| commit | 14d8c9f3c09e7fd7b9af80904289fe204f5b93c6 | [log] [tgz] |
|---|---|---|
| author | Thomas Gleixner <tglx@linutronix.de> | Thu Dec 10 00:53:17 2009 +0000 |
| committer | Thomas Gleixner <tglx@linutronix.de> | Thu Dec 10 23:04:11 2009 +0100 |
| tree | 1c373436517c5853aab0e99cce83364a21134d0e | |
| parent | ea5b41f9d595be354f7a50e56b28c2d72e6e88a5 [diff] |
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>