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| author |   Waiman Long <longman@redhat.com> | 2017-05-15 09:34:06 -0400 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2017-05-17 16:58:32 -0400 |
| commit | 33c35aa4817864e056fd772230b0c6b552e36ea2 (patch) | |
| tree | c5eea540e4e818e11aa809d7652cface407203e7 /include/linux/cgroup-defs.h | |
| parent | Linux 4.12-rc1 (diff) | |
| download | wireguard-linux-33c35aa4817864e056fd772230b0c6b552e36ea2.tar.xz wireguard-linux-33c35aa4817864e056fd772230b0c6b552e36ea2.zip | |
cgroup: Prevent kill_css() from being called more than once
The kill_css() function may be called more than once under the condition
that the css was killed but not physically removed yet followed by the
removal of the cgroup that is hosting the css. This patch prevents any
harmm from being done when that happens.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v4.5+
Diffstat (limited to 'include/linux/cgroup-defs.h')
| -rw-r--r-- | include/linux/cgroup-defs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 21745946cae1..ec47101cb1bf 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -48,6 +48,7 @@ enum { CSS_ONLINE = (1 << 1), /* between ->css_online() and ->css_offline() */ CSS_RELEASED = (1 << 2), /* refcnt reached zero, released */ CSS_VISIBLE = (1 << 3), /* css is visible to userland */ + CSS_DYING = (1 << 4), /* css is dying */ }; /* bits in struct cgroup flags field */ |