policy_loaded)
- tomoyo_load_policy(bprm->filename);
- return 0;
-}
-#endif
-
-struct lsm_blob_sizes tomoyo_blob_sizes __ro_after_init = {
- .lbs_task = sizeof(struct tomoyo_task),
-};
-
-static const struct lsm_id tomoyo_lsmid = {
- .name = "tomoyo",
- .id = LSM_ID_TOMOYO,
-};
-
-/* tomoyo_hooks is used for registering TOMOYO. */
-static struct security_hook_list tomoyo_hooks[] __ro_after_init = {
- LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare),
- LSM_HOOK_INIT(bprm_committed_creds, tomoyo_bprm_committed_creds),
- LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc),
- LSM_HOOK_INIT(task_free, tomoyo_task_free),
-#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
- LSM_HOOK_INIT(bprm_creds_for_exec, tomoyo_bprm_creds_for_exec),
-#endif
- LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security),
- LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl),
- LSM_HOOK_INIT(file_open, tomoyo_file_open),
- LSM_HOOK_INIT(file_truncate, tomoyo_file_truncate),
- LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate),
- LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink),
- LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir),
- LSM_HOOK_INIT(path_rmdir, tomoyo_path_rmdir),
- LSM_HOOK_INIT(path_symlink, tomoyo_path_symlink),
- LSM_HOOK_INIT(path_mknod, tomoyo_path_mknod),
- LSM_HOOK_INIT(path_link, tomoyo_path_link),
- LSM_HOOK_INIT(path_rename, tomoyo_path_rename),
- LSM_HOOK_INIT(inode_getattr, tomoyo_inode_getattr),
- LSM_HOOK_INIT(file_ioctl, tomoyo_file_ioctl),
- LSM_HOOK_INIT(file_ioctl_compat, tomoyo_file_ioctl),
- LSM_HOOK_INIT(path_chmod, tomoyo_path_chmod),
- LSM_HOOK_INIT(path_chown, tomoyo_path_chown),
- LSM_HOOK_INIT(path_chroot, tomoyo_path_chroot),
- LSM_HOOK_INIT(sb_mount, tomoyo_sb_mount),
- LSM_HOOK_INIT(sb_umount, tomoyo_sb_umount),
- LSM_HOOK_INIT(sb_pivotroot, tomoyo_sb_pivotroot),
- LSM_HOOK_INIT(socket_bind, tomoyo_socket_bind),
- LSM_HOOK_INIT(socket_connect, tomoyo_socket_connect),
- LSM_HOOK_INIT(socket_listen, tomoyo_socket_listen),
- LSM_HOOK_INIT(socket_sendmsg, tomoyo_socket_sendmsg),
-};
-
-int tomoyo_enabled __ro_after_init = 1;
-
-/* Has /sbin/init started? */
-bool tomoyo_policy_loaded;
-
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
-EXPORT_SYMBOL_GPL(tomoyo_blob_sizes);
-EXPORT_SYMBOL_GPL(tomoyo_policy_loaded);
-
-struct tomoyo_operations tomoyo_ops;
-EXPORT_SYMBOL_GPL(tomoyo_ops);
-
-/**
- * tomoyo_init - Reserve hooks for TOMOYO Linux.
- *
- * Returns 0.
- */
-static int __init tomoyo_init(void)
-{
- /* register ourselves with the security framework */
- security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks), &tomoyo_lsmid);
- tomoyo_ops.enabled = tomoyo_enabled;
- pr_info("Hooks for initializing TOMOYO Linux are ready\n");
- return 0;
-}
-#else
-/**
- * tomoyo_init - Register TOMOYO Linux as a LSM module.
- *
- * Returns 0.
