Constellation, Spacedust, Slingshot, UFOs: atproto crates and services for microcosm
more minimal fuzz repro
author
phil
date
(Apr 13, 2025, 3:27 PM -0400)
commit
02732001
02732001cb968e239353fda8c87a9e25c30c4143
parent
4a966494
4a96649475da5a26a17ad1eb468b31289e4623e9
+7
-17
+7
-17
ufos/fuzz/fuzz_targets/cardinality_estimator.rs
+7
-17
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::config::{Configuration, LittleEndian, Varint, 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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type C = Configuration<LittleEndian, Varint, Limit<1048576>>;
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static BINCODE_CONF: C = standard().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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if let Ok((mut estimator, _n)) = decode_from_slice::<CardinalityEstimator<String>, 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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// crash happens *much* faster if we just do kinda anything with the estimator
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estimator.insert(&"asdf".to_string());
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assert!(estimator.estimate() > 0);
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}
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});