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更新 KPM 模块，添加错误处理以确保用户数据复制成功

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This commit is contained in:
ShirkNeko
2025-03-31 20:39:40 +08:00
parent 72deeaa9a5
commit 9b9d72f200
1 changed files with 8 additions and 8 deletions
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16
kernel/kpm/kpm.c
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@@ -63,7 +63,7 @@ void sukisu_kpm_load_module_path(const char* path, const char* args, void* ptr,
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_load_module_path). path=%s args=%s ptr=%p\n", path, args, ptr); printk("KPM: Stub function called (sukisu_kpm_load_module_path). path=%s args=%s ptr=%p\n", path, args, ptr);
__asm__ volatile("nop"); // 精确控制循环不被优化 __asm__ volatile("nop"); // 精确控制循环不被优化
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -73,7 +73,7 @@ void sukisu_kpm_unload_module(const char* name, void* ptr, void __user* result)
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_unload_module). name=%s ptr=%p\n", name, ptr); printk("KPM: Stub function called (sukisu_kpm_unload_module). name=%s ptr=%p\n", name, ptr);
__asm__ volatile("nop"); // 精确控制循环不被优化 __asm__ volatile("nop"); // 精确控制循环不被优化
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -83,7 +83,7 @@ void sukisu_kpm_num(void __user* result) {
int res = 0; int res = 0;
printk("KPM: Stub function called (sukisu_kpm_num).\n"); printk("KPM: Stub function called (sukisu_kpm_num).\n");
__asm__ volatile("nop"); // 精确控制循环不被优化 __asm__ volatile("nop"); // 精确控制循环不被优化
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -93,7 +93,7 @@ void sukisu_kpm_info(const char* name, void __user* out, void __user* result) {
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_info). name=%s buffer=%p\n", name, out); printk("KPM: Stub function called (sukisu_kpm_info). name=%s buffer=%p\n", name, out);
__asm__ volatile("nop"); // 精确控制循环不被优化 __asm__ volatile("nop"); // 精确控制循环不被优化
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -102,7 +102,7 @@ void sukisu_kpm_list(void __user* out, unsigned int bufferSize, void __user* res
// This is a KPM module stub. // This is a KPM module stub.
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_list). buffer=%p size=%d\n", out, bufferSize); printk("KPM: Stub function called (sukisu_kpm_list). buffer=%p size=%d\n", out, bufferSize);
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -112,7 +112,7 @@ void sukisu_kpm_control(void __user* name, void __user* args, void __user* resul
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_control). name=%p args=%p\n", name, args); printk("KPM: Stub function called (sukisu_kpm_control). name=%p args=%p\n", name, args);
__asm__ volatile("nop"); // 精确控制循环不被优化 __asm__ volatile("nop"); // 精确控制循环不被优化
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
noinline noinline
@@ -120,7 +120,7 @@ NO_OPTIMIZE
void sukisu_kpm_version(void __user* out, unsigned int bufferSize, void __user* result) { void sukisu_kpm_version(void __user* out, unsigned int bufferSize, void __user* result) {
int res = -1; int res = -1;
printk("KPM: Stub function called (sukisu_kpm_version). buffer=%p size=%d\n", out, bufferSize); printk("KPM: Stub function called (sukisu_kpm_version). buffer=%p size=%d\n", out, bufferSize);
copy_to_user(result, &res, sizeof(res)); if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
} }
EXPORT_SYMBOL(sukisu_kpm_load_module_path); EXPORT_SYMBOL(sukisu_kpm_load_module_path);
@@ -177,7 +177,7 @@ int sukisu_handle_kpm(unsigned long arg2, unsigned long arg3, unsigned long arg4
return 0; return 0;
} }
void sukisu_is_kpm_control_code(unsigned long arg2) { int sukisu_is_kpm_control_code(unsigned long arg2) {
return (arg2 >= CMD_KPM_CONTROL && arg2 <= CMD_KPM_CONTROL_MAX) ? 1 : 0; return (arg2 >= CMD_KPM_CONTROL && arg2 <= CMD_KPM_CONTROL_MAX) ? 1 : 0;
} }