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bind9/bin/tests/system/resend_loop
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Matthijs Mekking 4c22fa0d56 Reproducer forwarder resend loop 
Run malicious server: resend_loop/ans2/ans.py

Start BIND: ns1

Send single query to test.com

OBSERVED BEHAVIOR
The malicious server receives tens of thousands of resend packets
within seconds. CPU usage of the named worker thread remains elevated
(50–100% of one core) until the default fetch timeout (~10 seconds)
terminates the request. Instrumentation during testing confirmed that
isc_counter_used(fctx->qc) remains constant (value 1) throughout the
entire resend loop.
2026-06-18 08:49:23 +02:00
..
ans3 Reproducer forwarder resend loop 2026-06-18 08:49:23 +02:00
ns1 Reproducer forwarder resend loop 2026-06-18 08:49:23 +02:00
ns4 Update resend_loop_badcookie system test 2026-05-07 13:32:15 +02:00
tests_resend_loop.py Reproducer forwarder resend loop 2026-06-18 08:49:23 +02:00