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perf: correct tracer packet detection bounds check

This commit is contained in:
Trent Nelson 2022-06-01 00:54:47 -06:00 committed by Trent Nelson
parent 0b2d5291f8
commit ad82fe6372
1 changed files with 4 additions and 2 deletions
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6
perf/src/sigverify.rs
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@ -311,9 +311,11 @@ fn do_get_packet_offsets(
pub fn check_for_tracer_packet(packet: &mut Packet) -> bool {
let first_pubkey_start: usize = TRACER_KEY_OFFSET_IN_TRANSACTION;
let first_pubkey_end = first_pubkey_start.saturating_add(size_of::<Pubkey>());
let maybe_first_pubkey_end = first_pubkey_start
.checked_add(size_of::<Pubkey>())
.filter(|v| v <= &packet.meta.size);
// Check for tracer pubkey
if packet.meta.size > first_pubkey_start {
if let Some(first_pubkey_end) = maybe_first_pubkey_end {
let is_tracer_packet =
&packet.data()[first_pubkey_start..first_pubkey_end] == TRACER_KEY.as_ref();
if is_tracer_packet {