1 files changed, 18 insertions, 1 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 40701538fbd1..e7006eb6c1e4 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -444,6 +444,15 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
                         magic2 != LINUX_REBOOT_MAGIC2C))
                 return -EINVAL;
 
+        /*
+         * If pid namespaces are enabled and the current task is in a child
+         * pid_namespace, the command is handled by reboot_pid_ns() which will
+         * call do_exit().
+         */
+        ret = reboot_pid_ns(task_active_pid_ns(current), cmd);
+        if (ret)
+                return ret;
+
         /* Instead of trying to make the power_off code look like
          * halt when pm_power_off is not set do it the easy way.
          */
@@ -1706,7 +1715,7 @@ static int prctl_set_mm(int opt, unsigned long addr,
         if (arg4 | arg5)
                 return -EINVAL;
 
-        if (!capable(CAP_SYS_ADMIN))
+        if (!capable(CAP_SYS_RESOURCE))
                 return -EPERM;
 
         if (addr >= TASK_SIZE)
@@ -1962,6 +1971,14 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                 case PR_SET_MM:
                         error = prctl_set_mm(arg2, arg3, arg4, arg5);
                         break;
+                case PR_SET_CHILD_SUBREAPER:
+                        me->signal->is_child_subreaper = !!arg2;
+                        error = 0;
+                        break;
+                case PR_GET_CHILD_SUBREAPER:
+                        error = put_user(me->signal->is_child_subreaper,
+                                         (int __user *) arg2);
+                        break;
                 default:
                         error = -EINVAL;
                         break;