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    SubjectRe: [PATCH 41/50] sched: numa: Use {cpu, pid} to create task groups for shared faults
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    Hello Mel

    On Tue, Sep 10, 2013 at 5:32 PM, Mel Gorman <mgorman@suse.de> wrote:
    >
    > +void task_numa_free(struct task_struct *p)
    > +{
    > + struct numa_group *grp = p->numa_group;
    > + int i;
    > +
    > + kfree(p->numa_faults);
    > +
    > + if (grp) {
    > + for (i = 0; i < 2*nr_node_ids; i++)
    > + atomic_long_sub(p->numa_faults[i], &grp->faults[i]);
    > +
    use after free, numa_faults ;/

    > + spin_lock(&grp->lock);
    > + list_del(&p->numa_entry);
    > + grp->nr_tasks--;
    > + spin_unlock(&grp->lock);
    > + rcu_assign_pointer(p->numa_group, NULL);
    > + put_numa_group(grp);
    > + }
    > +}
    > +


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