Nikolay Sivov : ntdll: Allow NULL return length argument in NtAdjustPrivilegesToken().

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 2007dcf8696998488eacc1c9670699011d4dd4d6
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2007dcf8696998488eacc1c9670699011d4dd4d6

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Mon Dec  2 09:38:09 2013 +0400

ntdll: Allow NULL return length argument in NtAdjustPrivilegesToken().

(cherry picked from commit fd65b0a1c3f5f981cc110ca9e6a0edb6323e1296)

---

 dlls/advapi32/security.c |    5 +++--
 dlls/ntdll/nt.c          |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/dlls/advapi32/security.c b/dlls/advapi32/security.c
index 359b1e2..a77bad4 100644
--- a/dlls/advapi32/security.c
+++ b/dlls/advapi32/security.c
@@ -611,8 +611,9 @@ AdjustTokenPrivileges( HANDLE TokenHandle, BOOL DisableAllPrivileges,
 {
     NTSTATUS status;
 
-    TRACE("\n");
-    
+    TRACE("(%p %d %p %d %p %p)\n", TokenHandle, DisableAllPrivileges, NewState, BufferLength,
+        PreviousState, ReturnLength);
+
     status = NtAdjustPrivilegesToken(TokenHandle, DisableAllPrivileges,
                                                      NewState, BufferLength, PreviousState,
                                                      ReturnLength);
diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index 1eff375..39139c9 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -223,7 +223,7 @@ NTSTATUS WINAPI NtAdjustPrivilegesToken(
         ret = wine_server_call( req );
         if (PreviousState)
         {
-            *ReturnLength = reply->len + FIELD_OFFSET( TOKEN_PRIVILEGES, Privileges );
+            if (ReturnLength) *ReturnLength = reply->len + FIELD_OFFSET( TOKEN_PRIVILEGES, Privileges );
             PreviousState->PrivilegeCount = reply->len / sizeof(LUID_AND_ATTRIBUTES);
         }
     }