- */
-static int __init tomoyo_init(void)
-{
- struct tomoyo_task *s = tomoyo_task(current);
-
- /* register ourselves with the security framework */
- security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks),
- &tomoyo_lsmid);
- pr_info("TOMOYO Linux initialized\n");
- s->domain_info = &tomoyo_kernel_domain;
- atomic_inc(&tomoyo_kernel_domain.users);
- s->old_domain_info = NULL;
- tomoyo_mm_init();
-
- return 0;
-}
-#endif
-
-DEFINE_LSM(tomoyo) = {
- .name = "tomoyo",
- .enabled = &tomoyo_enabled,
- .flags = LSM_FLAG_LEGACY_MAJOR,
- .blobs = &tomoyo_blob_sizes,
- .init = tomoyo_init,
-};
if (!tomoyo_policy_loader_exists())
return;
done = true;
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
- /* Load tomoyo.ko if not yet loaded. */
- if (!tomoyo_ops.check_profile)
- request_module("tomoyo");
- /* Check if tomoyo.ko was successfully loaded. */
- if (!tomoyo_ops.check_profile)
- panic("Failed to load tomoyo module.");
-#endif
pr_info("Calling %s to load policy. Please wait.\n", tomoyo_loader);
argv[0] = (char *) tomoyo_loader;
argv[1] = NULL;
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
envp[2] = NULL;
call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
- tomoyo_ops.check_profile();
-#else
tomoyo_check_profile();
-#endif
}
#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * security/tomoyo/proxy.c
- *
- * Copyright (C) 2005-2011 NTT DATA CORPORATION
- */
-
-#include <linux/security.h>
-#include "common.h"
-
-#ifdef CONFIG_SECURITY_TOMOYO_LKM
-
-struct tomoyo_task *tomoyo_task(struct task_struct *task)
-{
- struct tomoyo_task *s = task->security + tomoyo_blob_sizes.lbs_task;
-
- if (unlikely(!s->domain_info)) {
- if (likely(task == current)) {
- s->domain_info = &tomoyo_kernel_domain;
- atomic_inc(&tomoyo_kernel_domain.users);
- } else {
- /* Caller handles s->domain_info == NULL case. */
- }
- }
- return s;
-}
-
-#include "hooks.h"
-
-/**
- * tomoyo_runtime_init - Register TOMOYO Linux as a loadable LSM module.
- *
- * Returns 0 if TOMOYO is enabled, -EINVAL otherwise.
- */
-static int __init tomoyo_runtime_init(void)
-{
- const struct tomoyo_hooks tomoyo_hooks = {
- .cred_prepare = tomoyo_cred_prepare,
- .bprm_committed_creds = tomoyo_bprm_committed_creds,
- .task_alloc = tomoyo_task_alloc,
- .task_free = tomoyo_task_free,
- .bprm_check_security = tomoyo_bprm_check_security,
- .file_fcntl = tomoyo_file_fcntl,
- .file_open = tomoyo_file_open,
- .file_truncate = tomoyo_file_truncate,
- .path_truncate = tomoyo_path_truncate,
- .path_unlink = tomoyo_path_unlink,
- .path_mkdir = tomoyo_path_mkdir,
- .path_rmdir = tomoyo_path_rmdir,
- .path_symlink = tomoyo_path_symlink,
- .path_mknod = tomoyo_path_mknod,
- .path_link = tomoyo_path_link,
- .path_rename = tomoyo_path_rename,
- .inode_getattr = tomoyo_inode_getattr,
- .file_ioctl = tomoyo_file_ioctl,
- .file_ioctl_compat = tomoyo_file_ioctl,
- .path_chmod = tomoyo_path_chmod,
- .path_chown = tomoyo_path_chown,
- .path_chroot = tomoyo_path_chroot,
- .sb_mount = tomoyo_sb_mount,
- .sb_umount = tomoyo_sb_umount,
- .sb_pivotroot = tomoyo_sb_pivotroot,
- .socket_bind = tomoyo_socket_bind,
- .socket_connect = tomoyo_socket_connect,
- .socket_listen = tomoyo_socket_listen,
- .socket_sendmsg = tomoyo_socket_sendmsg,
- };
-
- if (!tomoyo_ops.enabled)
- return -EINVAL;
- tomoyo_ops.check_profile = tomoyo_check_profile;
- pr_info("TOMOYO Linux initialized\n");
- tomoyo_task(current);
- tomoyo_mm_init();
- tomoyo_interface_init();
- tomoyo_register_hooks(&tomoyo_hooks);
- return 0;
-}
-module_init(tomoyo_runtime_init);
-MODULE_LICENSE("GPL");
-
-#endif
}
/**
- * tomoyo_interface_init - Initialize /sys/kernel/security/tomoyo/ interface.
+ * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
*
* Returns 0.
*/
-int __init tomoyo_interface_init(void)
+static int __init tomoyo_initerface_init(void)
{
struct tomoyo_domain_info *domain;
struct dentry *tomoyo_dir;
-#ifndef CONFIG_SECURITY_TOMOYO_LKM
if (!tomoyo_enabled)
return 0;
-#endif
domain = tomoyo_domain();
/* Don't create securityfs entries unless registered. */
if (domain != &tomoyo_kernel_domain)
return 0;
}
-#ifndef CONFIG_SECURITY_TOMOYO_LKM
-fs_initcall(tomoyo_interface_init);
-#endif
+fs_initcall(tomoyo_initerface_init);
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/tomoyo.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/lsm_hooks.h>
+#include <uapi/linux/lsm.h>
+#include "common.h"
+
+/**
+ * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" for current thread.
+ */
+struct tomoyo_domain_info *tomoyo_domain(void)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ if (s->old_domain_info && !current->in_execve) {
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+ }
+ return s->domain_info;
+}
+
+/**
+ * tomoyo_cred_prepare - Target for security_prepare_creds().
+ *
+ * @new: Pointer to "struct cred".
+ * @old: Pointer to "struct cred".
+ * @gfp: Memory allocation flags.
+ *
+ * Returns 0.
+ */
+static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
+ gfp_t gfp)
+{
+ /* Restore old_domain_info saved by previous execve() request. */
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ if (s->old_domain_info && !current->in_execve) {
+ atomic_dec(&s->domain_info->users);
+ s->domain_info = s->old_domain_info;
+ s->old_domain_info = NULL;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_bprm_committed_creds - Target for security_bprm_committed_creds().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ */
+static void tomoyo_bprm_committed_creds(const struct linux_binprm *bprm)
+{
+ /* Clear old_domain_info saved by execve() request. */
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+}
+
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+/**
+ * tomoyo_bprm_creds_for_exec - Target for security_bprm_creds_for_exec().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0.
+ */
+static int tomoyo_bprm_creds_for_exec(struct linux_binprm *bprm)
+{
+ /*
+ * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested
+ * for the first time.
+ */
+ if (!tomoyo_policy_loaded)
+ tomoyo_load_policy(bprm->filename);
+ return 0;
+}
+#endif
+
+/**
+ * tomoyo_bprm_check_security - Target for security_bprm_check().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ /*
+ * Execute permission is checked against pathname passed to execve()
+ * using current domain.
+ */
+ if (!s->old_domain_info) {
+ const int idx = tomoyo_read_lock();
+ const int err = tomoyo_find_next_domain(bprm);
+
+ tomoyo_read_unlock(idx);
+ return err;
+ }
+ /*
+ * Read permission is checked against interpreters using next domain.
+ */
+ return tomoyo_check_open_permission(s->domain_info,
+ &bprm->file->f_path, O_RDONLY);
+}
+
+/**
+ * tomoyo_inode_getattr - Target for security_inode_getattr().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_inode_getattr(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, path, NULL);
+}
+
+/**
+ * tomoyo_path_truncate - Target for security_path_truncate().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_truncate(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL);
+}
+
+/**
+ * tomoyo_file_truncate - Target for security_file_truncate().
