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linux/kernel
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Michal Koutný ab3e3b23d8 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>
2020-03-18 07:14:19 +01:00
..
bpf
bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill
2020-02-28 16:38:59 +01:00
cgroup
cgroup: Iterate tasks that did not finish do_exit()
2020-03-18 07:14:19 +01:00
configs
kconfig: tinyconfig: remove stale stack protector fixups
2018-06-15 07:15:28 +09:00
debug
kdb: do a sanity check on the cpu in kdb_per_cpu()
2020-01-27 14:50:48 +01:00
dma
dma-debug: add a schedule point in debug_dma_dump_mappings()
2020-01-04 19:12:43 +01:00
events
perf/core: Fix mlock accounting in perf_mmap()
2020-02-11 04:34:19 -08:00
gcov
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
irq
genirq/proc: Reject invalid affinity masks (again)
2020-02-28 16:38:59 +01:00
livepatch
livepatch: Nullify obj->mod in klp_module_coming()'s error path
2019-10-07 18:57:10 +02:00
locking
locking/spinlock/debug: Fix various data races
2020-01-12 12:17:05 +01:00
power
PM / hibernate: memory_bm_find_bit(): Tighten node optimisation
2020-01-09 10:18:58 +01:00
printk
printk: fix exclusive_console replaying
2020-02-11 04:33:51 -08:00
rcu
rcu: Avoid data-race in rcu_gp_fqs_check_wake()
2020-02-11 04:33:55 -08:00
sched
sched/fair: Fix O(nr_cgroups) in the load balancing path
2020-03-05 16:42:21 +01:00
time
clocksource: Prevent double add_timer_on() for watchdog_timer
2020-02-11 04:34:18 -08:00
trace
tracing: Disable trace_printk() on post poned tests
2020-03-05 16:42:18 +01:00
.gitignore
…
acct.c
acct_on(): don't mess with freeze protection
2019-05-31 06:46:05 -07:00
async.c
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-06 18:32:44 -08:00
audit_fsnotify.c
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
audit_tree.c
audit: Embed key into chunk
2019-12-13 08:51:11 +01:00
audit_watch.c
audit_get_nd(): don't unlock parent too early
2019-12-13 08:51:02 +01:00
audit.c
audit: always check the netlink payload length in audit_receive_msg()
2020-03-05 16:42:23 +01:00
audit.h
audit: track the owner of the command mutex ourselves
2018-02-23 11:22:22 -05:00
auditfilter.c
audit: fix error handling in audit_data_to_entry()
2020-03-05 16:42:17 +01:00
auditsc.c
audit: print empty EXECVE args
2019-12-01 09:17:17 +01:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-11-13 11:08:47 -08:00
capability.c
LSM: generalize flag passing to security_capable
2020-01-23 08:21:29 +01:00
compat.c
time: Enable get/put_compat_itimerspec64 always
2018-06-24 14:39:47 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/hotplug, stop_machine: Fix stop_machine vs hotplug order
2020-02-24 08:34:35 +01:00
crash_core.c
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
crash_dump.c
…
cred.c
memcg: account security cred as well to kmemcg
2020-01-09 10:19:00 +01:00
delayacct.c
delayacct: Use raw_spinlocks
2018-04-27 14:34:51 +02:00
dma.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
elfcore.c
kernel/elfcore.c: include proper prototypes
2019-10-11 18:21:23 +02:00
exec_domain.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
exit.c
exit: panic before exit_mm() on global init exit
2020-01-09 10:19:02 +01:00
extable.c
extable: Make init_kernel_text() global
2018-02-21 16:54:06 +01:00
fail_function.c
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
fork.c
fork,memcg: alloc_thread_stack_node needs to set tsk->stack
2020-01-27 14:50:58 +01:00
freezer.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
futex.c
futex: Prevent robust futex exit race
2019-12-01 09:17:38 +01:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-14 16:00:49 -08:00
hung_task.c
kernel: hung_task.c: disable on suspend
2019-04-20 09:16:02 +02:00
iomem.c
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
irq_work.c
irq_work: Do not raise an IPI when queueing work on the local CPU
2019-05-31 06:46:19 -07:00
jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
kallsyms.c
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
