Oleg Nesterov 52ee2dfdd4 pids: refactor vnr/nr_ns helpers to make them safe ...

Inho, the safety rules for vnr/nr_ns helpers are horrible and buggy.

task_pid_nr_ns(task) needs rcu/tasklist depending on task == current.

As for "special" pids, vnr/nr_ns helpers always need rcu.  However, if
task != current, they are unsafe even under rcu lock, we can't trust
task->group_leader without the special checks.

And almost every helper has a callsite which needs a fix.

Also, it is a bit annoying that the implementations of, say,
task_pgrp_vnr() and task_pgrp_nr_ns() are not "symmetrical".

This patch introduces the new helper, __task_pid_nr_ns(), which is always
safe to use, and turns all other helpers into the trivial wrappers.

After this I'll send another patch which converts task_tgid_xxx() as well,
they're are a bit special.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Louis Rilling <Louis.Rilling@kerlabs.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-04-02 19:05:02 -07:00

..

irq

PM: Introduce functions for suspending and resuming device interrupts

2009-03-30 21:46:54 +02:00

power

pm: rework includes, remove arch ifdefs

2009-04-01 08:59:16 -07:00

time

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-26 16:05:42 -07:00

trace

Merge commit 'origin/master' into next

2009-03-11 17:10:07 +11:00

.gitignore

Update kernel/.gitignore with new auto-generated files

2008-02-09 23:27:01 -08:00

acct.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

async.c

async: remove the temporary (2.6.29) "async is off by default" code

2009-03-28 13:05:30 -07:00

audit_tree.c

audit: validate comparison operations, store them in sane form

2009-01-04 15:14:42 -05:00

audit.c

[PATCH] fix broken timestamps in AVC generated by kernel threads

2008-12-09 02:27:41 -05:00

audit.h

fixing audit rule ordering mess, part 1

2009-01-04 15:14:41 -05:00

auditfilter.c

audit: validate comparison operations, store them in sane form

2009-01-04 15:14:42 -05:00

auditsc.c

make sure that filterkey of task,always rules is reported

2009-01-04 15:14:42 -05:00

backtracetest.c

backtrace: replace timer with tasklet + completions

2008-06-27 18:09:16 +02:00

bounds.c

Add kbuild.h that contains common definitions for kbuild users

2008-04-29 08:06:29 -07:00

capability.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

cgroup_debug.c

debug cgroup: remove unneeded cgroup_lock

2009-04-02 19:04:54 -07:00

cgroup_freezer.c

freezer_cg: disable writing freezer.state of root cgroup

2008-11-12 17:17:16 -08:00

cgroup.c

memcg: fix OOM killer under memcg

2009-04-02 19:04:55 -07:00

compat.c

Allow times and time system calls to return small negative values

2009-01-06 15:59:13 -08:00

configs.c

kernel/configs.c: remove useless comments

2008-10-20 08:52:34 -07:00

cpu.c

cpumask: use set_cpu_active in init/main.c

2009-03-30 22:05:12 +10:30

cpuset.c

cpusets: prevent PF_THREAD_BOUND tasks from attaching to non-root cpusets

2009-04-02 19:04:57 -07:00

cred-internals.h

CRED: Inaugurate COW credentials

2008-11-14 10:39:23 +11:00

cred.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

2009-01-09 13:59:25 -08:00

delayacct.c

schedstat: consolidate per-task cpu runtime stats

2008-12-18 13:54:01 +01:00

dma-coherent.c

dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy.

2009-01-21 18:51:53 +09:00

dma.c

kernel/dma.c: remove a CVS keyword

2008-10-16 11:21:30 -07:00

exec_domain.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

exit.c

pids: improve get_task_pid() to fix the unsafe sys_wait4()->task_pgrp()

2009-04-02 19:05:02 -07:00

extable.c

Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-30 16:10:19 -08:00

fork.c

signals: protect cinit from blocked fatal signals

2009-04-02 19:04:58 -07:00

freezer.c

freezer_cg: use thaw_process() in unfreeze_cgroup()

2008-10-30 11:38:45 -07:00

futex_compat.c

CRED: Use RCU to access another task's creds and to release a task's own creds

2008-11-14 10:39:19 +11:00

futex.c

futex: remove the pointer math from double_unlock_hb, fix

2009-03-13 10:32:07 +01:00

hrtimer.c

hrtimer: prevent negative expiry value after clock_was_set()

