fix(vote): uleb strict read#1589
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deserializeCompactVoteStateUpdate and deserializeTowerSync used std.leb.readUleb128, which accepts non-canonical encodings (trailing zero terminators and oversize terminator bits). Agave's solana_serde_varint and solana_short_vec both reject those, surfacing InvalidInstructionData via limited_deserialize. - Add readStrictCompactVarInt that rejects trailing-zero and overflow terminator bytes via NonCanonicalVarInt - Use it for the compact lockout length (ShortU16) and per-lockout offset (VarInt) in both compact decoders
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- Add readShortU16 mirroring solana_short_vec::ShortU16 deserializer - Add readVarInt mirroring solana_serde_varint deserializer for any unsigned int - Switch arrayListConfig to readShortU16 for strict length decoding - Replace local readStrictCompactVarInt in vote/state.zig with the shared helpers - Keep split between ShortU16 and VarInt to enable line-by-line audit against the two distinct agave wire-format specs
…arInt Switch all remaining call sites decoding agave wire format from std.leb.readUleb128 to the strict readShortU16 / readVarInt helpers, matching agave's rejection of non-canonical encodings. - sliceConfig.deserialize -> readShortU16 (transaction account_indexes, instruction data, address-lookup writable/readonly indexes) - Transaction/Message manual reads -> readShortU16 (signatures, account_keys, instructions, address_lookups counts) - VarIntConfig.deserialize -> readVarInt (gossip wallclock u64, SocketEntry offset u16) - ClientVersion bincode -> readVarInt (ClientId, major, packed_minor, packed_patch) - Add agave-derived test vectors covering aliases, overflow, trailing zeros, last-byte truncation, and shift overflow
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hamza-syndica
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Jun 16, 2026
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Intent
sol_txn_sig_structured_diffoctane lineage fixturesImplementation
solana_short_vecandsolana_serde_varintbehaviorRamifications
N/A
Tests
Fuzzed
uleb_txnanduleb_votewith no crashes 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