1165 lines
32 KiB
C
1165 lines
32 KiB
C
#include <linux/anon_inodes.h>
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#include <linux/capability.h>
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#include <linux/cred.h>
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#include <linux/err.h>
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#include <linux/fdtable.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/kprobes.h>
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#include <linux/syscalls.h>
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#include <linux/task_work.h>
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#include <linux/uaccess.h>
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#include <linux/version.h>
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#include "supercalls.h"
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#include "arch.h"
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#include "allowlist.h"
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#include "feature.h"
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#include "klog.h" // IWYU pragma: keep
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#include "ksud.h"
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#include "kernel_compat.h"
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#include "manager.h"
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#include "sulog.h"
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#include "selinux/selinux.h"
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#include "objsec.h"
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#include "file_wrapper.h"
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#ifndef CONFIG_KSU_SUSFS
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#include "syscall_hook_manager.h"
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#endif
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#include "throne_comm.h"
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#include "dynamic_manager.h"
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#ifdef CONFIG_KSU_MANUAL_SU
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#include "manual_su.h"
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#endif
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#ifdef CONFIG_KSU_SUSFS
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#include <linux/namei.h>
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#include <linux/susfs.h>
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bool susfs_is_boot_completed_triggered = false;
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extern bool susfs_is_umount_for_zygote_system_process_enabled;
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_BIND_MOUNT
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extern bool susfs_is_auto_add_sus_bind_mount_enabled;
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_BIND_MOUNT
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT
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extern bool susfs_is_auto_add_sus_ksu_default_mount_enabled;
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
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extern bool susfs_is_auto_add_try_umount_for_bind_mount_enabled;
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
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static void susfs_on_post_fs_data(void) {
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struct path path;
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#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
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if (!kern_path(DATA_ADB_UMOUNT_FOR_ZYGOTE_SYSTEM_PROCESS, 0, &path)) {
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susfs_is_umount_for_zygote_system_process_enabled = true;
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path_put(&path);
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}
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pr_info("susfs_is_umount_for_zygote_system_process_enabled: %d\n", susfs_is_umount_for_zygote_system_process_enabled);
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#endif // #ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_BIND_MOUNT
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if (!kern_path(DATA_ADB_NO_AUTO_ADD_SUS_BIND_MOUNT, 0, &path)) {
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susfs_is_auto_add_sus_bind_mount_enabled = false;
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path_put(&path);
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}
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pr_info("susfs_is_auto_add_sus_bind_mount_enabled: %d\n", susfs_is_auto_add_sus_bind_mount_enabled);
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_BIND_MOUNT
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT
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if (!kern_path(DATA_ADB_NO_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT, 0, &path)) {
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susfs_is_auto_add_sus_ksu_default_mount_enabled = false;
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path_put(&path);
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}
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pr_info("susfs_is_auto_add_sus_ksu_default_mount_enabled: %d\n", susfs_is_auto_add_sus_ksu_default_mount_enabled);
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_SUS_KSU_DEFAULT_MOUNT
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#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
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if (!kern_path(DATA_ADB_NO_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT, 0, &path)) {
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susfs_is_auto_add_try_umount_for_bind_mount_enabled = false;
