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Fix fuzzer-found underflow

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Valentine Wallace 2022-08-05 13:15:57 -04:00
parent b414c0641b
commit 81b7b03d4f
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1 changed files with 1 additions and 1 deletions
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lightning/src/onion_message/packet.rs
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@ -69,7 +69,7 @@ impl LengthReadable for Packet {
let public_key = Readable::read(r)?; let public_key = Readable::read(r)?;
let mut hop_data = Vec::new(); let mut hop_data = Vec::new();
let hop_data_len = r.total_bytes() as usize - 66; // 1 (version) + 33 (pubkey) + 32 (HMAC) = 66 let hop_data_len = r.total_bytes().saturating_sub(66) as usize; // 1 (version) + 33 (pubkey) + 32 (HMAC) = 66
let mut read_idx = 0; let mut read_idx = 0;
while read_idx < hop_data_len { while read_idx < hop_data_len {
let mut read_buffer = [0; READ_BUFFER_SIZE]; let mut read_buffer = [0; READ_BUFFER_SIZE];