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Informational 15 Bitcoin

Allow stdin fuzz targets to suppress logs

Public commit record

What the developer wrote

Authored by Joost Jager

78/100 · Adequate
Allow stdin fuzz targets to suppress logs

Add an environment-variable switch that lets stdin fuzz targets use the
dev-null test logger. This keeps direct invocations verbose by default,
while external runners can opt into quieter passing-case replays.
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Mentions testing or verification
The short version

What changed, and why it matters

This change is a developer convenience tweak for the project's internal fuzz-testing programs. It adds an environment variable switch (LDK_FUZZ_SUPPRESS_LOGS) that lets automated fuzzing runs stay quiet, while keeping normal manual runs verbose. It does not touch any production Lightning node code, wallet logic, or network handling, and it does not fix or introduce any security vulnerability.

Recommended action

No security action needed. This is a benign test-infrastructure change. Reviewers may verify that the DevNull logger is already used safely elsewhere in the test suite and that no production code paths are affected.

Security signals we found

01

No changes to production library code

02

No changes to parsing, serialization, or cryptographic code

03

Only affects fuzz target harness logging behavior

04

No memory safety, input validation, or logic changes

Risk score

Why this scored 15/100

Our methodology →
Potential impact 0/30
Exploitability 0/25
Stealth signal 0/15
Affected reach 0/15
Confidence 10/10
Evidence quality 5/5
Human-validated context

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