Tejun Heo cd6aab7367 sched_ext: Close sub-sched init race with post-init DEAD recheck ... scx_sub_enable_workfn()'s init pass and scx_sub_disable() migration both drop the rq lock to call __scx_init_task() against the other sched. A TASK_DEAD @p can fall through sched_ext_dead() in that window. sched_ext_dead() runs ops.exit_task() on the sched @p was attached to, not on the sched whose init just completed, so the new allocation leaks. Reuse the DEAD signal set by sched_ext_dead(). After __scx_init_task() returns, take task_rq_lock(p) and check for DEAD; on hit, call scx_sub_init_cancel_task() against the sub sched the init ran for and drop @p; on miss, proceed as before. Reported-by: zhidao su <suzhidao@xiaomi.com> Link: https://lore.kernel.org/all/20260429133155.3825247-1-suzhidao@xiaomi.com/ Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrea Righi <arighi@nvidia.com>		2026-05-10 10:08:16 -10:00
..
autogroup.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
autogroup.h
build_policy.c	sched_ext: Move internal type and accessor definitions to ext_internal.h	2025-09-03 11:33:28 -10:00
build_utility.c
clock.c	sched/clock: Avoid false sharing for sched_clock_irqtime	2026-02-03 12:04:19 +01:00
completion.c
core_sched.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
core.c	Runtime Verification updates for 7.1:	2026-04-15 17:15:18 -07:00
cpuacct.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
cpudeadline.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
cpudeadline.h	sched/deadline: only set free_cpus for online runqueues	2025-10-16 11:13:49 +02:00
cpufreq_schedutil.c	cpufreq: Pass the policy to cpufreq_driver->adjust_perf()	2026-04-02 11:30:24 -05:00
cpufreq.c
cpupri.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
cpupri.h
cputime.c	- A nice cleanup to the paravirt code containing a unification of the paravirt	2026-02-10 19:01:45 -08:00
deadline.c	Runtime Verification updates for 7.1:	2026-04-15 17:15:18 -07:00
debug.c	Merge branch 'sched/urgent' into sched/core, to resolve conflicts	2026-04-02 15:04:09 +02:00
ext_idle.c	sched_ext: idle: Recheck prev_cpu after narrowing allowed mask	2026-05-04 11:01:04 -10:00
ext_idle.h	sched_ext: Deny SCX kfuncs to non-SCX struct_ops programs	2026-04-20 07:57:29 -10:00
ext_internal.h	sched_ext: Make bypass LB cpumasks per-scheduler	2026-04-24 14:31:36 -10:00
ext.c	sched_ext: Close sub-sched init race with post-init DEAD recheck	2026-05-10 10:08:16 -10:00
ext.h	sched_ext: Add @kargs to scx_fork()	2026-03-06 07:58:02 -10:00
fair.c	Scheduler changes for v7.1:	2026-04-14 13:33:36 -07:00
features.h	Scheduler changes for v7.1:	2026-04-14 13:33:36 -07:00
idle.c	sched: idle: Consolidate the handling of two special cases	2026-03-16 20:29:47 +01:00
isolation.c	cgroup/cpuset: Call housekeeping_update() without holding cpus_read_lock	2026-02-23 10:46:49 -10:00
loadavg.c	Merge branch 'tip/sched/urgent'	2025-07-14 17:16:28 +02:00
Makefile	sched: Enable context analysis for core.c and fair.c	2026-01-05 16:43:36 +01:00
membarrier.c	rseq: Simplify the event notification	2025-11-04 08:30:09 +01:00
pelt.c	treewide: Update email address	2026-01-11 06:09:11 -10:00
pelt.h	sched/fair: Switch to task based throttle model	2025-09-03 10:03:14 +02:00
psi.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
rq-offsets.c	sched: Make migrate_{en,dis}able() inline	2025-09-25 09:57:16 +02:00
rt.c	sched/rt: Cleanup global RT bandwidth functions	2026-04-08 13:11:44 +02:00
sched-pelt.h
sched.h	sched_ext: Changes for v7.1	2026-04-15 10:54:24 -07:00
smp.h
stats.c	sched/smp: Use the SMP version of schedstats	2025-06-13 08:47:21 +02:00
stats.h	delayacct: add timestamp of delay max	2026-01-31 16:16:06 -08:00
stop_task.c	sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*()	2025-12-17 10:53:25 +01:00
swait.c
syscalls.c	Linux 7.0-rc4	2026-03-17 07:14:42 +01:00
topology.c	sched/fair: Use sched_energy_enabled()	2026-04-03 14:23:41 +02:00
wait_bit.c
wait.c	ARM:	2025-07-30 17:14:01 -07:00