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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2009-01-07 18:07:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-08 08:31:02 -0800 |
| commit | 104cbd55377029e70fc2cee01089e84b9c36e5dc (patch) | |
| tree | 60c7d0d9625b74f6a2733a9618cc97dc772848f5 | |
| parent | b2aa30f7bb381e04c93eed106089ba55553955f1 (diff) | |
| download | linux-104cbd55377029e70fc2cee01089e84b9c36e5dc.tar.gz linux-104cbd55377029e70fc2cee01089e84b9c36e5dc.tar.bz2 linux-104cbd55377029e70fc2cee01089e84b9c36e5dc.zip | |
cgroups: use task_lock() for access tsk->cgroups safe in cgroup_clone()
Use task_lock() protect tsk->cgroups and get_css_set(tsk->cgroups).
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/cgroup.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index a288da176e46..00d5136d38c2 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2903,6 +2903,7 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys, mutex_unlock(&cgroup_mutex); return 0; } + task_lock(tsk); cg = tsk->cgroups; parent = task_cgroup(tsk, subsys->subsys_id); @@ -2915,6 +2916,7 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys, /* Keep the cgroup alive */ get_css_set(cg); + task_unlock(tsk); mutex_unlock(&cgroup_mutex); /* Now do the VFS work to create a cgroup */ |