Michal Koutný 2a4a828040 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>		2023-10-25 11:54:16 +02:00
..
cgroup-internal.h	memcg: fix possible use-after-free in memcg_write_event_control()	2022-12-14 11:31:57 +01:00
cgroup-v1.c	cgroup: Remove duplicates in cgroup v1 tasks file	2023-10-25 11:54:16 +02:00
cgroup.c	sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets	2023-08-30 16:23:17 +02:00
cpuset.c	cgroup/cpuset: Free DL BW in case can_attach() fails	2023-08-30 16:23:18 +02:00
debug.c
freezer.c	cgroup: freezer: don't change task and cgroups status unnecessarily	2019-11-07 07:38:41 -08:00
legacy_freezer.c
Makefile
namespace.c	cgroup:namespace: Remove unused cgroup_namespaces_init()	2023-09-19 12:20:19 +02:00
pids.c	clone3: allow spawning processes into cgroups	2020-02-12 17:57:51 -05:00
rdma.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 451	2019-06-19 17:09:08 +02:00
rstat.c	cgroup: Fix rootcg cpu.stat guest double counting	2021-11-18 14:04:13 +01:00