Konstantin Khlebnikov ada79b5ecd sched/fair: Initialize throttle_count for new task-groups lazily ...

commit 094f469172 upstream.

Cgroup created inside throttled group must inherit current throttle_count.
Broken throttle_count allows to nominate throttled entries as a next buddy,
later this leads to null pointer dereference in pick_next_task_fair().

This patch initialize cfs_rq->throttle_count at first enqueue: laziness
allows to skip locking all rq at group creation. Lazy approach also allows
to skip full sub-tree scan at throttling hierarchy (not in this patch).

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bsegall@google.com
Link: http://lkml.kernel.org/r/146608182119.21870.8439834428248129633.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Ben Pineau <benjamin.pineau@mirakl.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-05-25 14:30:12 +02:00

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bpf

bpf, inode: disallow userns mounts

2016-06-24 10:18:17 -07:00

configs

kconfig: tinyconfig: provide whole choice blocks to avoid warnings

2016-09-24 10:07:42 +02:00

debug

kernel/debug/debug_core.c: more properly delay for secondary CPUs

2017-01-06 11:16:16 +01:00

events

perf/core: Fix concurrent sys_perf_event_open() vs. 'move_group' race

2017-04-30 05:49:29 +02:00

gcov

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irq

genirq/generic_chip: Add irq_unmap callback

2016-10-31 04:13:59 -06:00

livepatch

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locking

locking/rtmutex: Use READ_ONCE() in rt_mutex_owner()

2016-12-15 08:49:22 -08:00

power

PM / sleep: fix device reference leak in test_suspend

2016-11-26 09:54:53 +01:00

printk

printk: use rcuidle console tracepoint

2017-02-23 17:43:10 +01:00

rcu

rcu: Fix soft lockup for rcu_nocb_kthread

2016-12-08 07:15:24 +01:00

sched

sched/fair: Initialize throttle_count for new task-groups lazily

2017-05-25 14:30:12 +02:00

time

tick/broadcast: Prevent NULL pointer dereference

2017-01-12 11:22:51 +01:00

trace

ring-buffer: Have ring_buffer_iter_empty() return true when empty

2017-04-27 09:09:31 +02:00

.gitignore

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acct.c

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async.c

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audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit: fix exe_file access in audit_exe_compare

2016-09-24 10:07:36 +02:00

audit.c

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audit.h

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auditfilter.c

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auditsc.c

audit: fix a double fetch in audit_log_single_execve_arg()

2016-08-20 18:09:22 +02:00

backtracetest.c

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bounds.c

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capability.c

exec: Ensure mm->user_ns contains the execed files

2017-01-06 11:16:14 +01:00

cgroup_freezer.c

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cgroup_pids.c

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cgroup.c

cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups

2017-04-21 09:30:04 +02:00

compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

stable-fixup: hotplug: fix unused function warning

2017-01-12 11:22:48 +01:00

cpuset.c

cpuset: handle race between CPU hotplug and cpuset_hotplug_work

2016-10-07 15:23:40 +02:00

crash_dump.c

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cred.c

cred: Reject inodes with invalid ids in set_create_file_as()

2016-09-15 08:27:49 +02:00

delayacct.c

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dma.c

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elfcore.c

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exec_domain.c

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exit.c

wait/ptrace: assume __WALL if the child is traced

2016-06-07 18:14:35 -07:00

extable.c

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fork.c

pid_ns: Fix race between setns'ed fork() and zap_pid_ns_processes()

2017-05-25 14:30:11 +02:00

freezer.c

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futex_compat.c

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futex.c

futex: Add missing error handling to FUTEX_REQUEUE_PI

2017-03-22 12:04:19 +01:00

groups.c

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hung_task.c

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irq_work.c

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jump_label.c

jump_labels: API for flushing deferred jump label updates

2017-01-19 20:17:19 +01:00

kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kexec_core.c

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kexec_file.c

kexec: fix double-free when failing to relocate the purgatory

2016-09-24 10:07:36 +02:00

kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

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ksysfs.c

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kthread.c

cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups

2017-04-21 09:30:04 +02:00

latencytop.c

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Makefile

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membarrier.c

Fix: Disable sys_membarrier when nohz_full is enabled

2017-03-12 06:37:26 +01:00

memremap.c

mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}

2017-01-19 20:17:18 +01:00

module_signing.c

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module-internal.h

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module.c

module: Invalidate signatures on force-loaded modules

2016-08-20 18:09:27 +02:00

notifier.c

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nsproxy.c

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padata.c

padata: free correct variable

2017-05-20 14:27:02 +02:00

panic.c

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params.c

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pid_namespace.c

pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes

2017-05-25 14:30:11 +02:00

pid.c

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profile.c

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ptrace.c

ptrace: fix PTRACE_LISTEN race corrupting task->state

2017-04-12 12:38:33 +02:00

range.c

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reboot.c

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relay.c

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resource.c

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seccomp.c

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signal.c

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smp.c

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smpboot.c

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smpboot.h

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softirq.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

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sys.c

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sysctl_binary.c

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sysctl.c

mnt: Add a per mount namespace limit on the number of mounts

2017-04-30 05:49:28 +02:00

task_work.c

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taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

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tsacct.c

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uid16.c

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up.c

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user_namespace.c

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user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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watchdog.c

kernel/watchdog: use nmi registers snapshot in hardlockup handler

2017-01-06 11:16:16 +01:00

workqueue_internal.h

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workqueue.c

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