From 2e5bf9ca066c8c042ac0be5ef12497245b4a0c11 Mon Sep 17 00:00:00 2001
From: Hans Leidekker <hans@codeweavers.com>
Date: Mon, 23 Apr 2012 15:46:41 +0200
Subject: [PATCH] msi: Dynamically allocate the path buffer in
 MsiQueryComponentStateW.

---
 dlls/msi/msi.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/dlls/msi/msi.c b/dlls/msi/msi.c
index 35ffe9efd19..baef974b157 100644
--- a/dlls/msi/msi.c
+++ b/dlls/msi/msi.c
@@ -2148,7 +2148,7 @@ static BOOL msi_comp_find_package(LPCWSTR prodcode, MSIINSTALLCONTEXT context)
     return (res == ERROR_SUCCESS);
 }
 
-static BOOL msi_comp_find_prodcode(LPWSTR squished_pc,
+static UINT msi_comp_find_prodcode(LPWSTR squished_pc,
                                    MSIINSTALLCONTEXT context,
                                    LPCWSTR comp, LPWSTR val, DWORD *sz)
 {
@@ -2162,14 +2162,14 @@ static BOOL msi_comp_find_prodcode(LPWSTR squished_pc,
         r = MSIREG_OpenUserDataComponentKey(comp, NULL, &hkey, FALSE);
 
     if (r != ERROR_SUCCESS)
-        return FALSE;
+        return r;
 
     res = RegQueryValueExW(hkey, squished_pc, NULL, NULL, (BYTE *)val, sz);
     if (res != ERROR_SUCCESS)
-        return FALSE;
+        return res;
 
     RegCloseKey(hkey);
-    return TRUE;
+    return res;
 }
 
 UINT WINAPI MsiQueryComponentStateW(LPCWSTR szProductCode,
@@ -2177,7 +2177,6 @@ UINT WINAPI MsiQueryComponentStateW(LPCWSTR szProductCode,
                                     LPCWSTR szComponent, INSTALLSTATE *pdwState)
 {
     WCHAR squished_pc[GUID_SIZE];
-    WCHAR val[MAX_PATH];
     BOOL found;
     DWORD sz;
 
@@ -2208,14 +2207,21 @@ UINT WINAPI MsiQueryComponentStateW(LPCWSTR szProductCode,
 
     *pdwState = INSTALLSTATE_UNKNOWN;
 
-    sz = MAX_PATH;
-    if (!msi_comp_find_prodcode(squished_pc, dwContext, szComponent, val, &sz))
+    sz = 0;
+    if (msi_comp_find_prodcode(squished_pc, dwContext, szComponent, NULL, &sz))
         return ERROR_UNKNOWN_COMPONENT;
 
     if (sz == 0)
         *pdwState = INSTALLSTATE_NOTUSED;
     else
     {
+        WCHAR *val;
+        UINT r;
+
+        if (!(val = msi_alloc( sz ))) return ERROR_OUTOFMEMORY;
+        if ((r = msi_comp_find_prodcode(squished_pc, dwContext, szComponent, val, &sz)))
+            return r;
+
         if (lstrlenW(val) > 2 &&
             val[0] >= '0' && val[0] <= '9' && val[1] >= '0' && val[1] <= '9' && val[2] != ':')
         {
@@ -2223,6 +2229,7 @@ UINT WINAPI MsiQueryComponentStateW(LPCWSTR szProductCode,
         }
         else
             *pdwState = INSTALLSTATE_LOCAL;
+        msi_free( val );
     }
 
     TRACE("-> %d\n", *pdwState);