[PATCH v2 4/5] msiexec: Don't keep the custom action GUID in the main thread's stack.

[Zebediah Figura]

Since it could potentially change on us during an asynchronous custom action.

Signed-off-by: Zebediah Figura 
---
 programs/msiexec/msiexec.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/programs/msiexec/msiexec.c b/programs/msiexec/msiexec.c
index ead3bfb..efbcb5c 100644
--- a/programs/msiexec/msiexec.c
+++ b/programs/msiexec/msiexec.c
@@ -28,6 +28,7 @@
 #include <stdio.h>

#include "wine/debug.h"
+#include "wine/heap.h"
 #include "wine/unicode.h"

#include "initguid.h"
@@ -400,20 +401,21 @@ extern UINT CDECL __wine_msi_call_dll_function(GUID *guid);

static DWORD CALLBACK custom_action_thread(void *arg)
 {
-    GUID *guid = arg;
-    return __wine_msi_call_dll_function(guid);
+    GUID guid = *(GUID *)arg;
+    heap_free(arg);
+    return __wine_msi_call_dll_function(&guid);
 }

static int custom_action_server(const WCHAR *arg)
 {
     static const WCHAR pipe_name[] = {'\','\','.','\','p','i','p','e','\','m','s','i','c','a','_','%','x','_','%','d',0};
     DWORD client_pid = atoiW(arg);
+    GUID guid, *thread_guid;
     DWORD64 thread64;
     WCHAR buffer[24];
     HANDLE thread;
     HANDLE pipe;
     DWORD size;
-    GUID guid;

TRACE("%s\n", debugstr_w(arg));

@@ -443,7 +445,9 @@ static int custom_action_server(const WCHAR *arg)
             return 0;
         }

-        thread = CreateThread(NULL, 0, custom_action_thread, &guid, 0, NULL);
+        thread_guid = heap_alloc(sizeof(GUID));
+        memcpy(thread_guid, &guid, sizeof(GUID));
+        thread = CreateThread(NULL, 0, custom_action_thread, thread_guid, 0, NULL);

/* give the thread handle to the client to wait on, since we might have
          * to run a nested action and can't block during this one */