--- x/fs/read_write.c
+++ y/fs/read_write.c	2024-06-12 18:38:40.826180800 +0800
@@ -583,6 +583,7 @@ ssize_t vfs_write(struct file *file, con
 		return ret;
 	if (count > MAX_RW_COUNT)
 		count =  MAX_RW_COUNT;
+	ihold(file_inode(file));
 	file_start_write(file);
 	if (file->f_op->write)
 		ret = file->f_op->write(file, buf, count, pos);
@@ -596,6 +597,7 @@ ssize_t vfs_write(struct file *file, con
 	}
 	inc_syscw(current);
 	file_end_write(file);
+	iput(file_inode(file));
 	return ret;
 }