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cgroups: censor kernel pointer in debug files
As found in grsecurity, this avoids exposing a kernel pointer through the cgroup debug entries. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -1329,7 +1329,7 @@ static int cgroup_css_links_read(struct seq_file *seq, void *v)
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struct task_struct *task;
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int count = 0;
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seq_printf(seq, "css_set %p\n", cset);
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seq_printf(seq, "css_set %pK\n", cset);
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list_for_each_entry(task, &cset->tasks, cg_list) {
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if (count++ > MAX_TASKS_SHOWN_PER_CSS)
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