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- Changes in version 0.2.5.5-alpha - 2014-06-18
- Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
- 0.2.5.x release series, including a couple of DoS issues, some
- performance regressions, a large number of bugs affecting the Linux
- seccomp2 sandbox code, and various other bugfixes. It also adds
- diagnostic bugfixes for a few tricky issues that we're trying to
- track down.
- o Major features (security, traffic analysis resistance):
- - Several major improvements to the algorithm used to decide when to
- close TLS connections. Previous versions of Tor closed connections
- at a fixed interval after the last time a non-padding cell was
- sent over the connection, regardless of the target of the
- connection. Now, we randomize the intervals by adding up to 50% of
- their base value, we measure the length of time since connection
- last had at least one circuit, and we allow connections to known
- ORs to remain open a little longer (15 minutes instead of 3
- minutes minimum). These changes should improve Tor's resistance
- against some kinds of traffic analysis, and lower some overhead
- from needlessly closed connections. Fixes ticket 6799.
- Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
- o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
- - Fix a memory leak that could occur if a microdescriptor parse
- fails during the tokenizing step. This bug could enable a memory
- exhaustion attack by directory servers. Fixes bug 11649; bugfix
- on 0.2.2.6-alpha.
- o Major bugfixes (security, directory authorities):
- - Directory authorities now include a digest of each relay's
- identity key as a part of its microdescriptor.
- This is a workaround for bug 11743 (reported by "cypherpunks"),
- where Tor clients do not support receiving multiple
- microdescriptors with the same SHA256 digest in the same
- consensus. When clients receive a consensus like this, they only
- use one of the relays. Without this fix, a hostile relay could
- selectively disable some client use of target relays by
- constructing a router descriptor with a different identity and the
- same microdescriptor parameters and getting the authorities to
- list it in a microdescriptor consensus. This fix prevents an
- attacker from causing a microdescriptor collision, because the
- router's identity is not forgeable.
- o Major bugfixes (relay):
- - Use a direct dirport connection when uploading non-anonymous
- descriptors to the directory authorities. Previously, relays would
- incorrectly use tunnel connections under a fairly wide variety of
- circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
- - When a circuit accidentally has the same circuit ID for its
- forward and reverse direction, correctly detect the direction of
- cells using that circuit. Previously, this bug made roughly one
- circuit in a million non-functional. Fixes bug 12195; this is a
- bugfix on every version of Tor.
- o Major bugfixes (client, pluggable transports):
- - When managing pluggable transports, use OS notification facilities
- to learn if they have crashed, and don't attempt to kill any
- process that has already exited. Fixes bug 8746; bugfix
- on 0.2.3.6-alpha.
- o Minor features (diagnostic):
- - When logging a warning because of bug 7164, additionally check the
- hash table for consistency (as proposed on ticket 11737). This may
- help diagnose bug 7164.
- - When we log a heartbeat, log how many one-hop circuits we have
- that are at least 30 minutes old, and log status information about
- a few of them. This is an attempt to track down bug 8387.
- - When encountering an unexpected CR while writing text to a file on
- Windows, log the name of the file. Should help diagnosing
- bug 11233.
- - Give more specific warnings when a client notices that an onion
- handshake has failed. Fixes ticket 9635.
- - Add significant new logging code to attempt to diagnose bug 12184,
- where relays seem to run out of available circuit IDs.
- - Improve the diagnostic log message for bug 8387 even further to
- try to improve our odds of figuring out why one-hop directory
- circuits sometimes do not get closed.
- o Minor features (security, memory management):
- - Memory allocation tricks (mempools and buffer freelists) are now
- disabled by default. You can turn them back on with
-
- disabling these features because malloc performance is good enough
- on most platforms, and a similar feature in OpenSSL exacerbated
- exploitation of the Heartbleed attack. Resolves ticket 11476.
- o Minor features (security):
- - Apply the secure SipHash-2-4 function to the hash table mapping
- circuit IDs and channels to circuits. We missed this one when we
- were converting all the other hash functions to use SipHash back
- in 0.2.5.3-alpha. Resolves ticket 11750.
- o Minor features (build):
- - The configure script has a
- support for libseccomp on systems that have it, in case it (or
- Tor's use of it) is broken. Resolves ticket 11628.
