Peter Zijlstra 3411613611 sched: Fix yet more sched_fork() races ... commit b1e8206582 upstream. 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 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-03-08 19:12:49 +01:00
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autogroup.h	…
clock.h	…
coredump.h	mm: gup: pack has_pinned in MMF_HAS_PINNED	2021-06-29 10:53:48 -07:00
cpufreq.h	sched/cpufreq: Consider reduced CPU capacity in energy calculation	2021-06-17 14:11:43 +02:00
cputime.h	…
deadline.h	…
debug.h	sched: Change task_struct::state	2021-06-18 11:43:09 +02:00
hotplug.h	…
idle.h	…
init.h	…
isolation.h	…
jobctl.h	…
loadavg.h	…
mm.h	memcg: replace in_interrupt() by !in_task() in active_memcg()	2021-09-03 09:58:13 -07:00
nohz.h	…
numa_balancing.h	…
prio.h	…
rt.h	…
sd_flags.h	sched/core: Introduce SD_ASYM_CPUCAPACITY_FULL sched_domain flag	2021-06-24 09:07:50 +02:00
signal.h	signal: Replace force_fatal_sig with force_exit_sig when in doubt	2021-11-25 09:49:07 +01:00
smt.h	…
stat.h	sched: Make nr_iowait_cpu() return 32-bit value	2021-05-12 21:34:16 +02:00
sysctl.h	sched/sysctl: Move extern sysctl declarations to sched.h	2021-06-28 15:42:25 +02:00
task.h	sched: Fix yet more sched_fork() races	2022-03-08 19:12:49 +01:00
task_stack.h	task_stack: Fix end_of_stack() for architectures with upwards-growing stack	2021-11-18 19:16:21 +01:00
topology.h	…
types.h	…
user.h	fs/epoll: use a per-cpu counter for user's watches count	2021-09-08 11:50:27 -07:00
wake_q.h	sched/wake_q: Provide WAKE_Q_HEAD_INITIALIZER()	2021-08-17 16:57:55 +02:00
xacct.h	…