CVE-2021-29482: Loop with Unreachable Exit Condition (Infinite Loop)

xz is a compression and decompression library focusing on the xz format completely written in Go. The function readUvarint used to read the xz container format may not terminate a loop provide malicous input. As a workaround, users can limit the size of the compressed file input to a reasonable size for their use case. The standard library recently had the same issue described in CVE-2020-16845.