Fix #79423: copy command is limited to size of file it can copy

Passing `NULL` as `lpFileSizeHigh` to `GetFileSize()` gives wrong
results for files larger than 0xFFFFFFFF bytes.  We fix this by using
`GetFileSizeEx()`, and let the mapping fail, if the file size is too
large for the architecture.

Closes GH-5319.

Author: cmb69

NEWS

@@ -2,6 +2,10 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? ????, PHP 7.3.24
 
+- Core:
+  . Fixed bug #79423 (copy command is limited to size of file it can copy).
+    (cmb)
+
 - MySQLnd:
   . Fixed bug #80115 (mysqlnd.debug doesn't recognize absolute paths with
     slashes). (cmb)

main/streams/plain_wrapper.c

@@ -749,6 +749,7 @@ static int php_stdiop_set_option(php_stream *stream, int option, int value, void
 				php_stream_mmap_range *range = (php_stream_mmap_range*)ptrparam;
 				HANDLE hfile = (HANDLE)_get_osfhandle(fd);
 				DWORD prot, acc, loffs = 0, delta = 0;
+				LARGE_INTEGER file_size;
 
 				switch (value) {
 					case PHP_STREAM_MMAP_SUPPORTED:
@@ -785,7 +786,22 @@ static int php_stdiop_set_option(php_stream *stream, int option, int value, void
 							return PHP_STREAM_OPTION_RETURN_ERR;
 						}
 
-						size = GetFileSize(hfile, NULL);
+						if (!GetFileSizeEx(hfile, &file_size)) {
+							CloseHandle(data->file_mapping);
+							data->file_mapping = NULL;
+							return PHP_STREAM_OPTION_RETURN_ERR;
+						}
+# if defined(_WIN64)
+						size = file_size.QuadPart;
+# else
+						if (file_size.HighPart) {
+							CloseHandle(data->file_mapping);
+							data->file_mapping = NULL;
+							return PHP_STREAM_OPTION_RETURN_ERR;
+						} else {
+							size = file_size.LowPart;
+						}
+# endif
 						if (range->offset > size) {
 							range->offset = size;
 						}