server: Don't grow the mapped file for read-only mappings.

dlls/kernel32/tests/virtual.c

@@ -1014,9 +1014,7 @@ static void test_MapViewOfFile(void)
     map_size.QuadPart = 0x3457;
     status = pNtCreateSection( &mapping, SECTION_QUERY | SECTION_MAP_READ, NULL,
                                &map_size, PAGE_READONLY, SEC_COMMIT, file );
-    todo_wine
     ok( status == STATUS_SECTION_TOO_BIG, "NtCreateSection failed %x\n", status );
-    if (!status) CloseHandle( mapping );
     status = pNtCreateSection( &mapping, SECTION_QUERY | SECTION_MAP_READ, NULL,
                                &map_size, PAGE_READONLY, SEC_IMAGE, file );
     ok( status == STATUS_INVALID_IMAGE_NOT_MZ, "NtCreateSection failed %x\n", status );

server/mapping.c

@@ -574,7 +574,15 @@ static struct object *create_mapping( struct object *root, const struct unicode_
                 goto error;
             }
         }
-        else if (st.st_size < mapping->size && !grow_file( unix_fd, mapping->size )) goto error;
+        else if (st.st_size < mapping->size)
+        {
+            if (!(access & FILE_WRITE_DATA))
+            {
+                set_error( STATUS_SECTION_TOO_BIG );
+                goto error;
+            }
+            if (!grow_file( unix_fd, mapping->size )) goto error;
+        }
     }
     else  /* Anonymous mapping (no associated file) */
     {