+ *
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_truncate(struct file *file)
+{
+ return tomoyo_path_truncate(&file->f_path);
+}
+
+/**
+ * tomoyo_path_unlink - Target for security_path_unlink().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL);
+}
+
+/**
+ * tomoyo_path_mkdir - Target for security_path_mkdir().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @mode: DAC permission mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry,
+ umode_t mode)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_number_perm(TOMOYO_TYPE_MKDIR, &path,
+ mode & S_IALLUGO);
+}
+
+/**
+ * tomoyo_path_rmdir - Target for security_path_rmdir().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL);
+}
+
+/**
+ * tomoyo_path_symlink - Target for security_path_symlink().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @old_name: Symlink's content.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry,
+ const char *old_name)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name);
+}
+
+/**
+ * tomoyo_path_mknod - Target for security_path_mknod().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @mode: DAC permission mode.
+ * @dev: Device attributes.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry,
+ umode_t mode, unsigned int dev)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+ int type = TOMOYO_TYPE_CREATE;
+ const unsigned int perm = mode & S_IALLUGO;
+
+ switch (mode & S_IFMT) {
+ case S_IFCHR:
+ type = TOMOYO_TYPE_MKCHAR;
+ break;
+ case S_IFBLK:
+ type = TOMOYO_TYPE_MKBLOCK;
+ break;
+ default:
+ goto no_dev;
+ }
+ return tomoyo_mkdev_perm(type, &path, perm, dev);
+ no_dev:
+ switch (mode & S_IFMT) {
+ case S_IFIFO:
+ type = TOMOYO_TYPE_MKFIFO;
+ break;
+ case S_IFSOCK:
+ type = TOMOYO_TYPE_MKSOCK;
+ break;
+ }
+ return tomoyo_path_number_perm(type, &path, perm);
+}
+
+/**
+ * tomoyo_path_link - Target for security_path_link().
+ *
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_dir: Pointer to "struct path".
+ * @new_dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir,
+ struct dentry *new_dentry)
+{
+ struct path path1 = { .mnt = new_dir->mnt, .dentry = old_dentry };
+ struct path path2 = { .mnt = new_dir->mnt, .dentry = new_dentry };
+
+ return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2);
+}
+
+/**
+ * tomoyo_path_rename - Target for security_path_rename().
+ *
+ * @old_parent: Pointer to "struct path".
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_parent: Pointer to "struct path".
+ * @new_dentry: Pointer to "struct dentry".
+ * @flags: Rename options.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_rename(const struct path *old_parent,
+ struct dentry *old_dentry,
+ const struct path *new_parent,
+ struct dentry *new_dentry,
+ const unsigned int flags)
+{
+ struct path path1 = { .mnt = old_parent->mnt, .dentry = old_dentry };
+ struct path path2 = { .mnt = new_parent->mnt, .dentry = new_dentry };
+
+ if (flags & RENAME_EXCHANGE) {
+ const int err = tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path2,
+ &path1);
+
+ if (err)
+ return err;
+ }
+ return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2);
+}
+
+/**
+ * tomoyo_file_fcntl - Target for security_file_fcntl().
+ *
+ * @file: Pointer to "struct file".
+ * @cmd: Command for fcntl().
+ * @arg: Argument for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)))
+ return 0;
+ return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path,
+ O_WRONLY | (arg & O_APPEND));
+}
+
+/**
+ * tomoyo_file_open - Target for security_file_open().
+ *
+ * @f: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_open(struct file *f)
+{
+ /* Don't check read permission here if called from execve(). */
+ /* Illogically, FMODE_EXEC is in f_flags, not f_mode. */
+ if (f->f_flags & __FMODE_EXEC)
+ return 0;
+ return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path,
+ f->f_flags);
+}
+
+/**
+ * tomoyo_file_ioctl - Target for security_file_ioctl().
+ *
+ * @file: Pointer to "struct file".
+ * @cmd: Command for ioctl().
+ * @arg: Argument for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd);
+}
+
+/**
+ * tomoyo_path_chmod - Target for security_path_chmod().
