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修复 KPM 模块中 copy_to_user 调用的错误处理，确保在复制失败时记录错误信息

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This commit is contained in:
ShirkNeko
2025-04-01 12:04:40 +08:00
parent dc8b89adde
commit 88a84b71b7
1 changed files with 21 additions and 7 deletions
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28
kernel/kpm/kpm.c
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@@ -63,7 +63,9 @@ __section(".text") void sukisu_kpm_load_module_path(const char* path, const char
int res = -1;
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
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -73,7 +75,9 @@ __section(".text") void sukisu_kpm_unload_module(const char* name, void* ptr, vo
int res = -1;
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
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -83,7 +87,9 @@ __section(".text") void sukisu_kpm_num(void __user* result) {
int res = 0;
printk("KPM: Stub function called (sukisu_kpm_num).\n");
__asm__ volatile("nop"); // 精确控制循环不被优化
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -93,7 +99,9 @@ __section(".text") void sukisu_kpm_info(const char* name, void __user* out, void
int res = -1;
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
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -102,7 +110,9 @@ __section(".text") void sukisu_kpm_list(void __user* out, unsigned int bufferSiz
// This is a KPM module stub.
int res = -1;
printk("KPM: Stub function called (sukisu_kpm_list). buffer=%p size=%d\n", out, bufferSize);
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -112,7 +122,9 @@ __section(".text") void sukisu_kpm_control(void __user* name, void __user* args,
int res = -1;
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
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
noinline
@@ -120,7 +132,9 @@ NO_OPTIMIZE
__section(".text") void sukisu_kpm_version(void __user* out, unsigned int bufferSize, void __user* result) {
int res = -1;
printk("KPM: Stub function called (sukisu_kpm_version). buffer=%p size=%d\n", out, bufferSize);
if(copy_to_user(result, &res, sizeof(res)) < 1) printk("KPM: Copy to user faild.");
if (copy_to_user(result, &res, sizeof(res)) != 0) {
printk(KERN_ERR "KPM: Copy to user failed.\n");
}
}
EXPORT_SYMBOL(sukisu_kpm_load_module_path);