linux-kernel - [GIT PULL] cgroup fixes for v4.4-rc4

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20151208165053.GG30240@mtj.duckdns.org>
Date:	Tue, 8 Dec 2015 11:50:53 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>, cgroups@...r.kernel.org,
	Oleg Nesterov <oleg@...hat.com>
Subject: [GIT PULL] cgroup fixes for v4.4-rc4

Hello, Linus.

More change than I'd have liked at this stage.  The pids controller
and the changes made to cgroup core to support it introduced and
revealed several important issues.

* Assigning membership to a newly created task and migrating it can
  race leading to incorrect accounting.  Oleg fixed it by widening
  threadgroup synchronization.  It looks like we'll be able to merge
  it with a different percpu rwsem which is used in fork path making
  things simpler and cheaper.

* The recent change to extend cgroup membership to zombies (so that
  pid accounting can extend till the pid is actually released) missed
  pinning the underlying data structures leading to use-after-free.
  Fixed.

* v2 hierarchy was calling subsystem callbacks with the wrong target
  cgroup_subsys_state based on the incorrect assumption that they
  share the same target.  pids is the first controller affected by
  this.  Subsys callbacks updated so that they can deal with
  multi-target migrations.

Thanks.

The following changes since commit 527e9316f8ec44bd53d90fb9f611fa7ffff52bb9:

  Linux 4.4-rc4 (2015-12-06 15:43:12 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-4.4-fixes

for you to fetch changes up to 0b98f0c04245877ae0b625a7f0aa55b8ff98e0c4:

  Merge branch 'master' into for-4.4-fixes (2015-12-07 10:09:03 -0500)

----------------------------------------------------------------
Oleg Nesterov (2):
      cgroup: pids: fix race between cgroup_post_fork() and cgroup_migrate()
      cgroup: pids: kill pids_fork(), simplify pids_can_fork() and pids_cancel_fork()

Tejun Heo (6):
      cgroup: fix cftype->file_offset handling
      cgroup: make css_set pin its css's to avoid use-afer-free
      cgroup_freezer: simplify propagation of CGROUP_FROZEN clearing in freezer_attach()
      cgroup: fix handling of multi-destination migration from subtree_control enabling
      cgroup_pids: don't account for the root cgroup
      Merge branch 'master' into for-4.4-fixes

 block/blk-cgroup.c           |  6 +--
 include/linux/cgroup-defs.h  | 13 ++----
 include/linux/cgroup.h       | 47 ++++++++++-----------
 kernel/cgroup.c              | 99 ++++++++++++++++++++++++++++++++++----------
 kernel/cgroup_freezer.c      | 23 +++++-----
 kernel/cgroup_pids.c         | 77 +++++++++-------------------------
 kernel/cpuset.c              | 33 +++++++++------
 kernel/events/core.c         |  6 +--
 kernel/fork.c                |  9 ++--
 kernel/sched/core.c          | 12 +++---
 mm/memcontrol.c              | 45 ++++++++++----------
 net/core/netclassid_cgroup.c |  6 ++-
 net/core/netprio_cgroup.c    |  9 ++--
 13 files changed, 202 insertions(+), 183 deletions(-)

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/