+ *
+ * @path: Pointer to "struct path".
+ * @mode: DAC permission mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chmod(const struct path *path, umode_t mode)
+{
+ return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path,
+ mode & S_IALLUGO);
+}
+
+/**
+ * tomoyo_path_chown - Target for security_path_chown().
+ *
+ * @path: Pointer to "struct path".
+ * @uid: Owner ID.
+ * @gid: Group ID.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+{
+ int error = 0;
+
+ if (uid_valid(uid))
+ error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path,
+ from_kuid(&init_user_ns, uid));
+ if (!error && gid_valid(gid))
+ error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path,
+ from_kgid(&init_user_ns, gid));
+ return error;
+}
+
+/**
+ * tomoyo_path_chroot - Target for security_path_chroot().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chroot(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL);
+}
+
+/**
+ * tomoyo_sb_mount - Target for security_sb_mount().
+ *
+ * @dev_name: Name of device file. Maybe NULL.
+ * @path: Pointer to "struct path".
+ * @type: Name of filesystem type. Maybe NULL.
+ * @flags: Mount options.
+ * @data: Optional data. Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_mount(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags, void *data)
+{
+ return tomoyo_mount_permission(dev_name, path, type, flags, data);
+}
+
+/**
+ * tomoyo_sb_umount - Target for security_sb_umount().
+ *
+ * @mnt: Pointer to "struct vfsmount".
+ * @flags: Unmount options.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
+{
+ struct path path = { .mnt = mnt, .dentry = mnt->mnt_root };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL);
+}
+
+/**
+ * tomoyo_sb_pivotroot - Target for security_sb_pivotroot().
+ *
+ * @old_path: Pointer to "struct path".
+ * @new_path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path)
+{
+ return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path);
+}
+
+/**
+ * tomoyo_socket_listen - Check permission for listen().
+ *
+ * @sock: Pointer to "struct socket".
+ * @backlog: Backlog parameter.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_listen(struct socket *sock, int backlog)
+{
+ return tomoyo_socket_listen_permission(sock);
+}
+
+/**
+ * tomoyo_socket_connect - Check permission for connect().
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ return tomoyo_socket_connect_permission(sock, addr, addr_len);
+}
+
+/**
+ * tomoyo_socket_bind - Check permission for bind().
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ return tomoyo_socket_bind_permission(sock, addr, addr_len);
+}
+
+/**
+ * tomoyo_socket_sendmsg - Check permission for sendmsg().
+ *
+ * @sock: Pointer to "struct socket".
+ * @msg: Pointer to "struct msghdr".
+ * @size: Size of message.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg,
+ int size)
+{
+ return tomoyo_socket_sendmsg_permission(sock, msg, size);
+}
+
+struct lsm_blob_sizes tomoyo_blob_sizes __ro_after_init = {
+ .lbs_task = sizeof(struct tomoyo_task),
+};
+
+/**
+ * tomoyo_task_alloc - Target for security_task_alloc().
+ *
+ * @task: Pointer to "struct task_struct".
+ * @clone_flags: clone() flags.
+ *
+ * Returns 0.
+ */
+static int tomoyo_task_alloc(struct task_struct *task,
+ unsigned long clone_flags)
+{
+ struct tomoyo_task *old = tomoyo_task(current);
+ struct tomoyo_task *new = tomoyo_task(task);
+
+ new->domain_info = old->domain_info;
+ atomic_inc(&new->domain_info->users);
+ new->old_domain_info = NULL;
+ return 0;
+}
+
+/**
+ * tomoyo_task_free - Target for security_task_free().
+ *
+ * @task: Pointer to "struct task_struct".
