[tfaber] 71308: [IPHLPAPI] - Don't use uninitialized values in AllocateAndGet*TableFromStack functions. CID 716757 - Free buffers on failure CORE-11227 #resolve

Author: tfaber
Date: Tue May 10 17:53:36 2016
New Revision: 71308

URL: http://svn.reactos.org/svn/reactos?rev=71308&view=rev
Log:
[IPHLPAPI]
- Don't use uninitialized values in AllocateAndGet*TableFromStack functions. CID
716757
- Free buffers on failure
CORE-11227 #resolve

Modified:
    trunk/reactos/dll/win32/iphlpapi/iphlpapi_main.c

Modified: trunk/reactos/dll/win32/iphlpapi/iphlpapi_main.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/iphlpapi/iphlpap…
==============================================================================
--- trunk/reactos/dll/win32/iphlpapi/iphlpapi_main.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/iphlpapi/iphlpapi_main.c	[iso-8859-1] Tue May 10 17:53:36
2016
@@ -117,10 +117,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppIfTable = NULL;
     ret = GetIfTable(*ppIfTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppIfTable = (PMIB_IFTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetIfTable(*ppIfTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppIfTable);
+        *ppIfTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);
@@ -156,10 +161,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppIpAddrTable = NULL;
     ret = GetIpAddrTable(*ppIpAddrTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppIpAddrTable = (PMIB_IPADDRTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetIpAddrTable(*ppIpAddrTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppIpAddrTable);
+        *ppIpAddrTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);
@@ -193,10 +203,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppIpForwardTable = NULL;
     ret = GetIpForwardTable(*ppIpForwardTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppIpForwardTable = (PMIB_IPFORWARDTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetIpForwardTable(*ppIpForwardTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppIpForwardTable);
+        *ppIpForwardTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);
@@ -232,10 +247,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppIpNetTable = NULL;
     ret = GetIpNetTable(*ppIpNetTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppIpNetTable = (PMIB_IPNETTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetIpNetTable(*ppIpNetTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppIpNetTable);
+        *ppIpNetTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);
@@ -271,10 +291,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppTcpTable = NULL;
     ret = GetTcpTable(*ppTcpTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppTcpTable = (PMIB_TCPTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetTcpTable(*ppTcpTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppTcpTable);
+        *ppTcpTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);
@@ -310,10 +335,15 @@
   else {
     DWORD dwSize = 0;
 
+    *ppUdpTable = NULL;
     ret = GetUdpTable(*ppUdpTable, &dwSize, bOrder);
     if (ret == ERROR_INSUFFICIENT_BUFFER) {
       *ppUdpTable = (PMIB_UDPTABLE)HeapAlloc(heap, flags, dwSize);
       ret = GetUdpTable(*ppUdpTable, &dwSize, bOrder);
+      if (ret != NO_ERROR) {
+        HeapFree(heap, flags, *ppUdpTable);
+        *ppUdpTable = NULL;
+      }
     }
   }
   TRACE("returning %ld\n", ret);