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linux/kernel/sched
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Peter Zijlstra b1e8206582 sched: Fix yet more sched_fork() races 
Where commit 4ef0c5c6b5ba ("kernel/sched: Fix sched_fork() access an
invalid sched_task_group") fixed a fork race vs cgroup, it opened up a
race vs syscalls by not placing the task on the runqueue before it
gets exposed through the pidhash.

Commit 13765de8148f ("sched/fair: Fix fault in reweight_entity") is
trying to fix a single instance of this, instead fix the whole class
of issues, effectively reverting this commit.

Fixes: 4ef0c5c6b5ba ("kernel/sched: Fix sched_fork() access an invalid sched_task_group")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Tested-by: Zhang Qiao <zhangqiao22@huawei.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lkml.kernel.org/r/YgoeCbwj5mbCR0qA@hirez.programming.kicks-ass.net
2022-02-19 11:11:05 +01:00
..
autogroup.c
sched/fair: Prevent dead task groups from regaining cfs_rq's
2021-11-11 13:09:33 +01:00
autogroup.h
sched/headers: Simplify and clean up header usage in the scheduler
2018-03-04 12:39:29 +01:00
clock.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
completion.c
completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()
2020-03-23 18:40:25 +01:00
core_sched.c
sched/core: Accounting forceidle time for all tasks except idle task
2022-01-18 12:09:59 +01:00
core.c
sched: Fix yet more sched_fork() races
2022-02-19 11:11:05 +01:00
cpuacct.c
sched/cpuacct: Make user/system times in cpuacct.stat more precise
2021-11-23 09:55:22 +01:00
cpudeadline.c
sched,rt: Use the full cpumask for balancing
2020-11-10 18:39:00 +01:00
cpudeadline.h
sched/headers: Simplify and clean up header usage in the scheduler
2018-03-04 12:39:29 +01:00
cpufreq_schedutil.c
sched/fair: Replace CFS internal cpu_util() with cpu_util_cfs()
2021-12-11 09:10:00 +01:00
cpufreq.c
cpufreq: Avoid leaving stale IRQ work items during CPU offline
2019-12-12 17:59:43 +01:00
cpupri.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
cpupri.h
sched/cpupri: Add CPUPRI_HIGHER
2020-10-29 11:00:30 +01:00
cputime.c
Peter Zijlstra says:
2022-01-11 17:14:59 -08:00
deadline.c
sched/dl: Support schedstats for deadline sched class
2021-10-05 15:51:53 +02:00
debug.c
sched/core: Forced idle accounting
2021-11-17 14:49:00 +01:00
fair.c
sched/fair: Fix all kernel-doc warnings
2022-01-18 12:09:59 +01:00
features.h
sched: Disable TTWU_QUEUE on RT
2021-10-05 15:52:12 +02:00
idle.c
sched/idle: Make the idle timer expire in hard interrupt context
2021-09-09 10:36:16 +02:00
isolation.c
sched/isolation: Reconcile rcu_nocbs= and nohz_full=
2021-05-13 14:12:47 +02:00
loadavg.c
sched: Make multiple runqueue task counters 32-bit
2021-05-12 21:34:17 +02:00
Makefile
sched, kcsan: Enable memory barrier instrumentation
2021-12-09 16:42:28 -08:00
membarrier.c
sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask
2022-01-25 22:30:25 +01:00
pelt.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
pelt.h
sched/pelt: Relax the sync of util_sum with util_avg
2022-01-18 12:09:58 +01:00
psi.c
psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
2022-01-30 09:56:58 +02:00
rt.c
sched/rt: Try to restart rt period timer when rt runtime exceeded
2021-12-07 15:14:10 +01:00
sched-pelt.h
sched/fair: Fix "runnable_avg_yN_inv" not used warnings
2019-06-17 12:15:58 +02:00
sched.h
sched/fair: Replace CFS internal cpu_util() with cpu_util_cfs()
2021-12-11 09:10:00 +01:00
smp.h
sched/headers: Split out open-coded prototypes into kernel/sched/smp.h
2020-05-28 11:03:20 +02:00
stats.c
sched: Introduce task block time in schedstats
2021-10-05 15:51:48 +02:00
stats.h
psi: Fix PSI_MEM_FULL state when tasks are in memstall and doing reclaim
2021-11-17 14:49:00 +01:00
stop_task.c
sched: Make struct sched_statistics independent of fair sched class
2021-10-05 15:51:45 +02:00
swait.c
sched/swait: Prepare usage in completions
2020-03-21 16:00:23 +01:00
topology.c
Merge branch 'akpm' (patches from Andrew)
2021-11-06 14:08:17 -07:00
wait_bit.c
sched/wait: fix ___wait_var_event(exclusive)
2019-12-17 13:32:50 +01:00
wait.c
wait: add wake_up_pollfree()
2021-12-09 10:49:56 -08:00