Peter Zijlstra b1e8206582 sched: Fix yet more sched_fork() races ...

Where commit 4ef0c5c6b5 ("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 13765de814 ("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: 4ef0c5c6b5 ("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

…

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

…

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

Merge tag 'sched_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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