reg: Fail if the data value passed with REG_DWORD will cause an overflow.

programs/reg/reg.c

@@ -19,6 +19,7 @@
 #include <windows.h>
 #include <wine/unicode.h>
 #include <wine/debug.h>
+#include <errno.h>
 #include "reg.h"
 
 #define ARRAY_SIZE(A) (sizeof(A)/sizeof(*A))
@@ -244,7 +245,7 @@ static LPBYTE get_regdata(LPWSTR data, DWORD reg_type, WCHAR separator, DWORD *r
             LPWSTR rest;
             DWORD val;
             val = strtoulW(data, &rest, (tolowerW(data[1]) == 'x') ? 16 : 10);
-            if (*rest || data[0] == '-') {
+            if (*rest || data[0] == '-' || (val == ~0u && errno == ERANGE)) {
                 output_message(STRING_MISSING_INTEGER);
                 break;
             }

programs/reg/tests/reg.c

@@ -288,7 +288,7 @@ static void test_add(void)
     ok(r == REG_EXIT_FAILURE || broken(r == REG_EXIT_SUCCESS /* WinXP */), "got exit code %u\n", r);
 
     run_reg_exe("reg add HKCU\\" KEY_BASE " /v dword8 /t REG_dword /d 0x01ffffffff /f", &r);
-    todo_wine ok(r == REG_EXIT_FAILURE || broken(r == REG_EXIT_SUCCESS /* WinXP */), "got exit code %d\n", r);
+    ok(r == REG_EXIT_FAILURE || broken(r == REG_EXIT_SUCCESS /* WinXP */), "got exit code %d\n", r);
 
     run_reg_exe("reg add HKCU\\" KEY_BASE " /v dword12 /t REG_DWORD /d 0xffffffff /f", &r);
     ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);