proc_fork_connector: a lockless ->real_parent usage is not safe
authorOleg Nesterov <oleg@redhat.com>
Fri, 29 Jul 2011 01:26:32 +0000 (18:26 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 29 Jul 2011 01:26:32 +0000 (18:26 -0700)
commit9e8f90dfe58eb19140bc66655170c7aef9eadbf2
treeebb225345da45a1bdc2384367122aba97f11b308
parent177c27bf05d0ea508e65afdbe4b6998c81e46af5
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>
drivers/connector/cn_proc.c