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path_put(&path);
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}
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pr_info("susfs_is_auto_add_try_umount_for_bind_mount_enabled: %d\n", susfs_is_auto_add_try_umount_for_bind_mount_enabled);
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#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
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}
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#endif // #ifdef CONFIG_KSU_SUSFS
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bool ksu_uid_scanner_enabled = false;
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// Permission check functions
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bool only_manager(void)
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{
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return is_manager();
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}
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bool only_root(void)
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{
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return current_uid().val == 0;
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}
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bool manager_or_root(void)
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{
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return current_uid().val == 0 || is_manager();
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}
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bool always_allow(void)
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{
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return true; // No permission check
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}
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bool allowed_for_su(void)
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{
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bool is_allowed = is_manager() || ksu_is_allow_uid_for_current(current_uid().val);
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#if __SULOG_GATE
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ksu_sulog_report_permission_check(current_uid().val, current->comm, is_allowed);
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#endif
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return is_allowed;
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}
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static void init_uid_scanner(void)
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{
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ksu_uid_init();
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do_load_throne_state(NULL);
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if (ksu_uid_scanner_enabled) {
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int ret = ksu_throne_comm_init();
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if (ret != 0) {
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pr_err("Failed to initialize throne communication: %d\n", ret);
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}
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}
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}
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static int do_grant_root(void __user *arg)
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{
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// we already check uid above on allowed_for_su()
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pr_info("allow root for: %d\n", current_uid().val);
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escape_with_root_profile();
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return 0;
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}
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static int do_get_info(void __user *arg)
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{
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struct ksu_get_info_cmd cmd = {.version = KERNEL_SU_VERSION, .flags = 0};
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#ifdef MODULE
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cmd.flags |= 0x1;
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#endif
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if (is_manager()) {
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cmd.flags |= 0x2;
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}
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cmd.features = KSU_FEATURE_MAX;
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_version: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_report_event(void __user *arg)
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{
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struct ksu_report_event_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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switch (cmd.event) {
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case EVENT_POST_FS_DATA: {
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static bool post_fs_data_lock = false;
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if (!post_fs_data_lock) {
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post_fs_data_lock = true;
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pr_info("post-fs-data triggered\n");
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#ifdef CONFIG_KSU_SUSFS
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susfs_on_post_fs_data();
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pr_info("susfs_on_post_fs_data triggered\n");
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#endif
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on_post_fs_data();
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init_uid_scanner();
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#if __SULOG_GATE
