use task_lock() protect tsk->cgroups and get_css_set(tsk->cgroups) Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx> --- 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 */ _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
