OSV-2020-62 Stack-buffer-overflow in tvb_get_ipv4_addr_with_prefix_len

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21715 Crash type: Stack-buffer-overflow READ 4 Crash state: tvbgetipv4addrwithprefixlen decodepathprefix4 decodeprefixMP...