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ksu_sulog_init();
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#endif
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ksu_dynamic_manager_init();
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}
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break;
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}
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case EVENT_BOOT_COMPLETED: {
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static bool boot_complete_lock = false;
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if (!boot_complete_lock) {
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boot_complete_lock = true;
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pr_info("boot_complete triggered\n");
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on_boot_completed();
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#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
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susfs_is_boot_completed_triggered = true;
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#endif
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}
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break;
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}
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case EVENT_MODULE_MOUNTED: {
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pr_info("module mounted!\n");
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on_module_mounted();
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break;
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}
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default:
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break;
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}
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return 0;
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}
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static int do_set_sepolicy(void __user *arg)
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{
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struct ksu_set_sepolicy_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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return handle_sepolicy(cmd.cmd, (void __user *)cmd.arg);
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}
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static int do_check_safemode(void __user *arg)
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{
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struct ksu_check_safemode_cmd cmd;
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cmd.in_safe_mode = ksu_is_safe_mode();
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if (cmd.in_safe_mode) {
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pr_warn("safemode enabled!\n");
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}
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("check_safemode: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_get_allow_list(void __user *arg)
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{
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struct ksu_get_allow_list_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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bool success = ksu_get_allow_list((int *)cmd.uids, (int *)&cmd.count, true);
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if (!success) {
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return -EFAULT;
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}
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_allow_list: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_get_deny_list(void __user *arg)
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{
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struct ksu_get_allow_list_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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bool success = ksu_get_allow_list((int *)cmd.uids, (int *)&cmd.count, false);
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if (!success) {
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return -EFAULT;
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}
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_deny_list: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_uid_granted_root(void __user *arg)
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{
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struct ksu_uid_granted_root_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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cmd.granted = ksu_is_allow_uid_for_current(cmd.uid);
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("uid_granted_root: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_uid_should_umount(void __user *arg)
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{
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struct ksu_uid_should_umount_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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return -EFAULT;
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}
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cmd.should_umount = ksu_uid_should_umount(cmd.uid);
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("uid_should_umount: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_get_manager_uid(void __user *arg)
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{
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struct ksu_get_manager_uid_cmd cmd;
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cmd.uid = ksu_get_manager_uid();
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_manager_uid: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_get_app_profile(void __user *arg)
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{
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struct ksu_get_app_profile_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("get_app_profile: copy_from_user failed\n");
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return -EFAULT;
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}
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if (!ksu_get_app_profile(&cmd.profile)) {
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return -ENOENT;
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}
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_app_profile: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_set_app_profile(void __user *arg)
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{
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struct ksu_set_app_profile_cmd cmd;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("set_app_profile: copy_from_user failed\n");
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return -EFAULT;
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}
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if (!ksu_set_app_profile(&cmd.profile, true)) {
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#if __SULOG_GATE
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ksu_sulog_report_manager_operation("SET_APP_PROFILE",
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current_uid().val, cmd.profile.current_uid);
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#endif
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return -EFAULT;
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}
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return 0;
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}
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static int do_get_feature(void __user *arg)
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{
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struct ksu_get_feature_cmd cmd;
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bool supported;
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int ret;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("get_feature: copy_from_user failed\n");
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return -EFAULT;
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}
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ret = ksu_get_feature(cmd.feature_id, &cmd.value, &supported);
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cmd.supported = supported ? 1 : 0;
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if (ret && supported) {
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pr_err("get_feature: failed for feature %u: %d\n", cmd.feature_id, ret);
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return ret;
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}
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if (copy_to_user(arg, &cmd, sizeof(cmd))) {
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pr_err("get_feature: copy_to_user failed\n");
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return -EFAULT;
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}
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return 0;
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}
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static int do_set_feature(void __user *arg)
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{
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struct ksu_set_feature_cmd cmd;
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int ret;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("set_feature: copy_from_user failed\n");
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return -EFAULT;
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}
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ret = ksu_set_feature(cmd.feature_id, cmd.value);
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if (ret) {
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pr_err("set_feature: failed for feature %u: %d\n", cmd.feature_id, ret);
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return ret;
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}
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return 0;
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}
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static int do_get_wrapper_fd(void __user *arg) {
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if (!ksu_file_sid) {
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return -EINVAL;
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}
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struct ksu_get_wrapper_fd_cmd cmd;
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int ret;
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("get_wrapper_fd: copy_from_user failed\n");
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return -EFAULT;
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}
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struct file* f = fget(cmd.fd);
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if (!f) {
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return -EBADF;
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}
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struct ksu_file_wrapper *data = ksu_create_file_wrapper(f);
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if (data == NULL) {
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ret = -ENOMEM;
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goto put_orig_file;
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}
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|
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
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#define getfd_secure anon_inode_create_getfd
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#elif LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
