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kernel: use sys_enter tracepoint for sucompat (#533)

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* use sys_enter tracepoint for sucompat

* update sucompat rules

* clean tif mark

* mark tif after load allow list

* clear all tif first, then mark target

* Fix shell su

* allow when escape

* fix bugs

* kernel: Resolve logical inconsistencies

---------

Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: weishu <twsxtd@gmail.com>
This commit is contained in:
ShirkNeko
2025-11-06 12:45:37 +08:00
committed by GitHub
parent 0ce7bc2627
commit 5323a500dd
17 changed files with 204 additions and 277 deletions
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21
kernel/ksud.c
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@@ -49,7 +49,7 @@ static void stop_vfs_read_hook();
static void stop_execve_hook();
static void stop_input_hook();
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
static struct work_struct stop_vfs_read_work;
static struct work_struct stop_execve_hook_work;
static struct work_struct stop_input_hook_work;
@@ -74,6 +74,9 @@ void on_post_fs_data(void)
done = true;
pr_info("on_post_fs_data!\n");
ksu_load_allow_list();
extern void ksu_mark_running_process(void);
pr_info("mark tif for running process\n");
ksu_mark_running_process();
ksu_observer_init();
// sanity check, this may influence the performance
stop_input_hook();
@@ -268,7 +271,7 @@ static ssize_t read_iter_proxy(struct kiocb *iocb, struct iov_iter *to)
int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
size_t *count_ptr, loff_t **pos)
{
#ifndef CONFIG_KSU_KPROBES_HOOK
#ifndef KSU_KPROBES_HOOK
if (!ksu_vfs_read_hook) {
return 0;
}
@@ -381,7 +384,7 @@ static bool is_volumedown_enough(unsigned int count)
int ksu_handle_input_handle_event(unsigned int *type, unsigned int *code,
int *value)
{
#ifndef CONFIG_KSU_KPROBES_HOOK
#ifndef KSU_KPROBES_HOOK
if (!ksu_input_hook) {
return 0;
}
@@ -423,7 +426,7 @@ bool ksu_is_safe_mode()
return false;
}
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
static int sys_execve_handler_pre(struct kprobe *p, struct pt_regs *regs)
{
/*
@@ -596,7 +599,7 @@ static void do_stop_input_hook(struct work_struct *work)
static void stop_vfs_read_hook()
{
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
bool ret = schedule_work(&stop_vfs_read_work);
pr_info("unregister vfs_read kprobe: %d!\n", ret);
#else
@@ -607,7 +610,7 @@ static void stop_vfs_read_hook()
static void stop_execve_hook()
{
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
bool ret = schedule_work(&stop_execve_hook_work);
pr_info("unregister execve kprobe: %d!\n", ret);
#else
@@ -623,7 +626,7 @@ static void stop_input_hook()
return;
}
input_hook_stopped = true;
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
bool ret = schedule_work(&stop_input_hook_work);
pr_info("unregister input kprobe: %d!\n", ret);
#else
@@ -635,7 +638,7 @@ static void stop_input_hook()
// ksud: module support
void ksu_ksud_init()
{
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
int ret;
ret = register_kprobe(&execve_kp);
@@ -655,7 +658,7 @@ void ksu_ksud_init()
void ksu_ksud_exit()
{
#ifdef CONFIG_KSU_KPROBES_HOOK
#ifdef KSU_KPROBES_HOOK
unregister_kprobe(&execve_kp);
// this should be done before unregister vfs_read_kp
// unregister_kprobe(&vfs_read_kp);