Michal Koutný cb8f1dd1b7 cgroup: Remove duplicates in cgroup v1 tasks file ... commit 1ca0b60515 upstream. One PID may appear multiple times in a preloaded pidlist. (Possibly due to PID recycling but we have reports of the same task_struct appearing with different PIDs, thus possibly involving transfer of PID via de_thread().) Because v1 seq_file iterator uses PIDs as position, it leads to a message: > seq_file: buggy .next function kernfs_seq_next did not update position index Conservative and quick fix consists of removing duplicates from `tasks` file (as opposed to removing pidlists altogether). It doesn't affect correctness (it's sufficient to show a PID once), performance impact would be hidden by unconditional sorting of the pidlist already in place (asymptotically). Link: https://lore.kernel.org/r/20230823174804.23632-1-mkoutny@suse.com/ Suggested-by: Firo Yang <firo.yang@suse.com> Signed-off-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-10-19 23:08:57 +02:00
..
Makefile	…
cgroup-internal.h	…
cgroup-v1.c	cgroup: Remove duplicates in cgroup v1 tasks file	2023-10-19 23:08:57 +02:00
cgroup.c	sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets	2023-08-30 16:11:10 +02:00
cpuset.c	cgroup/cpuset: Inherit parent's load balance state in v2	2023-09-13 09:42:49 +02:00
debug.c	…
freezer.c	…
legacy_freezer.c	cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex in freezer_css_{online,offline}()	2023-06-28 11:12:25 +02:00
misc.c	…
namespace.c	cgroup:namespace: Remove unused cgroup_namespaces_init()	2023-09-13 09:42:56 +02:00
pids.c	…
rdma.c	…
rstat.c	…