proc: hide kernel addresses via %pK in /proc/<pid>/stack
This file is readable for the task owner. Hide kernel addresses from unprivileged users, leave them function names and offsets. Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Acked-by: Kees Cook <kees.cook@canonical.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -340,7 +340,7 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
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save_stack_trace_tsk(task, &trace);
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for (i = 0; i < trace.nr_entries; i++) {
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seq_printf(m, "[<%p>] %pS\n",
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seq_printf(m, "[<%pK>] %pS\n",
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(void *)entries[i], (void *)entries[i]);
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}
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kfree(entries);
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