Michal Koutný 72655d8426 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 07:17:48 +01:00
..
Makefile	cgroup: cgroup v2 freezer	2019-04-19 11:26:48 -07:00
cgroup-internal.h	cgroup: make TRACE_CGROUP_PATH irq-safe	2019-04-19 11:26:49 -07:00
cgroup-v1.c	Use kvmalloc in cgroups-v1	2019-08-07 11:37:58 -07:00
cgroup.c	cgroup: Iterate tasks that did not finish do_exit()	2020-03-18 07:17:48 +01:00
cpuset.c	sched/topology: Don't try to build empty sched domains	2019-10-29 09:58:45 +01:00
debug.c	kernel: cgroup: fix misuse of %x	2019-05-06 08:47:48 -07:00
freezer.c	cgroup: freezer: don't change task and cgroups status unnecessarily	2019-12-31 16:45:06 +01:00
legacy_freezer.c	cgroup: rename freezer.c into legacy_freezer.c	2019-04-19 11:26:48 -07:00
namespace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
pids.c	cgroup: pids: use atomic64_t for pids->limit	2019-12-17 19:56:15 +01:00
rdma.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 451	2019-06-19 17:09:08 +02:00
rstat.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00