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Eugene Siegel

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20 commits1 monitored projects3 candidates0 high-risk analyses
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Bitcoin CoreBitcoin Core20 commits3 candidates0 high risk
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Moderate 54 AI analysisMessage 85 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: move cs_main up in FetchBlock to fix rpc assert crash

This commit fixes a rare crash in Bitcoin Core's networking code. When a user called a specific RPC command to fetch a block, the program could crash with an assertion failure if a peer disconnected at exactly the wrong moment. The fix mov…

Assertion failure / crash in RPC pathRace condition between RPC worker thread and peer finalizationMissing synchronization around peer lifecycle lookup
359680b7by Eugene Siegel+6−21 file
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Informational 19 AI analysisMessage 65 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: un-default the OpenNetworkConnection()'s proxy_override argument

This change removes a default value for a network-connection setting called proxy_override. Previously, callers could leave it unset without thinking. Now every caller must explicitly pass a value, which helps prevent accidental mistakes a…

Defensive API hardening: removing a default argument to force explicit decisions about proxy routingNo functional change: all call sites pass std::nullopt, matching the previous defaultPotential future security relevance: prevents accidental omission of proxy_override in new call sites, which could affect network privacy or reachability
bf0d257cby Eugene Siegel+43−93 files
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Informational 15 AI analysisMessage 83 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: use ImmediateBackgroundTaskRunner to silence DEBUG_LOCKORDER

This change only affects an internal fuzzing test harness (a tool used to automatically find bugs in Bitcoin Core). It swaps the task runner used during fuzz testing so that lock-order debugging warnings no longer report a false alarm. The…

Change is confined to a fuzz test harness (src/test/fuzz/cmpctblock.cpp)No production consensus, networking, wallet, or validation logic is modifiedThe lock-order report being silenced is explicitly described by the author as a false positive
801d36f5by Eugene Siegel+13−01 file
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Informational 15 AI analysisMessage 80 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: send blocktxn messages in cmpctblock harness

This commit adds a new test case to an existing fuzzing harness for Bitcoin Core's compact block (cmpctblock) handling. It does not change production code, network behavior, or wallet logic. The new code only runs inside a fuzz test and ra…

c8d688f4by Eugene Siegel+23−01 file
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Informational 15 AI analysisMessage 78 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: send compact blocks in cmpctblock harness

This commit only adds new fuzz testing code for Bitcoin Core's compact block (CMPCTBLOCK) handling. It does not change any production network or consensus code, so it cannot introduce a runtime security vulnerability in the software users …

No production code changedOnly fuzz test harness modifiedAssertions added are test-only invariants
d0333bfeby Eugene Siegel+105−01 file
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Informational 15 AI analysisMessage 95 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: mine blocks and send headers for them in cmpctblock harness

This commit only changes Bitcoin Core's internal fuzz testing code. It expands a fuzz harness so that the test can mine fake blocks and send headers for them, improving test coverage for compact block processing. There is no change to prod…

3c58efe2by Eugene Siegel+130−103 files
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Informational 15 AI analysisMessage 83 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: create and send transactions in cmpctblock harness

This commit only changes a fuzz test file (src/test/fuzz/cmpctblock.cpp). It makes the compact-block fuzzing harness create and send fake transactions during testing, and resets internal test state if the mempool changes. There is no chang…

65162243by Eugene Siegel+80−11 file
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Informational 15 AI analysisMessage 75 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net, fuzz: move CMPCTBLOCK_VERSION to header, use in cmpctblock harness

This commit moves a constant for compact block version from one file to a shared header and updates a fuzz test to exercise the sendcmpct network message. It is a test/refactoring change with no visible security fix or behavior change in p…

8c9a3fd0by Eugene Siegel+84−23 files
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Informational 15 AI analysisMessage 70 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: initial compact block fuzz harness

This commit adds a new fuzz-testing harness for compact block relay in Bitcoin Core. Fuzz testing is an automated quality-assurance technique that feeds random or semi-random data into code to find crashes or bugs. The harness currently on…

6cd480f6by Eugene Siegel+96−02 files
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Low 25 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

rpc: fix initialization-order-fiasco by lazy-init of decodepsbt_inputs

This commit fixes a subtle startup bug in Bitcoin Core's RPC help system. Some help text for commands like 'decodepsbt' and 'getblock' was being built before all global constants were ready, which could cause crashes or garbled output when…

Static initialization order fiasco (SIOF) in RPC help metadata constructionCross-translation-unit dependency on CURRENCY_UNIT global constantLazy initialization via function-local static used as fix pattern
d517fa0aby Eugene Siegel+221−2092 files
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Informational 15 AI analysisMessage 78 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: register PeerManager in process_message(s)

