Null-dereference READ in TIFFPrintDirectory

Summary

For custom tags there seems to be a missing null check inside the TIFFPrintDirectory method. The value of raw_data (https://gitlab.com/libtiff/libtiff/-/blob/80b003420d4e657379f7c96a71d421abb68a1087/libtiff/tif_print.c#L576) can be null when _TIFFPrettyPrintField and _TIFFPrintField are being called. And also undefined when fip->field_passcount is not zero.

Version

4.3.0

Steps to reproduce

The issue can be reproduced with this file:

clusterfuzz-testcase-minimized-ping_tiff64_fuzzer-5594621221666816.fuzz (with tag 37382)

Platform

Windows x64 Visual Studio 2019