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kernel: Apply the susfs patch

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Co-authored-by: simonpunk <simonpunk2016@gmail.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
This commit is contained in:
ShirkNeko
2025-11-14 18:36:04 +08:00
parent 4920877dd8
commit 4c04508267
20 changed files with 982 additions and 77 deletions
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25
kernel/ksud.c
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@@ -33,7 +33,9 @@
#include "klog.h" // IWYU pragma: keep
#include "ksud.h"
#include "selinux/selinux.h"
#ifndef CONFIG_KSU_SUSFS
#include "syscall_hook_manager.h"
#endif // #ifndef CONFIG_KSU_SUSFS
bool ksu_module_mounted __read_mostly = false;
bool ksu_boot_completed __read_mostly = false;
@@ -65,7 +67,7 @@ static void stop_vfs_read_hook(void);
static void stop_execve_hook(void);
static void stop_input_hook(void);
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
static struct work_struct stop_vfs_read_work;
static struct work_struct stop_execve_hook_work;
static struct work_struct stop_input_hook_work;
@@ -90,8 +92,10 @@ void on_post_fs_data(void)
done = true;
pr_info("on_post_fs_data!\n");
ksu_load_allow_list();
#ifndef CONFIG_KSU_SUSFS
pr_info("mark tif for running process\n");
ksu_mark_running_process();
#endif // #ifndef CONFIG_KSU_SUSFS
ksu_observer_init();
// sanity check, this may influence the performance
stop_input_hook();
@@ -136,11 +140,15 @@ void on_module_mounted(void){
void on_boot_completed(void){
ksu_boot_completed = true;
pr_info("on_boot_completed!\n");
#ifndef CONFIG_KSU_SUSFS
// remark process, we don't want to mark other init
// forked process excepte zygote and adbd
ksu_unmark_all_process();
ksu_mark_running_process();
#endif // #ifndef CONFIG_KSU_SUSFS
}
#ifndef CONFIG_KSU_SUSFS
#define MAX_ARG_STRINGS 0x7FFFFFFF
struct user_arg_ptr {
#ifdef CONFIG_COMPAT
@@ -153,6 +161,7 @@ struct user_arg_ptr {
#endif
} ptr;
};
#endif // #ifndef CONFIG_KSU_SUSFS
static const char __user *get_user_arg_ptr(struct user_arg_ptr argv, int nr)
{
@@ -335,7 +344,9 @@ int ksu_handle_execveat_ksud(int *fd, struct filename **filename_ptr,
task_work_add(init_task, &on_post_fs_data_cb, TWA_RESUME);
}
rcu_read_unlock();
#ifndef CONFIG_KSU_SUSFS
ksu_set_task_tracepoint_flag(current); // we are zygote!
#endif
stop_execve_hook();
}
@@ -529,7 +540,7 @@ bool ksu_is_safe_mode()
return false;
}
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
static int sys_execve_handler_pre(struct kprobe *p, struct pt_regs *regs)
{
@@ -605,7 +616,7 @@ static void do_stop_input_hook(struct work_struct *work)
static void stop_vfs_read_hook(void)
{
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
bool ret = schedule_work(&stop_vfs_read_work);
pr_info("unregister vfs_read kprobe: %d!\n", ret);
#else
@@ -616,7 +627,7 @@ static void stop_vfs_read_hook(void)
static void stop_execve_hook(void)
{
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
bool ret = schedule_work(&stop_execve_hook_work);
pr_info("unregister execve kprobe: %d!\n", ret);
#else
@@ -632,7 +643,7 @@ static void stop_input_hook(void)
return;
}
input_hook_stopped = true;
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
bool ret = schedule_work(&stop_input_hook_work);
pr_info("unregister input kprobe: %d!\n", ret);
#else
@@ -644,7 +655,7 @@ static void stop_input_hook(void)
// ksud: module support
void ksu_ksud_init(void)
{
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
int ret;
ret = register_kprobe(&execve_kp);
@@ -664,7 +675,7 @@ void ksu_ksud_init(void)
void ksu_ksud_exit(void)
{
#ifdef KSU_KPROBES_HOOK
#if defined(KSU_KPROBES_HOOK) && !defined(CONFIG_KSU_SUSFS)
unregister_kprobe(&execve_kp);
// this should be done before unregister vfs_read_kp
// unregister_kprobe(&vfs_read_kp);