- o Minor features (other):
- - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
- Country database.
- o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
- - When running a hidden service, do not allow TunneledDirConns 0;
- this will keep the hidden service from running, and also
- make it publish its descriptors directly over HTTP. Fixes bug 10849;
- bugfix on 0.2.1.1-alpha.
- o Minor bugfixes (performance):
- - Avoid a bug where every successful connection made us recompute
- the flag telling us whether we have sufficient information to
- build circuits. Previously, we would forget our cached value
- whenever we successfully opened a channel (or marked a router as
- running or not running for any other reason), regardless of
- whether we had previously believed the router to be running. This
- forced us to run an expensive update operation far too often.
- Fixes bug 12170; bugfix on 0.1.2.1-alpha.
- - Avoid using tor_memeq() for checking relay cell integrity. This
- removes a possible performance bottleneck. Fixes part of bug
- 12169; bugfix on 0.2.1.31.
- o Minor bugfixes (compilation):
- - Fix compilation of test_status.c when building with MVSC. Bugfix
- on 0.2.5.4-alpha. Patch from Gisle Vanem.
- - Resolve GCC complaints on OpenBSD about discarding constness in
- TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
- on 0.1.1.23. Patch from Dana Koch.
- - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
- treatment of long and time_t as comparable types. Fixes part of
- bug 11633. Patch from Dana Koch.
- - Make Tor compile correctly with
- 11623; bugfix on 0.2.5.3-alpha.
- - When deciding whether to build the 64-bit curve25519
- implementation, detect platforms where we can compile 128-bit
- arithmetic but cannot link it. Fixes bug 11729; bugfix on
- 0.2.4.8-alpha. Patch from "conradev".
- - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
- bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
- - Fix compilation with dmalloc. Fixes bug 11605; bugfix
- on 0.2.4.10-alpha.
- o Minor bugfixes (Directory server):
- - When sending a compressed set of descriptors or microdescriptors,
- make sure to finalize the zlib stream. Previously, we would write
- all the compressed data, but if the last descriptor we wanted to
- send was missing or too old, we would not mark the stream as
- finished. This caused problems for decompression tools. Fixes bug
- 11648; bugfix on 0.1.1.23.
- o Minor bugfixes (Linux seccomp sandbox):
- - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
- 11622; bugfix on 0.2.5.1-alpha.
- - Avoid crashing when re-opening listener ports with the seccomp
- sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
- - Avoid crashing with the seccomp sandbox enabled along with
- ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
- - When we receive a SIGHUP with the sandbox enabled, correctly
- support rotating our log files. Fixes bug 12032; bugfix
- on 0.2.5.1-alpha.
- - Avoid crash when running with sandboxing enabled and
- DirReqStatistics not disabled. Fixes bug 12035; bugfix
- on 0.2.5.1-alpha.
- - Fix a "BUG" warning when trying to write bridge-stats files with
- the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
- on 0.2.5.1-alpha.
- - Prevent the sandbox from crashing on startup when run with the
-
- 11477; bugfix on 0.2.5.4-alpha.
- - When running with DirPortFrontPage and sandboxing both enabled,
- reload the DirPortFrontPage correctly when restarting. Fixes bug
- 12028; bugfix on 0.2.5.1-alpha.
- - Don't try to enable the sandbox when using the Tor binary to check
- its configuration, hash a passphrase, or so on. Doing so was
- crashing on startup for some users. Fixes bug 11609; bugfix
- on 0.2.5.1-alpha.
- - Avoid warnings when running with sandboxing and node statistics
- enabled at the same time. Fixes part of 12064; bugfix on
- 0.2.5.1-alpha. Patch from Michael Wolf.
- - Avoid warnings when running with sandboxing enabled at the same
- time as cookie authentication, hidden services, or directory
- authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
- - Do not allow options that require calls to exec to be enabled
- alongside the seccomp2 sandbox: they will inevitably crash. Fixes
- bug 12043; bugfix on 0.2.5.1-alpha.
- - Handle failures in getpwnam()/getpwuid() when running with the
- User option set and the Linux syscall sandbox enabled. Fixes bug
- 11946; bugfix on 0.2.5.1-alpha.
