Messages in this thread Patch in this message | | | Date | Fri, 21 Nov 2008 16:49:55 +0800 | From | Lai Jiangshan <> | Subject | [PATCH] cgroups: use task_lock() for access tsk->cgroups safe in cgroup_clone() |
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use task_lock() protect tsk->cgroups and get_css_set(tsk->cgroups)
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> --- diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 358e775..ddc10ac 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2933,6 +2943,7 @@ 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); @@ -2941,6 +2952,7 @@ 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 */
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