OSV-2021-1689 Stack-buffer-underflow in read_xref

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42294 Crash type: Stack-buffer-underflow WRITE 1 Crash state: readxref pdfireadxref pdfisetinputstream...

OSV-2021-1682 Heap-buffer-overflow in pdfi_repair_file

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42325 Crash type: Heap-buffer-overflow WRITE 4 Crash state: pdfirepairfile pdfireadxrefstreamdict pdfireadxref...