Konstantin Khlebnikov c58f0e847b sched/core: Handle overflow in cpu_shares_write_u64 ...

[ Upstream commit 5b61d50ab4ef590f5e1d4df15cd2cea5f5715308 ]

Bit shift in scale_load() could overflow shares. This patch saturates
it to MAX_SHARES like following sched_group_set_shares().

Example:

 # echo 9223372036854776832 > cpu.shares
 # cat cpu.shares

Before patch: 1024
After pattch: 262144

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/155125501891.293431.3345233332801109696.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2019-05-31 06:48:22 -07:00

..

auto_group.c

sched/autogroup: Fix 64-bit kernel nice level adjustment

2016-11-24 05:45:02 +01:00

auto_group.h

sched, timer: Convert usages of ACCESS_ONCE() in the scheduler to READ_ONCE()/WRITE_ONCE()

2015-05-08 12:11:32 +02:00

clock.c

sched/clock: Make local_clock()/cpu_clock() inline

2016-04-13 12:25:22 +02:00

completion.c

sched/completion: Serialize completion_done() with complete()

2015-02-18 14:27:40 +01:00

core.c

sched/core: Handle overflow in cpu_shares_write_u64

2019-05-31 06:48:22 -07:00

cpuacct.c

sched/cputime: Convert kcpustat to nsecs

2018-10-20 09:51:32 +02:00

cpuacct.h

sched/cpuacct: Simplify the cpuacct code

2016-03-21 11:00:28 +01:00

cpudeadline.c

sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()

2016-09-05 13:29:43 +02:00

cpudeadline.h

sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()

2016-09-05 13:29:43 +02:00

cpufreq_schedutil.c

cpufreq: schedutil: Fix per-CPU structure initialization in sugov_start()

2017-06-14 15:06:05 +02:00

cpufreq.c

cpufreq / sched: Pass flags to cpufreq_update_util()

2016-08-16 22:14:55 +02:00

cpupri.c

sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed

2016-05-12 09:55:35 +02:00

cpupri.h

sched/cpupri: Remove unnecessary definitions in cpupri.h

2014-11-16 10:58:59 +01:00

cputime.c

sched/cputime: Fix ksoftirqd cputime accounting regression

2018-10-20 09:51:32 +02:00

deadline.c

sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks

2018-04-13 19:48:23 +02:00

debug.c

Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2016-10-14 12:18:50 -07:00

fair.c

sched/numa: Fix a possible divide-by-zero

2019-05-02 09:32:01 +02:00

features.h

sched/fair: Make select_idle_cpu() more aggressive

2017-12-14 09:28:17 +01:00

idle_task.c

sched/core: Rewrite and improve select_idle_siblings()

2016-09-30 11:03:09 +02:00

idle.c

nmi_backtrace: generate one-line reports for idle cpus

2016-10-07 18:46:30 -07:00

loadavg.c

sched/loadavg: Avoid loadavg spikes caused by delayed NO_HZ accounting

2017-07-05 14:40:28 +02:00

Makefile

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

rt.c

sched/rt: Fix rq->clock_update_flags < RQCF_ACT_SKIP warning

2018-05-30 07:50:41 +02:00

sched.h

sched: Add sched_smt_active()

2019-05-14 19:19:36 +02:00

stats.c

sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

stats.h

sched/debug: Rename 'schedstat_val()' -> 'schedstat_val_or_zero()'

2016-09-05 13:29:46 +02:00

stop_task.c

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

swait.c

sched/wait: Remove the lockless swait_active() check in swake_up*()

2018-08-06 16:23:02 +02:00

wait.c

mm: remove per-zone hashtable of bitlock waitqueues

2016-10-27 09:27:57 -07:00