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[Altair] Avoid slicing in PartialBeaconState #2361

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Merged
merged 1 commit into from
May 21, 2021
Merged

[Altair] Avoid slicing in PartialBeaconState #2361

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10 changes: 5 additions & 5 deletions beacon_node/store/src/partial_beacon_state.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -170,14 +170,14 @@ impl<T: EthSpec> PartialBeaconState<T> {
// Slot is after genesis_time (u64) and genesis_validators_root (Hash256).
let slot_offset = <u64 as Decode>::ssz_fixed_len() + <Hash256 as Decode>::ssz_fixed_len();
let slot_len = <Slot as Decode>::ssz_fixed_len();
if bytes.len() < slot_offset + slot_len {
return Err(DecodeError::InvalidByteLength {
let slot_bytes = bytes.get(slot_offset..slot_offset + slot_len).ok_or(
DecodeError::InvalidByteLength {
len: bytes.len(),
expected: slot_offset + slot_len,
});
}
},
)?;

let slot = Slot::from_ssz_bytes(&bytes[slot_offset..slot_offset + slot_len])?;
let slot = Slot::from_ssz_bytes(slot_bytes)?;

if spec
.altair_fork_slot
Expand Down