[solana_rbpf] Integer overflow in solana_rbpf

From version 0.2.14 to 0.2.16 for Solana rBPF, function “relocate” in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable “addr” via “addr = (sym.st_value + refd_pa) as u64”;

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-46102
• https://github.com/solana-labs/rbpf/pull/200
• https://github.com/solana-labs/rbpf/pull/236
• https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159ee
• https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630
• https://github.com/solana-labs/rbpf/releases/tag/v0.2.17
• https://github.com/advisories/GHSA-xwqr-xmgg-j69q