[PATCH 2/2] advapi32: Fix the initialization of combined DACLs when the new DACL is empty.

[Vijay Kiran Kamuju]

From: "Erich E. Hoover" <erich.e.hoover at wine-staging.com>

Wine-Bug:  https://bugs.winehq.org/show_bug.cgi?id=38423
From: Erich E. Hoover <erich.e.hoover at wine-staging.com>
Signed-off-by: Vijay Kiran Kamuju <infyquest at gmail.com>
---
 dlls/advapi32/security.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/dlls/advapi32/security.c b/dlls/advapi32/security.c
index c2c45aca4ae..a2ff678aabd 100644
--- a/dlls/advapi32/security.c
+++ b/dlls/advapi32/security.c
@@ -5966,6 +5966,7 @@ BOOL WINAPI FileEncryptionStatusA(LPCSTR lpFileName, LPDWORD lpStatus)
 
 static NTSTATUS combine_dacls(ACL *parent, ACL *child, ACL **result)
 {
+    NTSTATUS status;
     ACL *combined;
     int i;
 
@@ -5974,8 +5975,26 @@ static NTSTATUS combine_dacls(ACL *parent, ACL *child, ACL **result)
     if (!combined)
         return STATUS_NO_MEMORY;
 
-    memcpy(combined, child, child->AclSize);
-    combined->AclSize = child->AclSize+parent->AclSize;
+    status = RtlCreateAcl(combined, parent->AclSize+child->AclSize, ACL_REVISION);
+    if (status != STATUS_SUCCESS)
+    {
+        heap_free(combined);
+        return status;
+    }
+
+    /* copy the new ACEs */
+    for (i=0; i<child->AceCount; i++)
+    {
+        ACE_HEADER *ace;
+
+        if (!GetAce(child, i, (void*)&ace))
+        {
+            WARN("error obtaining new ACE\n");
+            continue;
+        }
+        if (!AddAce(combined, ACL_REVISION, MAXDWORD, ace, ace->AceSize))
+            WARN("error adding new ACE\n");
+    }
 
     /* copy the inherited ACEs */
     for (i=0; i<parent->AceCount; i++)
-- 
2.17.0