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kernel: Undo some changes

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This commit is contained in:
ShirkNeko
2025-11-09 16:09:59 +08:00
parent 05ed1a3714
commit 184467c691
6 changed files with 238 additions and 481 deletions
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51
kernel/syscall_hook_manager.c
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@@ -209,7 +209,6 @@ static inline bool check_syscall_fastpath(int nr)
case __NR_execve:
case __NR_setresuid:
case __NR_faccessat2:
case __NR_execveat:
case __NR_clone:
case __NR_clone3:
return true;
@@ -242,10 +241,6 @@ int ksu_handle_init_mark_tracker(int *fd, const char __user **filename_user,
#include "manual_su.h"
#endif
#ifdef CONFIG_COMPAT
bool ksu_is_compat __read_mostly = false;
#endif
#ifndef LOOKUP_FOLLOW
#define LOOKUP_FOLLOW 0x0001
#endif
@@ -266,48 +261,6 @@ static inline void ksu_handle_inode_permission(struct pt_regs *regs)
}
}
static inline void ksu_handle_bprm_check_security(struct pt_regs *regs, long id)
{
const char __user *filename;
char path_buf[256];
if (id == __NR_execve)
filename = (const char __user *)PT_REGS_PARM1(regs);
else /* __NR_execveat */
filename = (const char __user *)PT_REGS_PARM2(regs);
if (!ksu_execveat_hook)
return;
memset(path_buf, 0, sizeof(path_buf));
strncpy_from_user_nofault(path_buf, filename, sizeof(path_buf));
#ifdef CONFIG_COMPAT
static bool compat_check_done __read_mostly = false;
if (unlikely(!compat_check_done) &&
unlikely(!strcmp(path_buf, "/data/adb/ksud"))) {
char buf[4];
struct file *file = filp_open(path_buf, O_RDONLY, 0);
if (!IS_ERR(file)) {
loff_t pos = 0;
kernel_read(file, buf, 4, &pos);
if (!memcmp(buf, "\x7f\x45\x4c\x46", 4)) {
char elf_class;
pos = 4;
kernel_read(file, &elf_class, 1, &pos);
if (elf_class == 0x01)
ksu_is_compat = true;
pr_info("%s: %s ELF magic found! ksu_is_compat: %d\n",
__func__, path_buf, ksu_is_compat);
compat_check_done = true;
}
filp_close(file, NULL);
}
}
#endif
ksu_handle_pre_ksud(path_buf);
}
static inline void ksu_handle_task_alloc(struct pt_regs *regs)
{
#ifdef CONFIG_KSU_MANUAL_SU
@@ -371,10 +324,6 @@ static void ksu_sys_enter_handler(void *data, struct pt_regs *regs, long id)
if (id == __NR_faccessat || id == __NR_faccessat2)
return ksu_handle_inode_permission(regs);
// Handle bprm_check_security via execve/execveat
if (id == __NR_execve || id == __NR_execveat)
return ksu_handle_bprm_check_security(regs, id);
#ifdef CONFIG_KSU_MANUAL_SU
// Handle task_alloc via clone/fork
if (id == __NR_clone || id == __NR_clone3)