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#define getfd_secure anon_inode_getfd_secure
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#else
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#define getfd_secure anon_inode_getfd
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
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ret = getfd_secure("[ksu_fdwrapper]", &data->ops, data, f->f_flags, NULL);
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#else
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ret = getfd_secure("[ksu_fdwrapper]", &data->ops, data, f->f_flags);
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#endif
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if (ret < 0) {
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pr_err("ksu_fdwrapper: getfd failed: %d\n", ret);
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goto put_wrapper_data;
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}
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struct file* pf = fget(ret);
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struct inode* wrapper_inode = file_inode(pf);
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// copy original inode mode
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wrapper_inode->i_mode = file_inode(f)->i_mode;
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struct inode_security_struct *sec = selinux_inode(wrapper_inode);
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if (sec) {
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sec->sid = ksu_file_sid;
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}
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fput(pf);
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goto put_orig_file;
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put_wrapper_data:
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ksu_delete_file_wrapper(data);
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put_orig_file:
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fput(f);
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return ret;
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}
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static int do_manage_mark(void __user *arg)
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{
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struct ksu_manage_mark_cmd cmd;
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#ifndef CONFIG_KSU_SUSFS
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int ret = 0;
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#endif
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if (copy_from_user(&cmd, arg, sizeof(cmd))) {
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pr_err("manage_mark: copy_from_user failed\n");
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return -EFAULT;
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}
|
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|
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switch (cmd.operation) {
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case KSU_MARK_GET: {
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#ifndef CONFIG_KSU_SUSFS
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// Get task mark status
|
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ret = ksu_get_task_mark(cmd.pid);
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if (ret < 0) {
|
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pr_err("manage_mark: get failed for pid %d: %d\n", cmd.pid, ret);
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return ret;
|
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}
|
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cmd.result = (u32)ret;
|
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break;
|
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#else
|
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return -EINVAL;
|
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#endif
|
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}
|
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case KSU_MARK_MARK: {
|
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#ifndef CONFIG_KSU_SUSFS
|
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if (cmd.pid == 0) {
|
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ksu_mark_all_process();
|
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} else {
|
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ret = ksu_set_task_mark(cmd.pid, true);
|
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if (ret < 0) {
|
|
pr_err("manage_mark: set_mark failed for pid %d: %d\n", cmd.pid,
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
#else
|
|
pr_info("susfs: cmd: KSU_MARK_MARK => do nothing\n");
|
|
#endif
|
|
break;
|
|
}
|
|
case KSU_MARK_UNMARK: {
|
|
#ifndef CONFIG_KSU_SUSFS
|
|
if (cmd.pid == 0) {
|
|
ksu_unmark_all_process();
|
|
} else {
|
|
ret = ksu_set_task_mark(cmd.pid, false);
|
|
if (ret < 0) {
|
|
pr_err("manage_mark: set_unmark failed for pid %d: %d\n",
|
|
cmd.pid, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
#else
|
|
pr_info("susfs: cmd: KSU_MARK_UNMARK => do nothing\n");
|
|
#endif
|
|
break;
|
|
}
|
|
case KSU_MARK_REFRESH: {
|
|
#ifndef CONFIG_KSU_SUSFS
|
|
ksu_mark_running_process();
|
|
pr_info("manage_mark: refreshed running processes\n");
|
|
#else
|
|
pr_info("susfs: cmd: KSU_MARK_REFRESH: do nothing\n");
|
|
#endif
|
|
break;
|
|
}
|
|
default: {
|
|
pr_err("manage_mark: invalid operation %u\n", cmd.operation);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("manage_mark: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_nuke_ext4_sysfs(void __user *arg)
|
|
{
|
|
struct ksu_nuke_ext4_sysfs_cmd cmd;
|
|
char mnt[256];
|
|
long ret;
|
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
if (!cmd.arg)
|
|
return -EINVAL;
|
|
|
|
memset(mnt, 0, sizeof(mnt));
|
|
|
|
