diff --git a/frameworks/native/backup_ext/src/ext_extension.cpp b/frameworks/native/backup_ext/src/ext_extension.cpp
index ec7f43d1432fceb2933666de7b25aa4be068be67..eca607d52feab5e7791e69b379898400dce64803 100644
--- a/frameworks/native/backup_ext/src/ext_extension.cpp
+++ b/frameworks/native/backup_ext/src/ext_extension.cpp
@@ -394,6 +394,10 @@ ErrCode BackupExtExtension::GetIncrementalFileHandle(const std::string &fileName
     HITRACE_METER_NAME(HITRACE_TAG_FILEMANAGEMENT, __PRETTY_FUNCTION__);
     auto [errCode, fdval, reportFdVal] = GetIncrementalFileHandle(fileName);
     fdErrCode = errCode;
+    if (fdval.Get() == BConstants::INVALID_FD_NUM || reportFdVal.Get() == BConstants::INVALID_FD_NUM) {
+        HILOGE("fd invalid, fdval:%{public}d, reportFdVal:%{public}d", fdval.Get(), reportFdVal.Get());
+        return EPERM;
+    }
     fd = dup(fdval.Get());
     reportFd = dup(reportFdVal.Get());
     return ERR_OK;
@@ -477,7 +481,7 @@ ErrCode BackupExtExtension::IndexFileReady(const TarMap &pkgInfo, sptr<IService>
     }
     int fdval = open(INDEX_FILE_BACKUP.data(), O_RDONLY);
     ErrCode ret = fdval < 0 ?
-            proxy->AppFileReadyWithoutFd(string(BConstants::EXT_BACKUP_MANAGE), ERR_OK) :
+            proxy->AppFileReadyWithoutFd(string(BConstants::EXT_BACKUP_MANAGE), BError::GetCodeByErrno(errno)) :
             proxy->AppFileReady(string(BConstants::EXT_BACKUP_MANAGE), fdval, ERR_OK);
     if (SUCCEEDED(ret)) {
         HILOGI("The application is packaged successfully");
@@ -2096,7 +2100,7 @@ ErrCode BackupExtExtension::IncrementalTarFileReady(const TarMap &bigFileInfo,
     int fd = open(tarName.data(), O_RDONLY);
     int manifestFd = open(file.data(), O_RDONLY);
     ErrCode ret = (fd < 0 || manifestFd < 0) ?
-                  proxy->AppIncrementalFileReadyWithoutFd(tarFile, ERR_OK) :
+                  proxy->AppIncrementalFileReadyWithoutFd(tarFile, BError::GetCodeByErrno(errno)) :
                   proxy->AppIncrementalFileReady(tarFile, fd, manifestFd, ERR_OK);
     if (SUCCEEDED(ret)) {
         HILOGI("IncrementalTarFileReady: The application is packaged successfully");
@@ -2193,7 +2197,8 @@ ErrCode BackupExtExtension::IncrementalAllFileReady(const TarMap &pkgInfo,
     int fdval = open(INDEX_FILE_BACKUP.data(), O_RDONLY);
     int manifestFdval = open(file.data(), O_RDONLY);
     ErrCode ret = (fdval < 0 || manifestFdval < 0) ?
-            proxy->AppIncrementalFileReadyWithoutFd(string(BConstants::EXT_BACKUP_MANAGE), ERR_OK) :
+            proxy->AppIncrementalFileReadyWithoutFd(string(BConstants::EXT_BACKUP_MANAGE),
+                BError::GetCodeByErrno(errno)) :
             proxy->AppIncrementalFileReady(string(BConstants::EXT_BACKUP_MANAGE), fdval, manifestFdval, ERR_OK);
     if (SUCCEEDED(ret)) {
         HILOGI("IncrementalAllFileReady successfully");