diff --git a/fs/file.c b/fs/file.c
index 34d8d09756e5..07bdf5bb93a6 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -944,6 +944,27 @@ struct file *fget_task(struct task_struct *task, unsigned int fd)
 	return file;
 }
 
+struct file *task_lookup_next_fd_rcu(struct task_struct *task, unsigned int *ret_fd)
+{
+	/* Must be called with rcu_read_lock held */
+	struct files_struct *files;
+	unsigned int fd = *ret_fd;
+	struct file *file = NULL;
+
+	task_lock(task);
+	files = task->files;
+	if (files) {
+		for (; fd < files_fdtable(files)->max_fds; fd++) {
+			file = files_lookup_fd_rcu(files, fd);
+			if (file)
+				break;
+		}
+	}
+	task_unlock(task);
+	*ret_fd = fd;
+	return file;
+}
+
 /*
  * Lightweight file lookup - no refcnt increment if fd table isn't shared.
  *
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 54d3df973c34..6627a5350ae9 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -101,6 +101,7 @@ static inline struct file *files_lookup_fd_rcu(struct files_struct *files, unsig
  * Check whether the specified fd has an open file.
  */
 #define fcheck(fd)	files_lookup_fd_rcu(current->files, fd)
+struct file *task_lookup_next_fd_rcu(struct task_struct *task, unsigned int *fd);
 
 struct task_struct;