Rob Shearman : msi: Passing NULL for szBuffer and NULL for pcchValueBuf into MsiGetProductInfo{A , W} shouldn't crash.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 58130dde08396f2b93481e9166f6ecae4a4446e2
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=58130dde08396f2b93481e9166...

Author: Rob Shearman <rob(a)codeweavers.com>
Date:   Wed Mar 12 17:40:51 2008 +0000

msi: Passing NULL for szBuffer and NULL for pcchValueBuf into MsiGetProductInfo{A, W} shouldn't crash.

Add a test for this.

---

 dlls/msi/msi.c       |   27 ++++++++++++++++-----------
 dlls/msi/tests/msi.c |    4 ++++
 2 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/dlls/msi/msi.c b/dlls/msi/msi.c
index 85446e8..32a4173 100644
--- a/dlls/msi/msi.c
+++ b/dlls/msi/msi.c
@@ -722,20 +722,25 @@ static UINT WINAPI MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
         goto done;
     }
 
-    save = *pcchValueBuf;
+    if (pcchValueBuf)
+    {
+        save = *pcchValueBuf;
 
-    if (lstrlenW(val) < *pcchValueBuf)
-        r = msi_strcpy_to_awstring(val, szValue, pcchValueBuf);
-    else if (szValue->str.a || szValue->str.w)
-        r = ERROR_MORE_DATA;
+        if (lstrlenW(val) < *pcchValueBuf)
+            r = msi_strcpy_to_awstring(val, szValue, pcchValueBuf);
+        else if (szValue->str.a || szValue->str.w)
+            r = ERROR_MORE_DATA;
 
-    if (!badconfig)
-        *pcchValueBuf = lstrlenW(val);
-    else if (r == ERROR_SUCCESS)
-    {
-        *pcchValueBuf = save;
-        r = ERROR_BAD_CONFIGURATION;
+        if (!badconfig)
+            *pcchValueBuf = lstrlenW(val);
+        else if (r == ERROR_SUCCESS)
+        {
+            *pcchValueBuf = save;
+            r = ERROR_BAD_CONFIGURATION;
+        }
     }
+    else if (badconfig)
+        r = ERROR_BAD_CONFIGURATION;
 
     if (val != empty)
         msi_free(val);
diff --git a/dlls/msi/tests/msi.c b/dlls/msi/tests/msi.c
index f82a9a9..5da8673 100644
--- a/dlls/msi/tests/msi.c
+++ b/dlls/msi/tests/msi.c
@@ -2233,6 +2233,10 @@ static void test_MsiGetProductInfo(void)
     ok(!lstrcmpA(buf, "link"), "Expected \"link\", got \"%s\"\n", buf);
     ok(sz == 4, "Expected 4, got %d\n", sz);
 
+    /* pcchBuf is NULL */
+    r = MsiGetProductInfoA(prodcode, INSTALLPROPERTY_HELPLINK, NULL, NULL);
+    ok(r == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", r);
+
     /* lpValueBuf is NULL */
     sz = MAX_PATH;
     r = MsiGetProductInfoA(prodcode, INSTALLPROPERTY_HELPLINK, NULL, &sz);