[PATCH] proc: show personality via /proc/pid/personality
Make process personality flags visible in /proc. Since a process's personality is potentially sensitive (e.g. READ_IMPLIES_EXEC), make this file only readable by the process owner. Signed-off-by: Kees Cook <kees.cook@canonical.com> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
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@ -2438,6 +2438,13 @@ static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
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}
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#endif /* CONFIG_TASK_IO_ACCOUNTING */
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static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task)
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{
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seq_printf(m, "%08x\n", task->personality);
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return 0;
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}
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/*
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* Thread groups
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*/
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@ -2454,6 +2461,7 @@ static const struct pid_entry tgid_base_stuff[] = {
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REG("environ", S_IRUSR, environ),
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INF("auxv", S_IRUSR, pid_auxv),
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ONE("status", S_IRUGO, pid_status),
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ONE("personality", S_IRUSR, pid_personality),
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INF("limits", S_IRUSR, pid_limits),
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#ifdef CONFIG_SCHED_DEBUG
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REG("sched", S_IRUGO|S_IWUSR, pid_sched),
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@ -2789,6 +2797,7 @@ static const struct pid_entry tid_base_stuff[] = {
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REG("environ", S_IRUSR, environ),
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INF("auxv", S_IRUSR, pid_auxv),
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ONE("status", S_IRUGO, pid_status),
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ONE("personality", S_IRUSR, pid_personality),
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INF("limits", S_IRUSR, pid_limits),
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#ifdef CONFIG_SCHED_DEBUG
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REG("sched", S_IRUGO|S_IWUSR, pid_sched),
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