Commits
Thomas Gleixner committed 14d8c9f3c09
signal: Fix racy access to __task_cred in kill_pid_info_as_uid() kill_pid_info_as_uid() accesses __task_cred() without being in a RCU read side critical section. tasklist_lock is not protecting that when CONFIG_TREE_PREEMPT_RCU=y. Convert the whole tasklist_lock section to rcu and use lock_task_sighand to prevent the exit race. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <20091210004703.232302055@linutronix.de> Acked-by: Oleg Nesterov <oleg@redhat.com>