[PATCH 4.4 016/190] pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Kirill Tkhai [ Upstream commit 8896c23d2ef803f1883fea73117a435925c2b4c4 ] alloc_pidmap() advances pid_namespace::last_pid. When first pid allocation fails, then next

[PATCH 4.4 016/190] pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Kirill Tkhai [ Upstream commit 8896c23d2ef803f1883fea73117a435925c2b4c4 ] alloc_pidmap() advances pid_namespace::last_pid. When first pid allocation fails, then next created process will