diff --git a/kernel/base/vm/los_vm_filemap.c b/kernel/base/vm/los_vm_filemap.c
index 8b88e85dba06978b6bca31cf0acd53142411493c..b4c11d81493d77c9a12c1165f00b2ac569b6ff16 100644
--- a/kernel/base/vm/los_vm_filemap.c
+++ b/kernel/base/vm/los_vm_filemap.c
@@ -661,7 +661,7 @@ STATUS_T OsNamedMMap(struct file *filep, LosVmMapRegion *region)
             return LOS_ERRNO_VM_MAP_FAILED;
         }
     } else if (INODE_IS_DRIVER(inodePtr)) {
-        if (inodePtr->u.i_ops->mmap) {
+        if (inodePtr->u.i_ops && inodePtr->u.i_ops->mmap) {
             LOS_SetRegionTypeDev(region);
             return inodePtr->u.i_ops->mmap(filep, region);
         } else {