[pschweitzer] 71221: [KS] - Don't leak memory in KspValidateConnectRequest(), patch by Victor Martinez - Also compute connect medium ID string only twice (could be even computed once) instead of do...

Author: pschweitzer
Date: Sun May  1 08:25:22 2016
New Revision: 71221

URL: http://svn.reactos.org/svn/reactos?rev=71221&view=rev
Log:
[KS]
- Don't leak memory in KspValidateConnectRequest(), patch by Victor Martinez
- Also compute connect medium ID string only twice (could be even computed once) instead
of doing so in each loop iteration

CORE-11099 #resolve #comment Committed in r71221 

Modified:
    trunk/reactos/drivers/ksfilter/ks/connectivity.c

Modified: trunk/reactos/drivers/ksfilter/ks/connectivity.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/ksfilter/ks/connec…
==============================================================================
--- trunk/reactos/drivers/ksfilter/ks/connectivity.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/ksfilter/ks/connectivity.c	[iso-8859-1] Sun May  1 08:25:22
2016
@@ -73,6 +73,7 @@
     ULONG Count;
     BOOLEAN Found;
     PKSPIN_DESCRIPTOR Descriptor;
+    UNICODE_STRING GuidString2;
 
     /* did the caller miss the connect parameter */
     if (!Connect)
@@ -93,7 +94,10 @@
 
     /* is pin id out of bounds */
     if (ConnectDetails->PinId >= DescriptorsCount)
+    {
+        FreeItem(ConnectDetails);
         return STATUS_INVALID_PARAMETER;
+    }
 
     if (DescriptorSize == sizeof(KSPIN_DESCRIPTOR))
     {
@@ -124,14 +128,16 @@
     /* now check the interface */
     Found = FALSE;
     Index = 0;
+    RtlStringFromGUID(&ConnectDetails->Interface.Set, &GuidString2);
     do
     {
-        UNICODE_STRING GuidString, GuidString2;
+        UNICODE_STRING GuidString;
         RtlStringFromGUID(&Interface[Index].Set, &GuidString);
-        RtlStringFromGUID(&ConnectDetails->Interface.Set, &GuidString2);
 
         DPRINT("Driver Interface %S Id %u\n", GuidString.Buffer,
Interface[Index].Id);
         DPRINT("Connect Interface %S Id %u\n", GuidString2.Buffer,
ConnectDetails->Interface.Id);
+
+        RtlFreeUnicodeString(&GuidString);
 
         if (IsEqualGUIDAligned(&Interface[Index].Set,
&ConnectDetails->Interface.Set) &&
                                Interface[Index].Id == ConnectDetails->Interface.Id)
@@ -143,10 +149,12 @@
         /* iterate to next interface */
         Index++;
     }while(Index < Count);
+    RtlFreeUnicodeString(&GuidString2);
 
     if (!Found)
     {
         /* pin doesnt support this interface */
+        FreeItem(ConnectDetails);
         return STATUS_NO_MATCH;
     }
 
@@ -167,15 +175,16 @@
     /* now check the interface */
     Found = FALSE;
     Index = 0;
+    RtlStringFromGUID(&ConnectDetails->Medium.Set, &GuidString2);
     do
     {
-        UNICODE_STRING GuidString, GuidString2;
+        UNICODE_STRING GuidString;
         RtlStringFromGUID(&Medium[Index].Set, &GuidString);
-        RtlStringFromGUID(&ConnectDetails->Medium.Set, &GuidString2);
 
         DPRINT("Driver Medium %S Id %u\n", GuidString.Buffer,
Medium[Index].Id);
         DPRINT("Connect Medium %S Id %u\n", GuidString2.Buffer,
ConnectDetails->Medium.Id);
 
+        RtlFreeUnicodeString(&GuidString);
 
         if (IsEqualGUIDAligned(&Medium[Index].Set,
&ConnectDetails->Medium.Set) &&
                                Medium[Index].Id == ConnectDetails->Medium.Id)
@@ -185,15 +194,15 @@
             break;
         }
 
-
-
         /* iterate to next medium */
         Index++;
     }while(Index < Count);
+    RtlFreeUnicodeString(&GuidString2);
 
     if (!Found)
     {
         /* pin doesnt support this medium */
+        FreeItem(ConnectDetails);
         return STATUS_NO_MATCH;
     }