shmem: handle some malloc failures

Reported by Intel from the output of klocwork.

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

hwloc/shmem.c

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2017-2018 Inria.  All rights reserved.
+ * Copyright © 2017-2019 Inria.  All rights reserved.
  * See COPYING in top-level directory.
  */
 
@@ -214,6 +214,8 @@ hwloc_shmem_topology_adopt(hwloc_topology_t *topologyp,
   new->support.discovery = malloc(sizeof(*new->support.discovery));
   new->support.cpubind = malloc(sizeof(*new->support.cpubind));
   new->support.membind = malloc(sizeof(*new->support.membind));
+  if (!new->support.discovery || !new->support.cpubind || !new->support.membind)
+    goto out_with_support;
   memcpy(new->support.discovery, old->support.discovery, sizeof(*new->support.discovery));
   memcpy(new->support.cpubind, old->support.cpubind, sizeof(*new->support.cpubind));
   memcpy(new->support.membind, old->support.membind, sizeof(*new->support.membind));
@@ -230,6 +232,11 @@ hwloc_shmem_topology_adopt(hwloc_topology_t *topologyp,
   *topologyp = new;
   return 0;
 
+ out_with_support:
+  free(new->support.discovery);
+  free(new->support.cpubind);
+  free(new->support.membind);
+  free(new);
  out_with_components:
   hwloc_components_fini();
  out_with_mmap: