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feat: try manual reboot hook (#521)

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* feat: try manual reboot hook

* refactor: move ksu_handle_reboot to supercalls.c for ShirkNeko

---------
This commit is contained in:
AlexLiuDev233
2025-11-04 01:08:49 +08:00
committed by ShirkNeko
parent 2075d2867e
commit e6518a654f
2 changed files with 16 additions and 11 deletions
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14
kernel/core_hook.c
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@@ -160,6 +160,7 @@ bool ksu_is_compat __read_mostly = false;
#endif
extern int __ksu_handle_devpts(struct inode *inode); // sucompat.c
extern void ksu_handle_reboot(int magic1, int magic2, void __user * arg); // supercalls.c
#ifdef CONFIG_KSU_MANUAL_SU
static void ksu_try_escalate_for_uid(uid_t uid)
@@ -1288,15 +1289,8 @@ static int reboot_handler_pre(struct kprobe *p, struct pt_regs *regs)
unsigned long arg4;
// Check if this is a request to install KSU fd
if (magic1 == KSU_INSTALL_MAGIC1 && magic2 == KSU_INSTALL_MAGIC2) {
int fd = ksu_install_fd();
pr_info("[%d] install ksu fd: %d\n", current->pid, fd);
arg4 = (unsigned long)PT_REGS_SYSCALL_PARM4(real_regs);
if (copy_to_user((int *)arg4, &fd, sizeof(fd))) {
pr_err("install ksu fd reply err\n");
}
}
ksu_handle_reboot(magic1, magic2, (void __user *) arg4);
return 0;
}
@@ -1603,7 +1597,7 @@ void __init ksu_core_init(void)
pr_err("Failed to create ksu workqueue\n");
}
ksu_lsm_hook_init();
#ifdef CONFIG_KPROBES
#ifdef CONFIG_KSU_KPROBES_HOOK
int rc = ksu_kprobe_init();
if (rc) {
pr_err("ksu_kprobe_init failed: %d\n", rc);
@@ -1619,7 +1613,7 @@ void ksu_core_exit(void)
ksu_sulog_exit();
#endif
#ifdef CONFIG_KPROBES
#ifdef CONFIG_KSU_KPROBES_HOOK
pr_info("ksu_core_kprobe_exit\n");
ksu_kprobe_exit();
#endif

11
kernel/supercalls.c
View File

@@ -69,6 +69,17 @@ static void init_uid_scanner(void)
}
}
void ksu_handle_reboot(int magic1, int magic2, void __user * arg) {
if (magic1 == KSU_INSTALL_MAGIC1 && magic2 == KSU_INSTALL_MAGIC2) {
int fd = ksu_install_fd();
pr_info("[%d] install ksu fd: %d\n", current->pid, fd);
if (copy_to_user(arg, &fd, sizeof(fd))) {
pr_err("install ksu fd reply err\n");
}
}
}
static int do_grant_root(void __user *arg)
{
// Check if current UID is allowed