tree ebb225345da45a1bdc2384367122aba97f11b308
parent 177c27bf05d0ea508e65afdbe4b6998c81e46af5
author Oleg Nesterov <oleg@redhat.com> 1311902792 -0700
committer David S. Miller <davem@davemloft.net> 1311902792 -0700

proc_fork_connector: a lockless ->real_parent usage is not safe

proc_fork_connector() uses ->real_parent lockless.  This is not safe if
copy_process() was called with CLONE_THREAD or CLONE_PARENT, in this case
the parent != current can go away at any moment.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>