This change only modifies Bitcoin Core's internal fuzz testing harnesses (tools used to automatically find bugs during development). It registers the peer manager with the validation signal system during fuzz tests so that more code paths …

b5037688by Eugene Siegel+7−22 files
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Informational 12 AI analysisMessage 83 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

fuzz: add subtest for re-downloading a previously pruned block

This commit adds a new test case to an existing fuzz test. Fuzz tests are automated tools that feed random or semi-random inputs to a program to find crashes or bugs. The new test simulates re-downloading a block that was previously pruned…

db2d39f6by Eugene Siegel+19−01 file
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Low 49 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: fix use-after-free with v2->v1 reconnection logic

This commit fixes a memory-handling bug that occurs when Bitcoin Core shuts down its network connections. A list of pending reconnections held references to a memory resource (semaphore) that was freed during shutdown. When the program lat…

use-after-free in shutdown pathdestructor accesses freed semaphore memorymissing cleanup of m_reconnections before semaphore destruction
167df7a9by Eugene Siegel+6−22 files
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Informational 15 AI analysisMessage 72 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: change log rate limit version gate from 299900 to 290100

This is a one-line change in Bitcoin Core's internal test framework. It adjusts the version number at which the test suite starts passing a '-nologratelimit' option to tested nodes, lowering the gate from an unreleased future version (2999…

7b544341by Eugene Siegel+1−11 file
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Low 44 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

net: check for empty header before calling FillBlock

This change fixes a bug in how Bitcoin Core handles repeated compact-block transaction messages from peers. In debug builds, receiving multiple blocktxn messages for the same block could trigger an internal consistency check (Assume) crash…

Debug-only assertion crash (Assume) reachable via P2P message handlingRepeated blocktxn messages for same block can trigger null-header dereference/lookupPeer misbehavior handling added to reject duplicate compact-block reconstruction attempts
5e585a0fby Eugene Siegel+13−01 file
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Informational 15 AI analysisMessage 87 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: send duplicate blocktxn message in p2p_compactblocks.py

This commit only adds a new test to Bitcoin Core's test suite. It verifies that a Bitcoin node correctly disconnects a peer that sends an unexpected duplicate 'blocktxn' message after a compact block reconstruction already failed. There is…

Test-only change: no production code modifiedCovers existing peer-disconnect behavior for duplicate blocktxn after failed compact-block reconstructionNo memory safety, cryptographic, or consensus changes present in diff
8b626476by Eugene Siegel+42−01 file
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Informational 15 AI analysisMessage 80 · Strong
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

test: modify logging_filesize_rate_limit params

This commit only changes a test file. It makes a unit test for log-rate-limiting run faster and more reliably by reducing the amount of test data and extending the time window. There is no change to the actual Bitcoin Core software that us…

5dda364cby Eugene Siegel+16−171 file
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Informational 22 AI analysisMessage 68 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

config: add DEBUG_ONLY -logratelimit

This commit adds a hidden debug-only command-line option that lets users turn off a recently-introduced log rate limiter. By default the rate limiter stays on, so normal users are not affected. The change is mainly useful for developers ru…

Adds a toggle for a defensive control (log rate limiting) intended to mitigate disk-filling attacksOption is marked DEBUG_ONLY, reducing exposure to production deploymentsDefault remains enabled, preserving existing defensive posture
5c74a0b3by Eugene Siegel+12−44 files
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Informational 17 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

log: clean up LogPrintStr_ and Reset, prefix all logs with "[*]" when there are suppressions

This is a small cleanup change to Bitcoin Core's internal logging code. It fixes a minor bug where a '[*]' indicator that warns operators some log messages are being suppressed was only shown in one specific case, and now shows it whenever…

Logging-only change with no input parsing, network, or cryptographic code modifiedNo change to consensus, validation, wallet, or P2P logicSeverity raised from Info to Warning for dropped-bytes notification (improved operator visibility)
e8f9c37aby Eugene Siegel+12−101 file
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Informational 15 AI analysisMessage 73 · Adequate
BC Bitcoin CoreBitcoin Core BitcoinSupply chain

log: change LogLimitStats to struct LogRateLimiter::Stats

This commit is a straightforward internal code cleanup in Bitcoin Core's logging system. It renames a helper class and moves it inside another class, with no change to how log rate-limiting behaves. There is no security issue here.

3c7cae49by Eugene Siegel+39−563 files
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