ntdll: Handle NULL process handle in MapViewOfFile3().

dlls/kernelbase/memory.c

@@ -265,6 +265,8 @@ LPVOID WINAPI DECLSPEC_HOTPATCH MapViewOfFile3( HANDLE handle, HANDLE process, P
     LARGE_INTEGER off;
     void *addr;
 
+    if (!process) process = GetCurrentProcess();
+
     addr = baseaddr;
     off.QuadPart = offset;
     if (!set_ntstatus( NtMapViewOfSectionEx( handle, process, &addr, &off, &size, alloc_type, protection,

dlls/kernelbase/tests/process.c

@@ -123,7 +123,7 @@ static void test_MapViewOfFile3(void)
     ok( mapping != 0, "CreateFileMapping error %lu\n", GetLastError() );
 
     SetLastError(0xdeadbeef);
-    ptr = pMapViewOfFile3( mapping, GetCurrentProcess(), NULL, 0, 4096, 0, PAGE_READONLY, NULL, 0);
+    ptr = pMapViewOfFile3( mapping, NULL, NULL, 0, 4096, 0, PAGE_READONLY, NULL, 0);
     ok( ptr != NULL, "MapViewOfFile FILE_MAP_READ error %lu\n", GetLastError() );
     UnmapViewOfFile( ptr );
 

dlls/ntdll/tests/virtual.c

@@ -1149,6 +1149,12 @@ static void test_NtMapViewOfSection(void)
     ptr = NULL;
     size = 0;
     offset.QuadPart = 0;
+    status = NtMapViewOfSection(mapping, NULL, &ptr, 0, 0, &offset, &size, 1, 0, PAGE_READWRITE);
+    ok(status == STATUS_INVALID_HANDLE, "NtMapViewOfSection returned %08lx\n", status);
+
+    ptr = NULL;
+    size = 0;
+    offset.QuadPart = 0;
     status = NtMapViewOfSection(mapping, process, &ptr, 0, 0, &offset, &size, 1, 0, PAGE_READWRITE);
     ok(status == STATUS_SUCCESS, "NtMapViewOfSection returned %08lx\n", status);
     ok(!((ULONG_PTR)ptr & 0xffff), "returned memory %p is not aligned to 64k\n", ptr);
@@ -1422,6 +1428,12 @@ static void test_NtMapViewOfSectionEx(void)
     ptr = NULL;
     size = 0x1000;
     offset.QuadPart = 0;
+    status = pNtMapViewOfSectionEx(mapping, NULL, &ptr, &offset, &size, 0, PAGE_READWRITE, NULL, 0);
+    ok(status == STATUS_INVALID_HANDLE, "Unexpected status %08lx\n", status);
+
+    ptr = NULL;
+    size = 0x1000;
+    offset.QuadPart = 0;
     status = pNtMapViewOfSectionEx(mapping, process, &ptr, &offset, &size, 0, PAGE_READWRITE, NULL, 0);
     ok(status == STATUS_SUCCESS, "Unexpected status %08lx\n", status);
     ok(!((ULONG_PTR)ptr & 0xffff), "returned memory %p is not aligned to 64k\n", ptr);