gdal: Heap-buffer-overflow in png_sig_cmp

Project: https://github.com/OSGeo/gdal.git Detailed report: https://oss-fuzz.com/testcase?key=5113378454372352 Project: gdal Fuzzer: libFuzzergdalfuzzer Job Type: libfuzzerasangdal Platform Id: linux Crash Type: Heap-buffer-overflow READ 8 Crash Address: 0x6100000008f4 Crash State: pngsigcmp decp...