releases/4.9.30/of-fix-cpus-reference-leak-in-of_numa_parse_cpu_nodes.patch

   1 From b8475cbee5ab2eac05f9cd5dbcc94c453d3cbf10 Mon Sep 17 00:00:00 2001
   2 From: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
   3 Date: Mon, 17 Apr 2017 20:29:17 -0400
   4 Subject: of: fix "/cpus" reference leak in of_numa_parse_cpu_nodes()
   5
   6 From: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
   7
   8 commit b8475cbee5ab2eac05f9cd5dbcc94c453d3cbf10 upstream.
   9
  10 The call to of_find_node_by_path("/cpus") returns the cpus device_node
  11 with its reference count incremented. There is no matching of_node_put()
  12 call in of_numa_parse_cpu_nodes() which results in a leaked reference
  13 to the "/cpus" node.
  14
  15 This patch adds an of_node_put() to release the reference.
  16
  17 fixes: 298535c00a2c ("of, numa: Add NUMA of binding implementation.")
  18 Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
  19 Acked-by: David Daney <david.daney@cavium.com>
  20 Signed-off-by: Rob Herring <robh@kernel.org>
  21 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  22
  23 ---
  24  drivers/of/of_numa.c |    2 ++
  25  1 file changed, 2 insertions(+)
  26
  27 --- a/drivers/of/of_numa.c
  28 +++ b/drivers/of/of_numa.c
  29 @@ -57,6 +57,8 @@ static void __init of_numa_parse_cpu_nod
  30                 else
  31                         node_set(nid, numa_nodes_parsed);
  32         }
  33 +
  34 +       of_node_put(cpus);
  35  }
  36
  37  static int __init of_numa_parse_memory_nodes(void)