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kernel: Rewrite the kernel source code (#554)

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* clean unused header

* on_module_mounted in ksud.c

* refact: use app_profile

* unified hook manager

* add zygote to hook target

* move reboot hook to supercall.c

* refactor: kernel_umount setuid_hook

* update mark rules, add init mark tracker

* remove reboot from check_syscall_fastpath

* update setuid_hook, remove uneeded sucompat enable

* log freely

* kernel: Migrate kprobe hook configuration items

* kernel: fix build

* cli: add ksud debug mark

* Fix rustfmt warning

---------

Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: Wang Han <416810799@qq.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
This commit is contained in:
ShirkNeko
2025-11-09 01:14:26 +08:00
committed by GitHub
parent 46b9f5fb4b
commit 548258f922
32 changed files with 1782 additions and 1282 deletions
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46
kernel/ksud.c
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@@ -1,7 +1,6 @@
#include <linux/rcupdate.h>
#include <linux/slab.h>
#include <linux/task_work.h>
#include "manager.h"
#include <asm/current.h>
#include <linux/compat.h>
#include <linux/cred.h>
@@ -15,8 +14,10 @@
#include <linux/printk.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/namei.h>
#include <linux/workqueue.h>
#include "manager.h"
#include "allowlist.h"
#include "arch.h"
#include "klog.h" // IWYU pragma: keep
@@ -24,8 +25,10 @@
#include "kernel_compat.h"
#include "selinux/selinux.h"
#include "sucompat.h"
#include "syscall_hook_manager.h"
bool ksu_module_mounted __read_mostly = false;
bool ksu_boot_completed __read_mostly = false;
static const char KERNEL_SU_RC[] =
"\n"
@@ -92,6 +95,45 @@ void on_post_fs_data(void)
pr_info("ksu_file sid: %d\n", ksu_file_sid);
}
extern void ext4_unregister_sysfs(struct super_block *sb);
static void nuke_ext4_sysfs(void)
{
#ifdef CONFIG_EXT4_FS
struct path path;
int err = kern_path("/data/adb/modules", 0, &path);
if (err) {
pr_err("nuke path err: %d\n", err);
return;
}
struct super_block *sb = path.dentry->d_inode->i_sb;
const char *name = sb->s_type->name;
if (strcmp(name, "ext4") != 0) {
pr_info("nuke but module aren't mounted\n");
path_put(&path);
return;
}
ext4_unregister_sysfs(sb);
path_put(&path);
#endif
}
void on_module_mounted(void){
pr_info("on_module_mounted!\n");
ksu_module_mounted = true;
nuke_ext4_sysfs();
}
void on_boot_completed(void){
ksu_boot_completed = true;
pr_info("on_boot_completed!\n");
// remark process, we don't want to mark other init
// forked process excepte zygote and adbd
ksu_unmark_all_process();
ksu_mark_running_process();
}
static void on_post_fs_data_cbfun(struct callback_head *cb)
{
on_post_fs_data();