- - Refactor the getaddrinfo workaround that the seccomp sandbox uses
- to avoid calling getaddrinfo() after installing the sandbox
- filters. Previously, it preloaded a cache with the IPv4 address
- for our hostname, and nothing else. Now, it loads the cache with
- every address that it used to initialize the Tor process. Fixes
- bug 11970; bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (pluggable transports):
- - Enable the ExtORPortCookieAuthFile option, to allow changing the
- default location of the authentication token for the extended OR
- Port as used by sever-side pluggable transports. We had
- implemented this option before, but the code to make it settable
- had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
- - Avoid another 60-second delay when starting Tor in a pluggable-
- transport-using configuration when we already have cached
- descriptors for our bridges. Fixes bug 11965; bugfix
- on 0.2.3.6-alpha.
- o Minor bugfixes (client):
- - Avoid "Tried to open a socket with DisableNetwork set" warnings
- when starting a client with bridges configured and DisableNetwork
- set. (Tor launcher starts Tor with DisableNetwork set the first
- time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
- o Minor bugfixes (testing):
- - The Python parts of the test scripts now work on Python 3 as well
- as Python 2, so systems where '/usr/bin/python' is Python 3 will
- no longer have the tests break. Fixes bug 11608; bugfix
- on 0.2.5.2-alpha.
- - When looking for versions of python that we could run the tests
- with, check for "python2.7" and "python3.3"; previously we were
- only looking for "python", "python2", and "python3". Patch from
- Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
- - Fix all valgrind warnings produced by the unit tests. There were
- over a thousand memory leak warnings previously, mostly produced
- by forgetting to free things in the unit test code. Fixes bug
- 11618, bugfixes on many versions of Tor.
- o Minor bugfixes (tor-fw-helper):
- - Give a correct log message when tor-fw-helper fails to launch.
- (Previously, we would say something like "tor-fw-helper sent us a
- string we could not parse".) Fixes bug 9781; bugfix
- on 0.2.4.2-alpha.
- o Minor bugfixes (relay, threading):
- - Check return code on spawn_func() in cpuworker code, so that we
- don't think we've spawned a nonworking cpuworker and write junk to
- it forever. Fix related to bug 4345; bugfix on all released Tor
- versions. Found by "skruffy".
- - Use a pthread_attr to make sure that spawn_func() cannot return an
- error while at the same time launching a thread. Fix related to
- bug 4345; bugfix on all released Tor versions. Reported
- by "cypherpunks".
- o Minor bugfixes (relay, oom prevention):
- - Correctly detect the total available system memory. We tried to do
- this in 0.2.5.4-alpha, but the code was set up to always return an
- error value, even on success. Fixes bug 11805; bugfix
- on 0.2.5.4-alpha.
- o Minor bugfixes (relay, other):
- - We now drop CREATE cells for already-existent circuit IDs and for
- zero-valued circuit IDs, regardless of other factors that might
- otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
- on 0.0.8pre1.
- - Avoid an illegal read from stack when initializing the TLS module
- using a version of OpenSSL without all of the ciphers used by the
- v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
- by "starlight".
- - When rejecting DATA cells for stream_id zero, still count them
- against the circuit's deliver window so that we don't fail to send
- a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
- o Minor bugfixes (logging):
- - Fix a misformatted log message about delayed directory fetches.
- Fixes bug 11654; bugfix on 0.2.5.3-alpha.
- - Squelch a spurious LD_BUG message "No origin circuit for
- successful SOCKS stream" in certain hidden service failure cases;
- fixes bug 10616.
- o Distribution:
- - Include a tor.service file in contrib/dist for use with systemd.
- Some distributions will be able to use this file unmodified;
- others will need to tweak it, or write their own. Patch from Jamie
- Nguyen; resolves ticket 8368.
- o Documentation:
- - Clean up several option names in the manpage to match their real
- names, add the missing documentation for a couple of testing and
- directory authority options, remove the documentation for a
- V2-directory fetching option that no longer exists. Resolves
- ticket 11634.
- - Correct the documenation so that it lists the correct directory
- for the stats files. (They are in a subdirectory called "stats",
- not "status".)
- - In the manpage, move more authority-only options into the
- directory authority section so that operators of regular directory
- caches don't get confused.
- o Package cleanup:
- - The contrib directory has been sorted and tidied. Before, it was
- an unsorted dumping ground for useful and not-so-useful things.
