[PATCH v3] bsps/shared/ofw: Fix coverity reported defects

[G S Niteesh Babu]

Fixed use after free and null pointer dereference defects

FIXES:
1) CID 1472601 (NULL_RETURNS)
2) CID 1472600 (USE_AFTER_FREE)
3) CID 1472599 (USE_AFTER_FREE)
4) CID 1472598 (USE_AFTER_FREE)
5) CID 1472596 (USE_AFTER_FREE)
6) CID 1472597 (ARRAY_VS_SINGLETON)
7) CID 1472595 (ARRAY_VS_SINGLETON)
---
 bsps/shared/ofw/ofw.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/bsps/shared/ofw/ofw.c b/bsps/shared/ofw/ofw.c
index 82924b2600..ccd57e36af 100644
--- a/bsps/shared/ofw/ofw.c
+++ b/bsps/shared/ofw/ofw.c
@@ -313,7 +313,7 @@ ssize_t rtems_ofw_get_prop_alloc(
     }
 
     if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) {
-      rtems_ofw_free(buf);
+      rtems_ofw_free(*buf);
       *buf = NULL;
       return -1;
     }
@@ -344,7 +344,7 @@ ssize_t rtems_ofw_get_prop_alloc_multi(
     }
 
     if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) {
-      rtems_ofw_free(buf);
+      rtems_ofw_free(*buf);
       *buf = NULL;
       return -1;
     }
@@ -373,7 +373,7 @@ ssize_t rtems_ofw_get_enc_prop_alloc(
     }
 
     if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) {
-      rtems_ofw_free(buf);
+      rtems_ofw_free(*buf);
       *buf = NULL;
       return -1;
     }
@@ -404,7 +404,7 @@ ssize_t rtems_ofw_get_enc_prop_alloc_multi(
     }
 
     if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) {
-      rtems_ofw_free(buf);
+      rtems_ofw_free(*buf);
       *buf = NULL;
       return -1;
     }
@@ -500,21 +500,21 @@ static phandle_t rtems_ofw_get_effective_phandle(
 )
 {
   phandle_t child;
-  phandle_t ref;
+  phandle_t ref[1];
 
   for (child = rtems_ofw_child(node); child != 0; child = rtems_ofw_peer(child)) {
-    ref = rtems_ofw_get_effective_phandle(child, xref);
-    if (ref != -1)
-      return ref;
+    ref[0] = rtems_ofw_get_effective_phandle(child, xref);
+    if (ref[0] != -1)
+      return ref[0];
 
-    if (rtems_ofw_get_enc_prop(child, "phandle", &ref, sizeof(ref)) == -1 &&
-        rtems_ofw_get_enc_prop(child, "ibm,phandle", &ref, sizeof(ref)) == -1 &&
-        rtems_ofw_get_enc_prop(child, "linux,phandle", &ref, sizeof(ref)) == -1
+    if (rtems_ofw_get_enc_prop(child, "phandle", ref, sizeof(ref)) == -1 &&
+        rtems_ofw_get_enc_prop(child, "ibm,phandle", ref, sizeof(ref)) == -1 &&
+        rtems_ofw_get_enc_prop(child, "linux,phandle", ref, sizeof(ref)) == -1
     ) {
       continue;
     }
 
-    if (ref == xref)
+    if (ref[0] == xref)
       return child;
   }
 
@@ -533,16 +533,16 @@ phandle_t rtems_ofw_node_from_xref( phandle_t xref )
 
 phandle_t rtems_ofw_xref_from_node( phandle_t node )
 {
-  phandle_t ref;
+  phandle_t ref[1];
 
-    if (rtems_ofw_get_enc_prop(node, "phandle", &ref, sizeof(ref)) == -1 &&
-        rtems_ofw_get_enc_prop(node, "ibm,phandle", &ref, sizeof(ref)) == -1 &&
-        rtems_ofw_get_enc_prop(node, "linux,phandle", &ref, sizeof(ref)) == -1)
+    if (rtems_ofw_get_enc_prop(node, "phandle", ref, sizeof(ref)) == -1 &&
+        rtems_ofw_get_enc_prop(node, "ibm,phandle", ref, sizeof(ref)) == -1 &&
+        rtems_ofw_get_enc_prop(node, "linux,phandle", ref, sizeof(ref)) == -1)
     {
       return node;
     }
 
-    return ref;
+    return ref[0];
 }
 
 phandle_t rtems_ofw_instance_to_package( ihandle_t instance )
@@ -614,7 +614,7 @@ int rtems_ofw_get_reg(
     offset = rtems_fdt_phandle_to_offset(parent);
     ptr = fdt_getprop(fdtp, offset, "ranges", &len);
 
-    if (len < 0) {
+    if (ptr == NULL) {
       break;
     }
 
-- 
2.17.1