Constellation, Spacedust, Slingshot, UFOs: atproto crates and services for microcosm
simpler fuzz targets take a lot longer to crash
author
phil
date
(Apr 11, 2025, 3:13 PM -0400)
commit
4a966494
4a96649475da5a26a17ad1eb468b31289e4623e9
parent
a38ee2b5
a38ee2b50a184988fdbb9a30ac316099c62b1f05
+74
-6
+2
Cargo.lock
+2
Cargo.lock
+18
-6
ufos/fuzz/Cargo.toml
+18
-6
ufos/fuzz/Cargo.toml
···
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[dependencies]
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libfuzzer-sys = "0.4"
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-
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[dependencies.ufos]
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path = ".."
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-
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[dependencies.jetstream]
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path = "../../jetstream"
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ufos = { path = ".." }
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jetstream = { path = "../../jetstream" }
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bincode = { version = "2.0.1", features = ["serde"] }
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cardinality-estimator = { version = "1.0.2", features = ["with_serde"] }
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[target.'cfg(not(target_env = "msvc"))'.dependencies]
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tikv-jemallocator = "0.6.0"
···
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test = false
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doc = false
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bench = false
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[[bin]]
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name = "estimated_dids_value"
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path = "fuzz_targets/estimated_dids_value.rs"
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test = false
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doc = false
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bench = false
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[[bin]]
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name = "cardinality_estimator"
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path = "fuzz_targets/cardinality_estimator.rs"
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test = false
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doc = false
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bench = false
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ufos/fuzz/fuzz_targets/cardinality_estimator.rs
+30
ufos/fuzz/fuzz_targets/cardinality_estimator.rs
···
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#![no_main]
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use jetstream::exports::Did;
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use bincode::config::{Configuration, BigEndian, Fixint, Limit, standard};
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use bincode::serde::decode_from_slice;
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use cardinality_estimator::CardinalityEstimator;
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use libfuzzer_sys::fuzz_target;
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#[cfg(not(target_env = "msvc"))]
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use tikv_jemallocator::Jemalloc;
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#[cfg(not(target_env = "msvc"))]
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#[global_allocator]
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static GLOBAL: Jemalloc = Jemalloc;
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type C = Configuration<BigEndian, Fixint, Limit<1048576>>;
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static BINCODE_CONF: C =
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standard()
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.with_big_endian()
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.with_fixed_int_encoding()
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.with_limit::<1048576>();
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fuzz_target!(|data: &[u8]| {
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if let Ok((estimator, _n)) = decode_from_slice::<CardinalityEstimator<Did>, C>(
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data,
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BINCODE_CONF,
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) {
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estimator.estimate();
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}
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});
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ufos/fuzz/fuzz_targets/estimated_dids_value.rs
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ufos/fuzz/fuzz_targets/estimated_dids_value.rs
···
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#![no_main]
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// use jetstream::exports::Did;
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use ufos::db_types::DbBytes;
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use ufos::store_types::EstimatedDidsValue;
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use libfuzzer_sys::fuzz_target;
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#[cfg(not(target_env = "msvc"))]
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use tikv_jemallocator::Jemalloc;
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#[cfg(not(target_env = "msvc"))]
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#[global_allocator]
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static GLOBAL: Jemalloc = Jemalloc;
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fuzz_target!(|data: &[u8]| {
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if let Ok((counts_value, n)) = EstimatedDidsValue::from_db_bytes(data) {
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assert!(n <= data.len());
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let serialized = counts_value.to_db_bytes().unwrap();
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assert_eq!(serialized.len(), n);
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let (and_back, n_again) = EstimatedDidsValue::from_db_bytes(&serialized).unwrap();
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assert_eq!(n_again, n);
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assert_eq!(and_back.0.estimate(), counts_value.0.estimate());
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}
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});