# SPDX-License-Identifier: GPL-2.0
-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
+obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o init.o load_policy.o memory.o mount.o network.o realpath.o securityfs_if.o util.o
targets += builtin-policy.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"
+
+#include "hooks.h"
+
+#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;
+
+/**
+ * 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,
+};
}
/**
- * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
+ * tomoyo_interface_init - Initialize /sys/kernel/security/tomoyo/ interface.
*
* Returns 0.
*/
-static int __init tomoyo_initerface_init(void)
+static int __init tomoyo_interface_init(void)
{
struct tomoyo_domain_info *domain;
struct dentry *tomoyo_dir;
return 0;
}
-fs_initcall(tomoyo_initerface_init);
+fs_initcall(tomoyo_interface_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