ret = strncpy_from_user(mnt, cmd.arg, sizeof(mnt));
|
|
if (ret < 0) {
|
|
pr_err("nuke ext4 copy mnt failed: %ld\\n", ret);
|
|
return -EFAULT; // 或者 return ret;
|
|
}
|
|
|
|
if (ret == sizeof(mnt)) {
|
|
pr_err("nuke ext4 mnt path too long\\n");
|
|
return -ENAMETOOLONG;
|
|
}
|
|
|
|
pr_info("do_nuke_ext4_sysfs: %s\n", mnt);
|
|
|
|
return nuke_ext4_sysfs(mnt);
|
|
}
|
|
|
|
// 100. GET_FULL_VERSION - Get full version string
|
|
static int do_get_full_version(void __user *arg)
|
|
{
|
|
struct ksu_get_full_version_cmd cmd = {0};
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0)
|
|
strscpy(cmd.version_full, KSU_VERSION_FULL, sizeof(cmd.version_full));
|
|
#else
|
|
strlcpy(cmd.version_full, KSU_VERSION_FULL, sizeof(cmd.version_full));
|
|
#endif
|
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("get_full_version: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// 101. HOOK_TYPE - Get hook type
|
|
static int do_get_hook_type(void __user *arg)
|
|
{
|
|
struct ksu_hook_type_cmd cmd = {0};
|
|
const char *type = "Tracepoint";
|
|
|
|
#if defined(KSU_MANUAL_HOOK)
|
|
type = "Manual";
|
|
#elif defined(CONFIG_KSU_SUSFS)
|
|
type = "Inline";
|
|
#endif
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0)
|
|
strscpy(cmd.hook_type, type, sizeof(cmd.hook_type));
|
|
#else
|
|
strlcpy(cmd.hook_type, type, sizeof(cmd.hook_type));
|
|
#endif
|
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("get_hook_type: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// 102. ENABLE_KPM - Check if KPM is enabled
|
|
static int do_enable_kpm(void __user *arg)
|
|
{
|
|
struct ksu_enable_kpm_cmd cmd;
|
|
|
|
cmd.enabled = IS_ENABLED(CONFIG_KPM);
|
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("enable_kpm: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_dynamic_manager(void __user *arg)
|
|
{
|
|
struct ksu_dynamic_manager_cmd cmd;
|
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
|
|
pr_err("dynamic_manager: copy_from_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
int ret = ksu_handle_dynamic_manager(&cmd.config);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (cmd.config.operation == DYNAMIC_MANAGER_OP_GET &&
|
|
copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("dynamic_manager: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_get_managers(void __user *arg)
|
|
{
|
|
struct ksu_get_managers_cmd cmd;
|
|
|
|
int ret = ksu_get_active_managers(&cmd.manager_info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("get_managers: copy_from_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_enable_uid_scanner(void __user *arg)
|
|
{
|
|
struct ksu_enable_uid_scanner_cmd cmd;
|
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
|
|
pr_err("enable_uid_scanner: copy_from_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
switch (cmd.operation) {
|
|
case UID_SCANNER_OP_GET_STATUS: {
|
|
bool status = ksu_uid_scanner_enabled;
|
|
if (copy_to_user((void __user *)cmd.status_ptr, &status, sizeof(status))) {
|
|
pr_err("enable_uid_scanner: copy status failed\n");
|
|
return -EFAULT;
|
|
}
|
|
break;
|
|
}
|
|
case UID_SCANNER_OP_TOGGLE: {
|
|
bool enabled = cmd.enabled;
|
|
|
|
if (enabled == ksu_uid_scanner_enabled) {
|
|
pr_info("enable_uid_scanner: no need to change, already %s\n",
|
|
enabled ? "enabled" : "disabled");
|
|
break;
|
|
}
|
|
|
|
if (enabled) {
|
|
// Enable UID scanner
|
|
int ret = ksu_throne_comm_init();
|
|
if (ret != 0) {
|
|
pr_err("enable_uid_scanner: failed to initialize: %d\n", ret);
|
|
return -EFAULT;
|
|
}
|
|
pr_info("enable_uid_scanner: enabled\n");
|
|
} else {
|
|
// Disable UID scanner
|
|
ksu_throne_comm_exit();
|
|
pr_info("enable_uid_scanner: disabled\n");
|
|
}
|
|
|
|
ksu_uid_scanner_enabled = enabled;
|
|
ksu_throne_comm_save_state();
|
|
break;
|
|
}
|
|
case UID_SCANNER_OP_CLEAR_ENV: {
|
|
// Clear environment (force exit)
|
|
ksu_throne_comm_exit();
|
|
ksu_uid_scanner_enabled = false;
|
|
ksu_throne_comm_save_state();
|
|
pr_info("enable_uid_scanner: environment cleared\n");
|
|
break;
|
|
}
|
|
default:
|
|
pr_err("enable_uid_scanner: invalid operation\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_KSU_MANUAL_SU
|
|
static bool system_uid_check(void)
|
|
{
|
|
return current_uid().val <= 2000;
|
|
}
|
|
|
|
static int do_manual_su(void __user *arg)
|
|
{
|
|
struct ksu_manual_su_cmd cmd;
|
|
struct manual_su_request request;
|
|
int res;
|
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
|
|
pr_err("manual_su: copy_from_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
pr_info("manual_su request, option=%d, uid=%d, pid=%d\n",
|
|
cmd.option, cmd.target_uid, cmd.target_pid);
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
request.target_uid = cmd.target_uid;
|
|
request.target_pid = cmd.target_pid;
|
|
|
|
if (cmd.option == MANUAL_SU_OP_GENERATE_TOKEN ||
|
|
cmd.option == MANUAL_SU_OP_ESCALATE) {
|
|
memcpy(request.token_buffer, cmd.token_buffer, sizeof(request.token_buffer));
|
|
}
|
|
|
|
res = ksu_handle_manual_su_request(cmd.option, &request);
|
|
|
|
if (cmd.option == MANUAL_SU_OP_GENERATE_TOKEN && res == 0) {
|
|
memcpy(cmd.token_buffer, request.token_buffer, sizeof(cmd.token_buffer));
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
|
pr_err("manual_su: copy_to_user failed\n");
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
// IOCTL handlers mapping table
|
|
static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
|
|
{ .cmd = KSU_IOCTL_GRANT_ROOT, .name = "GRANT_ROOT", .handler = do_grant_root, .perm_check = allowed_for_su },
|
|
{ .cmd = KSU_IOCTL_GET_INFO, .name = "GET_INFO", .handler = do_get_info, .perm_check = always_allow },
|
|
{ .cmd = KSU_IOCTL_REPORT_EVENT, .name = "REPORT_EVENT", .handler = do_report_event, .perm_check = only_root },
|
|
{ .cmd = KSU_IOCTL_SET_SEPOLICY, .name = "SET_SEPOLICY", .handler = do_set_sepolicy, .perm_check = only_root },
|
|
