[tor-bugs] #27381 [Core Tor/Tor]: Bad consensus diffs on 0.3.4 and later
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Wed Aug 29 12:43:59 UTC 2018
#27381: Bad consensus diffs on 0.3.4 and later
------------------------------+--------------------------------
Reporter: teor | Owner: teor
Type: defect | Status: assigned
Priority: Medium | Milestone: Tor: 0.3.4.x-final
Component: Core Tor/Tor | Version:
Severity: Normal | Keywords: tor-auth, 034-must
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
------------------------------+--------------------------------
An 0.3.4 authority triggered this error on another authority:
{{{
Summary: nodes
Detail: chutney/tools/warnings.sh /Users/base/chutney/net/nodes.1535545138
Warning: Could not apply consensus diff received from server
'127.0.0.1:7001' Number: 1
Warning: Expected:
D086F055796593B54352BA551F2CFC59A7CB9CE1C0E0BDC339C7B16BEB233D41; found:
C81D53C1D18C0889500FB727B40C69E4716D7E9C8F3D8731D0F43B2F44BC03B1 Number: 1
Warning: Refusing to apply consensus diff because the base consensus
doesn't match the digest as found in the consensus diff header. Number: 1
}}}
But the authority that delivered the bad consensus diff seems fine:
{{{
Aug 29 22:19:16.813 [notice] Time to vote.
Aug 29 22:19:16.817 [notice] Choosing valid-after time in vote as
2018-08-29 12:19:20: consensus_set=1, last_interval=10
Aug 29 22:19:16.834 [notice] Vote posted.
Aug 29 22:19:16.847 [notice] Uploaded a vote to dirserver 127.0.0.1:7002
Aug 29 22:19:16.855 [notice] Uploaded a vote to dirserver 127.0.0.1:7003
Aug 29 22:19:16.857 [notice] Uploaded a vote to dirserver 127.0.0.1:7000
Aug 29 22:19:17.818 [notice] Time to fetch any votes that we're missing.
Aug 29 22:19:18.700 [notice] Got a signature from 127.0.0.1. Queuing it
for the next consensus.
Aug 29 22:19:18.822 [notice] Time to compute a consensus.
Aug 29 22:19:18.826 [notice] Computed bandwidth weights for Case 2b1
(Wgg=weight_scale, Wmd=Wgd) with v10: G=1 M=1 E=1 D=1 T=4
Aug 29 22:19:18.829 [notice] Bandwidth-weight Case 1 is verified and
valid.
Aug 29 22:19:18.835 [notice] Computed bandwidth weights for Case 2b1
(Wgg=weight_scale, Wmd=Wgd) with v10: G=1 M=1 E=1 D=1 T=4
Aug 29 22:19:18.840 [notice] Bandwidth-weight Case 1 is verified and
valid.
Aug 29 22:19:18.843 [notice] Added a signature for test000a from pending.
Aug 29 22:19:18.850 [notice] Added 2 pending signatures while building
consensus.
Aug 29 22:19:18.850 [notice] Consensus computed; uploading signature(s)
Aug 29 22:19:18.855 [notice] Signature(s) posted.
Aug 29 22:19:18.865 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7002
Aug 29 22:19:18.867 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7003
Aug 29 22:19:18.880 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7000
Aug 29 22:19:19.177 [notice] Got a signature from 127.0.0.1. Adding it to
the pending consensus.
Aug 29 22:19:19.179 [notice] Added a signature for test003aOLD from
127.0.0.1.
Aug 29 22:19:19.228 [notice] Got a signature from 127.0.0.1. Adding it to
the pending consensus.
Aug 29 22:19:19.229 [notice] Added a signature for test002aOLD from
127.0.0.1.
Aug 29 22:19:19.828 [notice] Time to fetch any signatures that we're
missing.
Aug 29 22:19:20.829 [notice] Time to publish the consensus and discard old
votes
Aug 29 22:19:20.835 [notice] Published ns consensus
Aug 29 22:19:20.854 [notice] Published microdesc consensus
Aug 29 22:19:26.839 [notice] Time to vote.
}}}
As does the authority that received the bad diff, until it gets the diff:
{{{
Aug 29 22:19:17.146 [notice] Time to vote.
Aug 29 22:19:17.150 [notice] Choosing valid-after time in vote as
2018-08-29 12:19:20: consensus_set=1, last_interval=10
Aug 29 22:19:17.160 [notice] Vote posted.
Aug 29 22:19:17.174 [notice] Uploaded a vote to dirserver 127.0.0.1:7000
Aug 29 22:19:17.175 [notice] Uploaded a vote to dirserver 127.0.0.1:7001
Aug 29 22:19:17.178 [notice] Uploaded a vote to dirserver 127.0.0.1:7002
Aug 29 22:19:18.146 [notice] Time to fetch any votes that we're missing.
Aug 29 22:19:18.703 [notice] Got a signature from 127.0.0.1. Queuing it
for the next consensus.
Aug 29 22:19:18.861 [notice] Got a signature from 127.0.0.1. Queuing it
for the next consensus.
Aug 29 22:19:19.146 [notice] Time to compute a consensus.
Aug 29 22:19:19.149 [notice] Computed bandwidth weights for Case 2b1
(Wgg=weight_scale, Wmd=Wgd) with v10: G=1 M=1 E=1 D=1 T=4
Aug 29 22:19:19.151 [notice] Bandwidth-weight Case 1 is verified and
valid.
Aug 29 22:19:19.154 [notice] Computed bandwidth weights for Case 2b1
(Wgg=weight_scale, Wmd=Wgd) with v10: G=1 M=1 E=1 D=1 T=4
Aug 29 22:19:19.156 [notice] Bandwidth-weight Case 1 is verified and
valid.
Aug 29 22:19:19.158 [notice] Added a signature for test000a from pending.
Aug 29 22:19:19.162 [notice] Added a signature for test001a from pending.
Aug 29 22:19:19.166 [notice] Added 4 pending signatures while building
consensus.
Aug 29 22:19:19.167 [notice] Consensus computed; uploading signature(s)
Aug 29 22:19:19.170 [notice] Signature(s) posted.
Aug 29 22:19:19.181 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7002
Aug 29 22:19:19.194 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7001
Aug 29 22:19:19.198 [notice] Uploaded signature(s) to dirserver
127.0.0.1:7000
Aug 29 22:19:19.231 [notice] Got a signature from 127.0.0.1. Adding it to
the pending consensus.
Aug 29 22:19:19.232 [notice] Added a signature for test002aOLD from
127.0.0.1.
Aug 29 22:19:20.146 [notice] Time to fetch any signatures that we're
missing.
Aug 29 22:19:21.148 [notice] Time to publish the consensus and discard old
votes
Aug 29 22:19:21.152 [notice] Published ns consensus
Aug 29 22:19:21.158 [notice] Published microdesc consensus
Aug 29 22:19:21.180 [warn] Refusing to apply consensus diff because the
base consensus doesn't match the digest as found in the consensus diff
header.
Aug 29 22:19:21.181 [warn] Expected:
D086F055796593B54352BA551F2CFC59A7CB9CE1C0E0BDC339C7B16BEB233D41; found:
C81D53C1D18C0889500FB727B40C69E4716D7E9C8F3D8731D0F43B2F44BC03B1
Aug 29 22:19:21.181 [warn] Could not apply consensus diff received from
server '127.0.0.1:7001'
Aug 29 22:19:27.147 [notice] Time to vote.
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27381>
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