tree 08cc78496b9c1251dc21d2f52a8f995b955f8b81
parent da891641b6c92e260966dfce3dd93111d08656c8
author Patrick Donnelly <batrick@batbytes.com> 1436741512 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1437699398 -0700

tty: add missing rcu_read_lock for task_pgrp

task_pgrp requires an rcu or tasklist lock to be obtained if the returned pid
is to be dereferenced, which kill_pgrp does. Obtain an RCU lock for the
duration of use.

Signed-off-by: Patrick Donnelly <batrick@batbytes.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>