{ .cmd = KSU_IOCTL_CHECK_SAFEMODE, .name = "CHECK_SAFEMODE", .handler = do_check_safemode, .perm_check = always_allow },
|
|
{ .cmd = KSU_IOCTL_GET_ALLOW_LIST, .name = "GET_ALLOW_LIST", .handler = do_get_allow_list, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_GET_DENY_LIST, .name = "GET_DENY_LIST", .handler = do_get_deny_list, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_UID_GRANTED_ROOT, .name = "UID_GRANTED_ROOT", .handler = do_uid_granted_root, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_UID_SHOULD_UMOUNT, .name = "UID_SHOULD_UMOUNT", .handler = do_uid_should_umount, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_GET_MANAGER_UID, .name = "GET_MANAGER_UID", .handler = do_get_manager_uid, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_GET_APP_PROFILE, .name = "GET_APP_PROFILE", .handler = do_get_app_profile, .perm_check = only_manager },
|
|
{ .cmd = KSU_IOCTL_SET_APP_PROFILE, .name = "SET_APP_PROFILE", .handler = do_set_app_profile, .perm_check = only_manager },
|
|
{ .cmd = KSU_IOCTL_GET_FEATURE, .name = "GET_FEATURE", .handler = do_get_feature, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_SET_FEATURE, .name = "SET_FEATURE", .handler = do_set_feature, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_GET_WRAPPER_FD, .name = "GET_WRAPPER_FD", .handler = do_get_wrapper_fd, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_MANAGE_MARK, .name = "MANAGE_MARK", .handler = do_manage_mark, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_NUKE_EXT4_SYSFS, .name = "NUKE_EXT4_SYSFS", .handler = do_nuke_ext4_sysfs, .perm_check = manager_or_root },
|
|
{ .cmd = KSU_IOCTL_GET_FULL_VERSION,.name = "GET_FULL_VERSION", .handler = do_get_full_version, .perm_check = always_allow},
|
|
{ .cmd = KSU_IOCTL_HOOK_TYPE,.name = "GET_HOOK_TYPE", .handler = do_get_hook_type, .perm_check = manager_or_root},
|
|
{ .cmd = KSU_IOCTL_ENABLE_KPM, .name = "GET_ENABLE_KPM", .handler = do_enable_kpm, .perm_check = manager_or_root},
|
|
{ .cmd = KSU_IOCTL_DYNAMIC_MANAGER, .name = "SET_DYNAMIC_MANAGER", .handler = do_dynamic_manager, .perm_check = manager_or_root},
|
|
{ .cmd = KSU_IOCTL_GET_MANAGERS, .name = "GET_MANAGERS", .handler = do_get_managers, .perm_check = manager_or_root},
|
|
{ .cmd = KSU_IOCTL_ENABLE_UID_SCANNER, .name = "SET_ENABLE_UID_SCANNER", .handler = do_enable_uid_scanner, .perm_check = manager_or_root},
|
|
#ifdef CONFIG_KSU_MANUAL_SU
|
|
{ .cmd = KSU_IOCTL_MANUAL_SU, .name = "MANUAL_SU", .handler = do_manual_su, .perm_check = system_uid_check},
|
|
#endif
|
|
#ifdef CONFIG_KPM
|
|
{ .cmd = KSU_IOCTL_KPM, .name = "KPM_OPERATION", .handler = do_kpm, .perm_check = manager_or_root},
|
|
#endif
|
|
{ .cmd = 0, .name = NULL, .handler = NULL, .perm_check = NULL} // Sentine
|
|
};
|
|
|
|
#ifndef CONFIG_KSU_SUSFS
|
|
struct ksu_install_fd_tw {
|
|
struct callback_head cb;
|
|
int __user *outp;
|
|
};
|
|
|
|
static void ksu_install_fd_tw_func(struct callback_head *cb)
|
|
{
|
|
struct ksu_install_fd_tw *tw = container_of(cb, struct ksu_install_fd_tw, cb);
|
|
int fd = ksu_install_fd();
|
|
pr_info("[%d] install ksu fd: %d\n", current->pid, fd);
|
|
|
|
if (copy_to_user(tw->outp, &fd, sizeof(fd))) {
|
|
pr_err("install ksu fd reply err\n");
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
|
|
close_fd(fd);
|
|
#else
|
|
__close_fd(current->files, fd);
|
|
#endif
|
|
}
|
|
|
|
kfree(tw);
|
|
}
|
|
|
|
// downstream: make sure to pass arg as reference, this can allow us to extend things.
|
|
int ksu_handle_sys_reboot(int magic1, int magic2, unsigned int cmd, void __user **arg)
|
|
{
|
|
struct ksu_install_fd_tw *tw;
|
|
|
|
if (magic1 != KSU_INSTALL_MAGIC1)
|
|
return 0;
|
|
|
|
#ifdef CONFIG_KSU_DEBUG
|
|
pr_info("sys_reboot: intercepted call! magic: 0x%x id: %d\n", magic1, magic2);
|
|
#endif
|
|
|
|
// Check if this is a request to install KSU fd
|
|
if (magic2 == KSU_INSTALL_MAGIC2) {
|
|
tw = kzalloc(sizeof(*tw), GFP_ATOMIC);
|
|
if (!tw)
|
|
return 0;
|
|
|
|
tw->outp = (int __user *)*arg;
|
|
tw->cb.func = ksu_install_fd_tw_func;
|
|
|
|
if (task_work_add(current, &tw->cb, TWA_RESUME)) {
|
|
kfree(tw);
|
|
pr_warn("install fd add task_work failed\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// extensions
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef KSU_KPROBES_HOOK
|
|
// Reboot hook for installing fd
|
|
static int reboot_handler_pre(struct kprobe *p, struct pt_regs *regs)
|
|
{
|
|
struct pt_regs *real_regs = PT_REAL_REGS(regs);
|
|
int magic1 = (int)PT_REGS_PARM1(real_regs);
|
|
int magic2 = (int)PT_REGS_PARM2(real_regs);
|
|
int cmd = (int)PT_REGS_PARM3(real_regs);
|
|
void __user **arg = (void __user **)&PT_REGS_SYSCALL_PARM4(real_regs);
|
|
|
|
return ksu_handle_sys_reboot(magic1, magic2, cmd, arg);
|
|
}
|
|
|
|
static struct kprobe reboot_kp = {
|
|
.symbol_name = REBOOT_SYMBOL,
|
|
.pre_handler = reboot_handler_pre,
|
|
};
|
|
#endif
|
|
#else
|
|
int ksu_handle_sys_reboot(int magic1, int magic2, unsigned int cmd, void __user **arg)
|
|
{
|
|
if (magic1 != KSU_INSTALL_MAGIC1) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
// If magic2 is susfs and current process is root
|
|
if (magic2 == SUSFS_MAGIC && current_uid().val == 0) {
|
|
#ifdef CONFIG_KSU_SUSFS_SUS_PATH
|
|
if (cmd == CMD_SUSFS_ADD_SUS_PATH) {
|
|
susfs_add_sus_path(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_ADD_SUS_PATH_LOOP) {
|
|
susfs_add_sus_path_loop(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SET_ANDROID_DATA_ROOT_PATH) {
|
|
susfs_set_i_state_on_external_dir(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SET_SDCARD_ROOT_PATH) {
|
|
susfs_set_i_state_on_external_dir(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SUS_PATH
|
|
#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
|
|
if (cmd == CMD_SUSFS_ADD_SUS_MOUNT) {
|
|
susfs_add_sus_mount(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_HIDE_SUS_MNTS_FOR_ALL_PROCS) {
|
|
susfs_set_hide_sus_mnts_for_all_procs(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_UMOUNT_FOR_ZYGOTE_ISO_SERVICE) {
