Michal Koutný 713f26696c cgroup: Iterate tasks that did not finish do_exit() ...

commit 9c974c7724 upstream.

PF_EXITING is set earlier than actual removal from css_set when a task
is exitting. This can confuse cgroup.procs readers who see no PF_EXITING
tasks, however, rmdir is checking against css_set membership so it can
transitionally fail with EBUSY.

Fix this by listing tasks that weren't unlinked from css_set active
lists.
It may happen that other users of the task iterator (without
CSS_TASK_ITER_PROCS) spot a PF_EXITING task before cgroup_exit(). This
is equal to the state before commit c03cd7738a ("cgroup: Include dying
leaders with live threads in PROCS iterations") but it may be reviewed
later.

Reported-by: Suren Baghdasaryan <surenb@google.com>
Fixes: c03cd7738a ("cgroup: Include dying leaders with live threads in PROCS iterations")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-03-20 10:54:14 +01:00

..

bpf

bpf: Fix passing modified ctx to ld/abs/ind instruction

2020-01-12 12:12:02 +01:00

cgroup

cgroup: Iterate tasks that did not finish do_exit()

2020-03-20 10:54:14 +01:00

configs

…

debug

kdb: do a sanity check on the cpu in kdb_per_cpu()

2020-01-27 14:46:34 +01:00

events

perf/core: Fix mlock accounting in perf_mmap()

2020-02-14 16:32:20 -05:00

gcov

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irq

genirq/proc: Reject invalid affinity masks (again)

2020-02-28 16:36:15 +01:00

livepatch

livepatch: Nullify obj->mod in klp_module_coming()'s error path

2019-10-07 18:55:09 +02:00

locking

locking/spinlock/debug: Fix various data races

2020-01-12 12:11:49 +01:00

power

PM / hibernate: memory_bm_find_bit(): Tighten node optimisation

2020-01-09 10:17:53 +01:00

printk

printk: fix integer overflow in setup_log_buf()

2019-12-01 09:13:17 +01:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:47:33 -07:00

sched

sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision

2019-12-17 20:38:43 +01:00

time

clocksource: Prevent double add_timer_on() for watchdog_timer

2020-02-14 16:32:20 -05:00

trace

tracing: Disable trace_printk() on post poned tests

2020-03-11 18:02:50 +01:00

.gitignore

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acct.c

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async.c

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audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit_get_nd(): don't unlock parent too early

2019-12-17 20:37:27 +01:00

audit.c

audit: always check the netlink payload length in audit_receive_msg()

2020-03-11 18:02:55 +01:00

audit.h

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auditfilter.c

audit: fix error handling in audit_data_to_entry()

2020-03-11 18:02:48 +01:00

auditsc.c

audit: print empty EXECVE args

2019-12-01 09:14:03 +01:00

backtracetest.c

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bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:15:08 -08:00

capability.c

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compat.c

compat: fix 4-byte infoleak via uninitialized struct field

2018-05-16 10:10:26 +02:00

configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

cpu/hotplug, stop_machine: Fix stop_machine vs hotplug order

2020-02-28 16:35:55 +01:00

crash_core.c

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crash_dump.c

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cred.c

memcg: account security cred as well to kmemcg

2020-01-09 10:17:54 +01:00

delayacct.c

delayacct: Use raw_spinlocks

2018-08-03 07:50:38 +02:00

dma.c

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elfcore.c

kernel/elfcore.c: include proper prototypes

2019-10-11 18:18:42 +02:00

exec_domain.c

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exit.c

exit: panic before exit_mm() on global init exit

2020-01-09 10:17:56 +01:00

extable.c

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fork.c

futex: Split futex_mm_release() for exit/exec

2019-12-05 15:38:26 +01:00

freezer.c

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futex.c

futex: Prevent exit livelock

2019-12-05 15:38:28 +01:00

groups.c

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hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:15:05 +02:00

irq_work.c

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jump_label.c

sched/core: Fix cpu.max vs. cpuhotplug deadlock

2018-12-05 19:41:17 +01:00

kallsyms.c

kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol

2019-09-21 07:15:38 +02:00

kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:50:22 +02:00

kexec_core.c

kexec: Allocate decrypted control pages for kdump if SME is enabled

2019-11-24 08:23:15 +01:00

kexec_file.c

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kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobes: Fix optimize_kprobe()/unoptimize_kprobe() cancellation logic

2020-03-11 18:02:57 +01:00

ksysfs.c

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kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:50:21 +02:00

latencytop.c

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Makefile

y2038: futex: Move compat implementation into futex.c

2019-12-05 15:38:22 +01:00

memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:01:02 +01:00

module_signing.c

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module-internal.h

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module.c

kernel/module: Fix memleak in module_add_modinfo_attrs()

2020-02-14 16:32:06 -05:00

notifier.c

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nsproxy.c

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padata.c

padata: Remove broken queue flushing

2020-02-28 16:35:53 +01:00

panic.c

panic: ensure preemption is disabled during panic()

2019-10-17 13:43:19 -07:00

params.c

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pid_namespace.c

signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig

2019-07-31 07:28:21 +02:00

pid.c

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profile.c

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ptrace.c

ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()

2020-01-23 08:20:32 +01:00

range.c

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reboot.c

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relay.c

relay: check return of create_buf_file() properly

2019-03-13 14:03:20 -07:00

resource.c

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seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 18:54:04 +02:00

signal.c

signal: Allow cifs and drbd to receive their terminating signals

2020-01-27 14:46:43 +01:00

smp.c

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:46:13 +01:00

smpboot.c

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smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:12:47 +02:00

stacktrace.c

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stop_machine.c

stop_machine: Atomically queue and wake stopper threads

2018-09-05 09:26:36 +02:00

sys_ni.c

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sys.c

kernel/sys.c: prctl: fix false positive in validate_prctl_map()

2019-06-15 11:54:52 +02:00

sysctl_binary.c

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sysctl.c

kernel: sysctl: make drop_caches write-only

2020-01-04 13:59:57 +01:00

task_work.c

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taskstats.c

taskstats: fix data-race

2020-01-09 10:17:53 +01:00

test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:51:50 +02:00

tsacct.c

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ucount.c

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uid16.c

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umh.c

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up.c

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user_namespace.c

userns: move user access out of the mutex

2018-09-09 19:56:00 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

utsname.c

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watchdog_hld.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00

watchdog.c

watchdog/softlockup: Enforce that timestamp is valid on boot

2020-02-28 16:36:05 +01:00

workqueue_internal.h

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workqueue.c

workqueue: Fix missing kfree(rescuer) in destroy_workqueue()

2019-12-17 20:39:59 +01:00