Michal Koutný 1c790191ca 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 23:05:37 +02:00
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Makefile	cgroup: Add misc cgroup controller	2021-04-04 13:34:46 -04:00
cgroup-internal.h	memcg: fix possible use-after-free in memcg_write_event_control()	2022-12-14 11:37:19 +01:00
cgroup-v1.c	cgroup: Remove duplicates in cgroup v1 tasks file	2023-10-19 23:05:37 +02:00
cgroup.c	sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets	2023-08-30 16:18:20 +02:00
cpuset.c	cgroup/cpuset: Free DL BW in case can_attach() fails	2023-08-30 16:18:20 +02:00
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	2019-11-07 07:38:41 -08:00
legacy_freezer.c	cgroup: rename freezer.c into legacy_freezer.c	2019-04-19 11:26:48 -07:00
misc.c	svm/sev: Register SEV and SEV-ES ASIDs to the misc controller	2021-04-04 13:34:46 -04:00
namespace.c	cgroup:namespace: Remove unused cgroup_namespaces_init()	2023-09-19 12:22:47 +02:00
pids.c	clone3: allow spawning processes into cgroups	2020-02-12 17:57:51 -05:00
rdma.c	cgroup: fix spelling mistakes	2021-05-24 12:45:26 -04:00
rstat.c	cgroup: Fix rootcg cpu.stat guest double counting	2021-11-18 19:16:45 +01:00