+ */
+static void tomoyo_task_free(struct task_struct *task)
+{
+ struct tomoyo_task *s = tomoyo_task(task);
+
+ if (s->domain_info) {
+ atomic_dec(&s->domain_info->users);
+ s->domain_info = NULL;
+ }
+ if (s->old_domain_info) {
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+ }
+}
+
+static const struct lsm_id tomoyo_lsmid = {
+ .name = "tomoyo",
+ .id = LSM_ID_TOMOYO,
+};
+
+/*
+ * tomoyo_security_ops is a "struct security_operations" which is used for
+ * registering TOMOYO.
+ */
+static struct security_hook_list tomoyo_hooks[] __ro_after_init = {
+ LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare),
+ LSM_HOOK_INIT(bprm_committed_creds, tomoyo_bprm_committed_creds),
+ LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc),
+ LSM_HOOK_INIT(task_free, tomoyo_task_free),
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ LSM_HOOK_INIT(bprm_creds_for_exec, tomoyo_bprm_creds_for_exec),
+#endif
+ LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security),
+ LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl),
+ LSM_HOOK_INIT(file_open, tomoyo_file_open),
+ LSM_HOOK_INIT(file_truncate, tomoyo_file_truncate),
+ LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate),
+ LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink),
+ LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir),
+ LSM_HOOK_INIT(path_rmdir, tomoyo_path_rmdir),
+ LSM_HOOK_INIT(path_symlink, tomoyo_path_symlink),
+ LSM_HOOK_INIT(path_mknod, tomoyo_path_mknod),
+ LSM_HOOK_INIT(path_link, tomoyo_path_link),
+ LSM_HOOK_INIT(path_rename, tomoyo_path_rename),
+ LSM_HOOK_INIT(inode_getattr, tomoyo_inode_getattr),
+ LSM_HOOK_INIT(file_ioctl, tomoyo_file_ioctl),
+ LSM_HOOK_INIT(file_ioctl_compat, tomoyo_file_ioctl),
+ LSM_HOOK_INIT(path_chmod, tomoyo_path_chmod),
+ LSM_HOOK_INIT(path_chown, tomoyo_path_chown),
+ LSM_HOOK_INIT(path_chroot, tomoyo_path_chroot),
+ LSM_HOOK_INIT(sb_mount, tomoyo_sb_mount),
+ LSM_HOOK_INIT(sb_umount, tomoyo_sb_umount),
+ LSM_HOOK_INIT(sb_pivotroot, tomoyo_sb_pivotroot),
+ LSM_HOOK_INIT(socket_bind, tomoyo_socket_bind),
+ LSM_HOOK_INIT(socket_connect, tomoyo_socket_connect),
+ LSM_HOOK_INIT(socket_listen, tomoyo_socket_listen),
+ LSM_HOOK_INIT(socket_sendmsg, tomoyo_socket_sendmsg),
+};
+
+/* Lock for GC. */
+DEFINE_SRCU(tomoyo_ss);
+
+int tomoyo_enabled __ro_after_init = 1;
+
+/**
+ * tomoyo_init - Register TOMOYO Linux as a LSM module.
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_init(void)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ /* register ourselves with the security framework */
+ security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks),
+ &tomoyo_lsmid);
+ pr_info("TOMOYO Linux initialized\n");
+ s->domain_info = &tomoyo_kernel_domain;
+ atomic_inc(&tomoyo_kernel_domain.users);
+ s->old_domain_info = NULL;
+ tomoyo_mm_init();
+
+ return 0;
+}
+
+DEFINE_LSM(tomoyo) = {
+ .name = "tomoyo",
+ .enabled = &tomoyo_enabled,
+ .flags = LSM_FLAG_LEGACY_MAJOR,
+ .blobs = &tomoyo_blob_sizes,
+ .init = tomoyo_init,
+};
/* Lock for protecting policy. */
DEFINE_MUTEX(tomoyo_policy_lock);
+/* Has /sbin/init started? */
+bool tomoyo_policy_loaded;
+
/*
* Mapping table from "enum tomoyo_mac_index" to
* "enum tomoyo_mac_category_index".
projects / linux-block.git / commitdiff