|
|
susfs_set_umount_for_zygote_iso_service(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
|
|
#ifdef CONFIG_KSU_SUSFS_SUS_KSTAT
|
|
if (cmd == CMD_SUSFS_ADD_SUS_KSTAT) {
|
|
susfs_add_sus_kstat(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_UPDATE_SUS_KSTAT) {
|
|
susfs_update_sus_kstat(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_ADD_SUS_KSTAT_STATICALLY) {
|
|
susfs_add_sus_kstat(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SUS_KSTAT
|
|
#ifdef CONFIG_KSU_SUSFS_TRY_UMOUNT
|
|
if (cmd == CMD_SUSFS_ADD_TRY_UMOUNT) {
|
|
susfs_add_try_umount(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_TRY_UMOUNT
|
|
#ifdef CONFIG_KSU_SUSFS_SPOOF_UNAME
|
|
if (cmd == CMD_SUSFS_SET_UNAME) {
|
|
susfs_set_uname(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SPOOF_UNAME
|
|
#ifdef CONFIG_KSU_SUSFS_ENABLE_LOG
|
|
if (cmd == CMD_SUSFS_ENABLE_LOG) {
|
|
susfs_enable_log(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_ENABLE_LOG
|
|
#ifdef CONFIG_KSU_SUSFS_SPOOF_CMDLINE_OR_BOOTCONFIG
|
|
if (cmd == CMD_SUSFS_SET_CMDLINE_OR_BOOTCONFIG) {
|
|
susfs_set_cmdline_or_bootconfig(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SPOOF_CMDLINE_OR_BOOTCONFIG
|
|
#ifdef CONFIG_KSU_SUSFS_OPEN_REDIRECT
|
|
if (cmd == CMD_SUSFS_ADD_OPEN_REDIRECT) {
|
|
susfs_add_open_redirect(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_OPEN_REDIRECT
|
|
#ifdef CONFIG_KSU_SUSFS_SUS_SU
|
|
if (cmd == CMD_SUSFS_SHOW_SUS_SU_WORKING_MODE) {
|
|
susfs_get_sus_su_working_mode(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_IS_SUS_SU_READY) {
|
|
susfs_is_sus_su_ready(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SUS_SU) {
|
|
susfs_sus_su(arg);
|
|
return 0;
|
|
}
|
|
#endif //#ifdef CONFIG_KSU_SUSFS_SUS_SU
|
|
#ifdef CONFIG_KSU_SUSFS_SUS_MAP
|
|
if (cmd == CMD_SUSFS_ADD_SUS_MAP) {
|
|
susfs_add_sus_map(arg);
|
|
return 0;
|
|
}
|
|
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_MAP
|
|
if (cmd == CMD_SUSFS_ENABLE_AVC_LOG_SPOOFING) {
|
|
susfs_set_avc_log_spoofing(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SHOW_ENABLED_FEATURES) {
|
|
susfs_get_enabled_features(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SHOW_VARIANT) {
|
|
susfs_show_variant(arg);
|
|
return 0;
|
|
}
|
|
if (cmd == CMD_SUSFS_SHOW_VERSION) {
|
|
susfs_show_version(arg);
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Check if this is a request to install KSU fd
|
|
if (magic2 == KSU_INSTALL_MAGIC2) {
|
|
int fd = ksu_install_fd();
|
|
pr_info("[%d] install ksu fd: %d\n", current->pid, fd);
|
|
if (copy_to_user((int *)*arg, &fd, sizeof(fd))) {
|
|
pr_err("install ksu fd reply err\n");
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#endif // #ifndef CONFIG_KSU_SUSFS
|
|
|
|
void ksu_supercalls_init(void)
|
|
{
|
|
int i;
|
|
|
|
pr_info("KernelSU IOCTL Commands:\n");
|
|
for (i = 0; ksu_ioctl_handlers[i].handler; i++) {
|
|
pr_info(" %-18s = 0x%08x\n", ksu_ioctl_handlers[i].name, ksu_ioctl_handlers[i].cmd);
|
|
}
|
|
#ifndef CONFIG_KSU_SUSFS
|
|
#ifdef KSU_KPROBES_HOOK
|
|
int rc = register_kprobe(&reboot_kp);
|
|
if (rc) {
|
|
pr_err("reboot kprobe failed: %d\n", rc);
|
|
} else {
|
|
pr_info("reboot kprobe registered successfully\n");
|
|
}
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
void ksu_supercalls_exit(void)
|
|
{
|
|
#ifndef CONFIG_KSU_SUSFS
|
|
#ifdef KSU_KPROBES_HOOK
|
|
unregister_kprobe(&reboot_kp);
|
|
#endif
|
|
#else
|
|
pr_info("susfs: do nothing\n");
|
|
#endif
|
|
}
|
|
|
|
static inline void ksu_ioctl_audit(unsigned int cmd, const char *cmd_name, uid_t uid, int ret)
|
|
{
|
|
#if __SULOG_GATE
|
|
const char *result = (ret == 0) ? "SUCCESS" :
|
|
(ret == -EPERM) ? "DENIED" : "FAILED";
|
|
ksu_sulog_report_syscall(uid, NULL, cmd_name, result);
|
|
#endif
|
|
}
|
|
|
|
// IOCTL dispatcher
|
|
static long anon_ksu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
int i;
|
|
|
|
#ifdef CONFIG_KSU_DEBUG
|
|
pr_info("ksu ioctl: cmd=0x%x from uid=%d\n", cmd, current_uid().val);
|
|
#endif
|
|
|
|
for (i = 0; ksu_ioctl_handlers[i].handler; i++) {
|
|
if (cmd == ksu_ioctl_handlers[i].cmd) {
|
|
// Check permission first
|
|
if (ksu_ioctl_handlers[i].perm_check &&
|
|
!ksu_ioctl_handlers[i].perm_check()) {
|
|
pr_warn("ksu ioctl: permission denied for cmd=0x%x uid=%d\n",
|
|
cmd, current_uid().val);
|
|
ksu_ioctl_audit(cmd, ksu_ioctl_handlers[i].name,
|
|
current_uid().val, -EPERM);
|
|
return -EPERM;
|
|
}
|
|
// Execute handler
|
|
int ret = ksu_ioctl_handlers[i].handler(argp);
|
|
ksu_ioctl_audit(cmd, ksu_ioctl_handlers[i].name,
|
|
current_uid().val, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
pr_warn("ksu ioctl: unsupported command 0x%x\n", cmd);
|
|
return -ENOTTY;
|
|
}
|
|
|
|
// File release handler
|
|
static int anon_ksu_release(struct inode *inode, struct file *filp)
|
|
{
|
|
pr_info("ksu fd released\n");
|
|
return 0;
|
|
}
|
|
|
|
// File operations structure
|
|
static const struct file_operations anon_ksu_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = anon_ksu_ioctl,
|
|
.compat_ioctl = anon_ksu_ioctl,
|
|
.release = anon_ksu_release,
|
|
};
|
|
|
|
// Install KSU fd to current process
|
|
int ksu_install_fd(void)
|
|
{
|
|
struct file *filp;
|
|
int fd;
|
|
|
|
// Get unused fd
|
|
fd = get_unused_fd_flags(O_CLOEXEC);
|
|
if (fd < 0) {
|
|
pr_err("ksu_install_fd: failed to get unused fd\n");
|
|
return fd;
|
|
}
|
|
|
|
// Create anonymous inode file
|
|
filp = anon_inode_getfile("[ksu_driver]", &anon_ksu_fops, NULL, O_RDWR | O_CLOEXEC);
|
|
if (IS_ERR(filp)) {
|
|
pr_err("ksu_install_fd: failed to create anon inode file\n");
|
|
put_unused_fd(fd);
|
|
return PTR_ERR(filp);
|
|
}
|
|
|
|
// Install fd
|
|
fd_install(fd, filp);
|
|
|
|
#if __SULOG_GATE
|
|
ksu_sulog_report_permission_check(current_uid().val, current->comm, fd >= 0);
|
|
#endif
|
|
|
|
pr_info("ksu fd installed: %d for pid %d\n", fd, current->pid);
|
|
|
|
return fd;
|
|
}
|