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Reduce fingerprinting through timestamps in 'addr' messages.#5860

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laanwj merged 1 commit intobitcoin:masterfrom
sipa:addrfinger
Mar 17, 2015
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Reduce fingerprinting through timestamps in 'addr' messages.#5860
laanwj merged 1 commit intobitcoin:masterfrom
sipa:addrfinger

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@sipa
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@sipa sipa commented Mar 6, 2015

Suggested by @jonasnick.

@fanquake
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fanquake commented Mar 8, 2015

Travis failure

Cleaning up
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::lock_error> >'
  what():  boost: mutex lock failed in pthread_mutex_lock: Invalid argument
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::lock_error> >'
  what():  boost: mutex lock failed in pthread_mutex_lock: Invalid argument
*** glibc detected *** /home/travis/build/bitcoin/bitcoin/bitcoin-x86_64-unknown-linux-gnu/src/bitcoind: malloc(): memory corruption: 0x00007fd8131c3ab1 ***

@laanwj laanwj added this to the 0.10.0 milestone Mar 9, 2015
@laanwj laanwj added the P2P label Mar 9, 2015
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Diapolo commented Mar 9, 2015

@laanwj Isn't 0.10.0 released ;)? Why did you tag this 0.10.0 then?

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laanwj commented Mar 9, 2015

@Diapolo Don't be so pedantic, I'm using it as marker for the next version on the 0.10 branch.

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Diapolo commented Mar 9, 2015

@laanwj Just asking, no offense :).

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laanwj commented Mar 9, 2015

@Diapolo okay :)

@sipa @fanquake Tried a Travis respin, still same problem on same configuration.

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laanwj commented Mar 11, 2015

I'm also getting these errors when running the RPC tests locally with this patch:

bitcoind: /usr/include/boost/thread/pthread/recursive_mutex.hpp:110: void boost::recursive_mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.
bitcoind: /usr/include/boost/thread/pthread/recursive_mutex.hpp:110: void boost::recursive_mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.

This appears to be a problem with destruction order. By moving addrman.Connected(addr); to the CNode destructor, addrman is called when each node is deleted. This may cause a use-after-free of a mutex?

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jgarzik commented Mar 11, 2015

concept ACK

@sipa
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sipa commented Mar 11, 2015

Changed approach.

@jonasnick
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jonasnick commented Mar 11, 2015

To give a bit of context, without this PR it is possible to learn all outbound peers of a node by repeatedly sending 'getaddr' messages. See the histogram for the timestamps of a full node and a client client.

@sipa sipa force-pushed the addrfinger branch 2 times, most recently from 1880f2c to d88011e Compare March 12, 2015 13:01
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laanwj commented Mar 13, 2015

utACK

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laanwj reviewed Mar 16, 2015
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src/main.cpp Outdated
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This comment is no longer correct, should probably be Update the connected status for this node

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@sipa sipa Mar 17, 2015

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Done.

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jonasnick commented Mar 16, 2015

untested ack

@laanwj laanwj merged commit 9c27379 into bitcoin:master Mar 17, 2015
laanwj added a commit that referenced this pull request Mar 17, 2015
@laanwj
Merge pull request #5860
93a8c46 
9c27379 Reduce fingerprinting through timestamps in 'addr' messages. (Pieter Wuille)
sipa added a commit that referenced this pull request Mar 17, 2015
@sipa @laanwj
Reduce fingerprinting through timestamps in 'addr' messages.
ca301bf 
Suggested by Jonas Nick.

Rebased-From: 9c27379
Github-Pull: #5860
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laanwj commented Mar 17, 2015

Cherry-picked to 0.10 as ca301bf

laanwj added a commit that referenced this pull request Apr 6, 2015
@laanwj
doc: Credit Jonas Nick in release notes
149c1d8 
For discovering the vulnerability and discussing the fix that led to PR #5860.
@maflcko maflcko mentioned this pull request Jul 18, 2019
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reddink pushed a commit to reddcoin-project/reddcoin-3.10 that referenced this pull request Jul 11, 2020
@sipa @reddink
Reduce fingerprinting through timestamps in 'addr' messages.
bc820a9 
Suggested by Jonas Nick.

Rebased-From: 9c27379
Github-Pull: bitcoin#5860
(cherry picked from commit ca301bf)
reddink pushed a commit to reddcoin-project/reddcoin-3.10 that referenced this pull request Jul 14, 2020
@sipa @reddink
Reduce fingerprinting through timestamps in 'addr' messages.
5ddae18 
Suggested by Jonas Nick.

Rebased-From: 9c27379
Github-Pull: bitcoin#5860
(cherry picked from commit ca301bf)
@jnewbery jnewbery mentioned this pull request Aug 18, 2020
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@sipa @fanquake @Diapolo @laanwj @jgarzik @jonasnick