2019-09-21 07:17:02 +02:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
kcov.c
kernel/kcov.c: mark write_comp_data() as notrace
2019-02-12 19:47:20 +01:00
kexec_core.c
kexec: Allocate decrypted control pages for kdump if SME is enabled
2019-11-24 08:20:29 +01:00
kexec_file.c
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
kexec_internal.h
…
kexec.c
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kmod.c
…
kprobes.c
kprobes: Fix optimize_kprobe()/unoptimize_kprobe() cancellation logic
2020-03-11 14:14:47 +01:00
ksysfs.c
…
kthread.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
latencytop.c
…
Makefile
y2038: futex: Move compat implementation into futex.c
2019-12-01 09:17:38 +01:00
memremap.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-29 16:43:27 +01:00
module_signing.c
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module-internal.h
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module.c
module: avoid setting info->name early in case we can fall back to info->mod->name
2020-02-24 08:34:49 +01:00
notifier.c
…
nsproxy.c
…
padata.c
padata: fix null pointer deref of pd->pinst
2020-02-14 16:33:28 -05:00
panic.c
kernel/panic.c: do not append newline to the stack protector panic string
2019-12-01 09:17:10 +01:00
params.c
kernel/params.c: downgrade warning for unsafe parameters
2018-04-11 10:28:37 -07:00
pid_namespace.c
signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig
2019-07-26 09:14:01 +02:00
pid.c
Fix failure path in alloc_pid()
2019-01-13 09:51:06 +01:00
profile.c
…
ptrace.c
ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()
2020-01-23 08:21:29 +01:00
range.c
…
reboot.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
relay.c
relay: check return of create_buf_file() properly
2019-03-13 14:02:35 -07:00
resource.c
resource: fix locking in find_next_iomem_res()
2019-09-16 08:22:20 +02:00
rseq.c
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
seccomp.c
LSM: generalize flag passing to security_capable
2020-01-23 08:21:29 +01:00
signal.c
signal: Allow cifs and drbd to receive their terminating signals
2020-01-27 14:51:05 +01:00
smp.c
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
2019-02-12 19:47:25 +01:00
smpboot.c
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
smpboot.h
…
softirq.c
nohz: Fix missing tick reprogram when interrupting an inline softirq
2018-08-03 15:52:10 +02:00
stacktrace.c
…
stop_machine.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
sys_ni.c
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
sys.c
kernel/sys.c: prctl: fix false positive in validate_prctl_map()
2019-06-15 11:54:01 +02:00
sysctl_binary.c
staging: irda: remove remaining remants of irda code removal
2018-04-16 11:26:49 +02:00
sysctl.c
kernel: sysctl: make drop_caches write-only
2020-01-04 19:13:17 +01:00
task_work.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-17 13:57:15 +01:00
taskstats.c
taskstats: fix data-race
2020-01-09 10:18:59 +01:00
test_kprobes.c
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture.c
torture: Keep old-school dmesg format
2018-06-25 11:30:10 -07:00
tracepoint.c
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
tsacct.c
…
ucount.c
headers: untangle kmemleak.h from mm.h
2018-04-05 21:36:27 -07:00
uid16.c
fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers
2018-04-02 20:15:59 +02:00
uid16.h
kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c
2018-04-02 20:15:30 +02:00
umh.c
umh: fix race condition
2018-06-07 16:56:28 -04:00
up.c
…
user_namespace.c
userns: also map extents in the reverse map to kernel IDs
2018-11-13 11:09:00 -08:00
user-return-notifier.c
…
user.c
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
utsname.c
uts: create "struct uts_namespace" from kmem_cache
2018-04-11 10:28:35 -07:00
watchdog_hld.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog.c
watchdog/softlockup: Enforce that timestamp is valid on boot
2020-02-24 08:34:49 +01:00
workqueue_internal.h
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
workqueue.c
workqueue: Fix missing kfree(rescuer) in destroy_workqueue()
2019-12-17 20:35:50 +01:00