2009-01-30 22:35:34 +01:00

itimer.c

timers: split process wide cpu clocks/timers

2009-02-05 13:04:33 +01:00

kallsyms.c

Revert "kbuild: strip generated symbols from *.ko"

2009-01-14 21:38:20 +01:00

Kconfig.freezer

container freezer: implement freezer cgroup subsystem

2008-10-20 08:52:34 -07:00

Kconfig.hz

sched: fix SCHED_HRTICK dependency

2008-07-28 14:37:38 +02:00

Kconfig.preempt

rcu: provide RCU options on non-preempt architectures too

2008-12-25 09:31:28 +01:00

kexec.c

kexec: Change kexec jump code ordering

2009-03-30 21:46:55 +02:00

kfifo.c

is_power_of_2: kernel/kfifo.c

2007-07-16 09:05:50 -07:00

kgdb.c

kgdb: call touch_softlockup_watchdog on resume

2008-10-06 13:50:59 -05:00

kmod.c

cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL

2009-03-30 22:05:11 +10:30

kprobes.c

kprobes: check CONFIG_FREEZER instead of CONFIG_PM

2009-01-16 14:32:17 -05:00

ksysfs.c

kernel/ksysfs.c:fix dependence on CONFIG_NET

2009-01-06 10:44:31 -08:00

kthread.c

cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL

2009-03-30 22:05:11 +10:30

latencytop.c

sched, latencytop: incorporate review feedback from Andrew Morton

2009-02-11 10:18:04 +01:00

lockdep_internals.h

lockdep: get_user_chars() redo

2009-02-14 23:28:22 +01:00

lockdep_proc.c

lockstat: warn about disabled lock debugging

2009-02-14 23:28:28 +01:00

lockdep_states.h

lockdep: move state bit definitions around

2009-02-14 23:27:59 +01:00

lockdep.c

lockdep: fix deadlock in lockdep_trace_alloc

2009-03-30 23:19:24 +02:00

Makefile

PM: fix build for CONFIG_PM unset

2009-02-21 14:17:17 -08:00

marker.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

module.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

mutex-debug.c

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex-debug.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex.c

mutex: adaptive spinnning, performance tweaks

2009-01-14 19:03:54 +01:00

mutex.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

notifier.c

Merge commit 'v2.6.28-rc6' into core/debug

2008-11-26 08:22:50 +01:00

ns_cgroup.c

cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups

2009-04-02 19:04:53 -07:00

nsproxy.c

User namespaces: set of cleanups (v2)

2008-11-24 18:57:41 -05:00

panic.c

stackprotector: update make rules

2009-02-10 00:41:54 +01:00

params.c

Fix compile warning in kernel/params.c

2008-10-23 12:09:00 -07:00

pid_namespace.c

signals: zap_pid_ns_process() should use force_sig()

2009-04-02 19:04:58 -07:00

pid.c

pids: refactor vnr/nr_ns helpers to make them safe

2009-04-02 19:05:02 -07:00

pm_qos_params.c

pm_qos_requirement might sleep

2008-09-02 19:21:40 -07:00

posix-cpu-timers.c

posix timers: fix RLIMIT_CPU && fork()

2009-03-23 20:43:35 +01:00

posix-timers.c

[CVE-2009-0029] System call wrappers part 05

2009-01-14 14:15:20 +01:00

printk.c

PM: Fix suspend_console and resume_console to use only one semaphore

2009-02-21 14:17:18 -08:00

profile.c

profiling: fix broken profiling regression

2009-02-10 00:50:37 +01:00

ptrace.c

ptrace_untrace: fix the SIGNAL_STOP_STOPPED check

2009-04-02 19:05:00 -07:00

rcuclassic.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcupdate.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcupreempt_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcupreempt.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcutorture.c

cpumask: convert rcutorture.c

2009-03-30 22:05:16 +10:30

rcutree_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcutree.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

relay.c

timers: add mod_timer_pending()