- Now, it is divided based on functionality, and the items which
- seemed to be nonfunctional or useless have been removed. Resolves
- ticket 8966; based on patches from "rl1987".
- o Removed code:
- - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
- and MTBF calculations, but that nobody was using. Fixes
- - The TunnelDirConns and PreferTunnelledDirConns options no longer
- exist; tunneled directory connections have been available since
- 0.1.2.5-alpha, and turning them off is not a good idea. This is a
- brute-force fix for 10849, where "TunnelDirConns 0" would break
- hidden services.
- Changes in version 0.2.4.22 - 2014-05-16
- Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
- alpha release series. These include blocking all authority signing
- keys that may have been affected by the OpenSSL "heartbleed" bug,
- choosing a far more secure set of TLS ciphersuites by default, closing
- a couple of memory leaks that could be used to run a target relay out
- of RAM, and several others.
- o Major features (security, backport from 0.2.5.4-alpha):
- - Block authority signing keys that were used on authorities
- vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
- don't have any evidence that these keys _were_ compromised; we're
- doing this to be prudent.) Resolves ticket 11464.
- o Major bugfixes (security, OOM):
- - Fix a memory leak that could occur if a microdescriptor parse
- fails during the tokenizing step. This bug could enable a memory
- exhaustion attack by directory servers. Fixes bug 11649; bugfix
- on 0.2.2.6-alpha.
- o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
- - The relay ciphersuite list is now generated automatically based on
- uniform criteria, and includes all OpenSSL ciphersuites with
- acceptable strength and forward secrecy. Previously, we had left
- some perfectly fine ciphersuites unsupported due to omission or
- typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
- 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
- - Relays now trust themselves to have a better view than clients of
- which TLS ciphersuites are better than others. (Thanks to bug
- 11513, the relay list is now well-considered, whereas the client
- list has been chosen mainly for anti-fingerprinting purposes.)
- Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
- CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
- AES128. Resolves ticket 11528.
- - Clients now try to advertise the same list of ciphersuites as
- Firefox 28. This change enables selection of (fast) GCM
- ciphersuites, disables some strange old ciphers, and stops
- advertising the ECDH (not to be confused with ECDHE) ciphersuites.
- Resolves ticket 11438.
- o Minor bugfixes (configuration, security):
- - When running a hidden service, do not allow TunneledDirConns 0:
- trying to set that option together with a hidden service would
- otherwise prevent the hidden service from running, and also make
- it publish its descriptors directly over HTTP. Fixes bug 10849;
- bugfix on 0.2.1.1-alpha.
- o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
- - Avoid sending a garbage value to the controller when a circuit is
- cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
- o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
- - Stop leaking memory when we successfully resolve a PTR record.
- Fixes bug 11437; bugfix on 0.2.4.7-alpha.
- o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
- - Avoid 60-second delays in the bootstrapping process when Tor is
- launching for a second time while using bridges. Fixes bug 9229;
- bugfix on 0.2.0.3-alpha.
- o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
- - Give the correct URL in the warning message when trying to run a
- relay on an ancient version of Windows. Fixes bug 9393.
- o Minor bugfixes (compilation):
- - Fix a compilation error when compiling with
- Fixes bug 9700; bugfix on 0.2.4.17-rc.
- o Minor bugfixes:
- - Downgrade the warning severity for the the "md was still
- referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
- for trying to diagnose this bug, and the current warning in
- earlier versions of tor achieves nothing useful. Addresses warning
- from bug 7164.
- o Minor features (log verbosity, backport from 0.2.5.4-alpha):
- - When we run out of usable circuit IDs on a channel, log only one
- warning for the whole channel, and describe how many circuits
- there were on the channel. Fixes part of ticket 11553.
- o Minor features (security, backport from 0.2.5.4-alpha):
- - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
- leave the default at 8GBytes), to better support Raspberry Pi
- users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
- o Documentation (backport from 0.2.5.4-alpha):
- - Correctly document that we search for a system torrc file before
- looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
- 0.2.3.18-rc.
