#21362: Intermittent crash when selected guard lacks a descriptor or routerstatus
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Reporter: teor | Owner:
Type: defect | Status: new
Priority: Medium | Milestone: Tor: 0.3.0.x-final
Component: Core Tor/Tor | Version: Tor: 0.3.0.2-alpha
Severity: Major | Keywords: crash guard tor-relay
Actual Points: | Parent ID:
Points: 1 | Reviewer:
Sponsor: |
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I see this crash when running make test-network-all with the latest
master:
{{{
Feb 01 16:53:22.000 [info] choose_good_exit_server_general(): Chose exit
server '$65B77ACB2E202F610D3D7D12CA7BA1269C945DEB~test002r at 127.0.0.1'
Feb 01 16:53:22.000 [debug] extend_info_from_node(): using 127.0.0.1:5002
for test002r
Feb 01 16:53:22.000 [info] extend_info_from_node(): Including Ed25519 ID
for $65B77ACB2E202F610D3D7D12CA7BA1269C945DEB~test002r at 127.0.0.1
Feb 01 16:53:22.000 [debug] onion_extend_cpath(): Path is 0 long; we want
3
Feb 01 16:53:22.000 [info] select_entry_guard_for_circuit(): Selected
primary guard test000a ($02C177E1A8001A62F9476B8BCFC80B6A7F45AFB8) for
circuit.
Feb 01 16:53:22.000 [err] tor_assertion_failed_(): Bug:
src/or/circuitbuild.c:2372: onion_extend_cpath: Assertion info || client
failed; aborting. (on Tor 0.3.0.2-alpha-dev 6dd7e66019e9aa53)
Feb 01 16:53:22.000 [err] Bug: Assertion info || client failed in
onion_extend_cpath at src/or/circuitbuild.c:2372. Stack trace: (on Tor
0.3.0.2-alpha-dev 6dd7e66019e9aa53)
Feb 01 16:53:22.000 [err] Bug: 0 tor
0x000000010872ad34 log_backtrace + 68 (on Tor 0.3.0.2-alpha-dev
6dd7e66019e9aa53)
}}}
It appears that this check in extend_info_from_node is failing:
{{{
if (node->ri == NULL && (node->rs == NULL || node->md == NULL))
return NULL;
}}}
We really shouldn't be selecting a guard unless it passes this test.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21362>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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