2009-02-18 19:26:33 +01:00

res_counter.c

memcg: memory cgroup resource counters for hierarchy

2009-01-08 08:31:05 -08:00

resource.c

resources: fix parameter name and kernel-doc

2009-01-15 16:39:38 -08:00

rtmutex_common.h

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.c

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.h

…

rtmutex-tester.c

sysdev: Pass the attribute to the low level sysdev show/store function

2008-07-21 21:55:02 -07:00

rtmutex.c

hrtimer: convert kernel/* to the new hrtimer apis

2008-09-05 21:35:13 -07:00

rtmutex.h

…

rwsem.c

sched: mark rwsem functions as __sched for wchan/profiling

2007-12-18 15:21:13 +01:00

sched_clock.c

sched_clock: cleanups

2009-02-26 21:56:07 +01:00

sched_cpupri.c

sched: fix section mismatch

2009-01-06 11:07:15 +01:00

sched_cpupri.h

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sched_debug.c

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched_fair.c

Merge branch 'sched/urgent'; commit 'v2.6.29-rc5' into sched/core

2009-02-15 21:15:16 +01:00

sched_features.h

Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-30 17:17:35 -07:00

sched_idletask.c

sched: add CONFIG_SMP consistency

2008-10-22 10:01:52 +02:00

sched_rt.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

sched_stats.h

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched.c

epoll keyed wakeups: add __wake_up_locked_key() and __wake_up_sync_key()

2009-04-01 08:59:20 -07:00

seccomp.c

x86-64: seccomp: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

semaphore.c

semaphore: __down_common: use signal_pending_state()

2008-08-05 14:33:47 -07:00

signal.c

signals: SI_USER: Masquerade si_pid when crossing pid ns boundary

2009-04-02 19:04:58 -07:00

smp.c

generic-ipi: use per cpu data for single cpu ipi calls

2009-01-30 18:31:08 +01:00

softirq.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

softlockup.c

softlock: fix false panic which can occur if softlockup_thresh is reduced

2009-01-14 11:48:07 +01:00

spinlock.c

lockdep: spin_lock_nest_lock(), checkpatch fixes

2008-08-13 13:56:51 +02:00

srcu.c

make srcu_readers_active() static

2008-02-06 10:41:02 -08:00

stacktrace.c

stacktrace: provide save_stack_trace_tsk() weak alias

2008-12-25 11:44:43 +01:00

stop_machine.c

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sys_ni.c

[CVE-2009-0029] Make sys_syslog a conditional system call

2009-01-14 14:15:16 +01:00

sys.c

sched: don't allow setuid to succeed if the user does not have rt bandwidth

2009-02-27 11:11:53 +01:00

sysctl_check.c

net: add ARP notify option for devices

2009-02-01 01:04:33 -08:00

sysctl.c

sysctl: fix suid_dumpable and lease-break-time sysctls

2009-04-02 19:05:01 -07:00

taskstats.c

cpumask: convert rest of files in kernel/

2009-01-01 10:12:28 +10:30

test_kprobes.c

kprobes: add tests for register_kprobes

2009-01-06 15:59:20 -08:00

time.c

[CVE-2009-0029] System call wrappers part 01

2009-01-14 14:15:18 +01:00

timeconst.pl

Make constants in kernel/timeconst.h fixed 64 bits

2008-05-02 16:18:42 -07:00

timer.c

Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-30 17:17:35 -07:00

tracepoint.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

tsacct.c

Fix fixpoint divide exception in acct_update_integrals

2009-03-09 08:13:35 -07:00

uid16.c

[CVE-2009-0029] System call wrappers part 19

2009-01-14 14:15:26 +01:00

up.c

smp_call_function_single(): be slightly less stupid, fix #2

2009-01-12 16:04:37 +01:00

user_namespace.c

Fix recursive lock in free_uid()/free_user_ns()

2009-02-27 16:26:21 -08:00

user.c

Merge branch 'master' into next

2009-03-24 10:52:46 +11:00

utsname_sysctl.c

proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlers

2009-04-02 19:05:01 -07:00

utsname.c

removed unused #include <linux/version.h>'s

2008-08-23 12:14:12 -07:00

wait.c

wait: prevent exclusive waiter starvation

2009-02-05 12:56:48 -08:00

workqueue.c

workqueue: avoid recursion in run_workqueue()

2009-04-02 19:05:00 -07:00