[tfaber] 71769: [NTOS:OB] - Use SEH to access the link target buffer in NtQuerySymbolicLinkObject CORE-11509

Author: tfaber
Date: Sun Jul  3 08:22:43 2016
New Revision: 71769

URL: http://svn.reactos.org/svn/reactos?rev=71769&view=rev
Log:
[NTOS:OB]
- Use SEH to access the link target buffer in NtQuerySymbolicLinkObject
CORE-11509

Modified:
    trunk/reactos/ntoskrnl/ob/oblink.c

Modified: trunk/reactos/ntoskrnl/ob/oblink.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/oblink.c?rev=71...
==============================================================================
--- trunk/reactos/ntoskrnl/ob/oblink.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ob/oblink.c	[iso-8859-1] Sun Jul  3 08:22:43 2016
@@ -603,9 +603,18 @@
         }

/* Copy it */
-        RtlCopyMemory(SymbolicLink->LinkTarget.Buffer,
-                      CapturedLinkTarget.Buffer,
-                      CapturedLinkTarget.MaximumLength);
+        _SEH2_TRY
+        {
+            RtlCopyMemory(SymbolicLink->LinkTarget.Buffer,
+                          CapturedLinkTarget.Buffer,
+                          CapturedLinkTarget.MaximumLength);
+        }
+        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+        {
+            ObDereferenceObject(SymbolicLink);
+            _SEH2_YIELD(return _SEH2_GetExceptionCode());
+        }
+        _SEH2_END;

/* Initialize the remaining name, dos drive index and target object */
         SymbolicLink->LinkTargetObject = NULL;