Commit 64372501 authored Jul 08, 2013 by Andrew Morton Committed by Al Viro Jul 13, 2013

fs/file_table.c:fput(): add comment

A missed update to "fput: task_work_add() can fail if the caller has
passed exit_task_work()".

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent bb458c64

fs/file_table.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -313,6 +313,12 @@ void fput(struct file *file)
		init_task_work(&file->f_u.fu_rcuhead, ____fput);
		if (!task_work_add(task, &file->f_u.fu_rcuhead, true))
		return;
		/*
		* After this task has run exit_task_work(),
		* task_work_add() will fail. free_ipc_ns()->
		* shm_destroy() can do this. Fall through to delayed
		* fput to avoid leaking *file.
		*/
		}
		spin_lock_irqsave(&delayed_fput_lock, flags);
		list_add(&file->f_u.fu_list, &delayed_fput_list);