- Changes in version 0.2.5.4-alpha - 2014-04-25
- Tor 0.2.5.4-alpha includes several security and performance
- improvements for clients and relays, including blacklisting authority
- signing keys that were used while susceptible to the OpenSSL
- "heartbleed" bug, fixing two expensive functions on busy relays,
- improved TLS ciphersuite preference lists, support for run-time
- hardening on compilers that support AddressSanitizer, and more work on
- the Linux sandbox code.
- There are also several usability fixes for clients (especially clients
- that use bridges), two new TransPort protocols supported (one on
- OpenBSD, one on FreeBSD), and various other bugfixes.
- This release marks end-of-life for Tor 0.2.2.x; those Tor versions
- have accumulated many known flaws; everyone should upgrade.
- o Major features (security):
- - If you don't specify MaxMemInQueues yourself, Tor now tries to
- pick a good value based on your total system memory. Previously,
- the default was always 8 GB. You can still override the default by
- setting MaxMemInQueues yourself. Resolves ticket 11396.
- - Block authority signing keys that were used on authorities
- vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
- don't have any evidence that these keys _were_ compromised; we're
- doing this to be prudent.) Resolves ticket 11464.
- o Major features (relay performance):
- - Speed up server-side lookups of rendezvous and introduction point
- circuits by using hashtables instead of linear searches. These
- functions previously accounted between 3 and 7% of CPU usage on
- some busy relays. Resolves ticket 9841.
- - Avoid wasting CPU when extending a circuit over a channel that is
- nearly out of circuit IDs. Previously, we would do a linear scan
- over possible circuit IDs before finding one or deciding that we
- had exhausted our possibilities. Now, we try at most 64 random
- circuit IDs before deciding that we probably won't succeed. Fixes
- a possible root cause of ticket 11553.
- o Major features (seccomp2 sandbox, Linux only):
- - The seccomp2 sandbox can now run a test network for multiple hours
- without crashing. The sandbox is still experimental, and more bugs
- will probably turn up. To try it, enable "Sandbox 1" on a Linux
- host. Resolves ticket 11351.
- - Strengthen sandbox code: the sandbox can now test the arguments
- for rename(), and blocks _sysctl() entirely. Resolves another part
- of ticket 11351.
- - When the sandbox blocks a system call, it now tries to log a stack
- trace before exiting. Resolves ticket 11465.
- o Major bugfixes (TLS cipher selection):
- - The relay ciphersuite list is now generated automatically based on
- uniform criteria, and includes all OpenSSL ciphersuites with
- acceptable strength and forward secrecy. Previously, we had left
- some perfectly fine ciphersuites unsupported due to omission or
- typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
- 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
- - Relays now trust themselves to have a better view than clients of
- which TLS ciphersuites are better than others. (Thanks to bug
- 11513, the relay list is now well-considered, whereas the client
- list has been chosen mainly for anti-fingerprinting purposes.)
- Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
- CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
- AES128. Resolves ticket 11528.
- - Clients now try to advertise the same list of ciphersuites as
- Firefox 28. This change enables selection of (fast) GCM
- ciphersuites, disables some strange old ciphers, and stops
- advertising the ECDH (not to be confused with ECDHE) ciphersuites.
- Resolves ticket 11438.
- o Major bugfixes (bridge client):
- - Avoid 60-second delays in the bootstrapping process when Tor is
- launching for a second time while using bridges. Fixes bug 9229;
- bugfix on 0.2.0.3-alpha.
- o Minor features (transparent proxy, *BSD):
- - Support FreeBSD's ipfw firewall interface for TransPort ports on
- FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
- 10267; patch from "yurivict".
- - Support OpenBSD's divert-to rules with the pf firewall for
- transparent proxy ports. To enable it, set "TransProxyType
- pf-divert". This allows Tor to run a TransPort transparent proxy
- port on OpenBSD 4.4 or later without root privileges. See the
- pf.conf(5) manual page for information on configuring pf to use
- divert-to rules. Closes ticket 10896; patch from Dana Koch.
- o Minor features (security):
- - New
- hardening options that consume nontrivial amounts of CPU and
- memory. Right now, this includes AddressSanitizer and UbSan, which
- are supported in newer versions of GCC and Clang. Closes ticket
- 11477.
- o Minor features (log verbosity):
- - Demote the message that we give when a flushing connection times
- out for too long from NOTICE to INFO. It was usually meaningless.
- Resolves ticket 5286.
- - Don't log so many notice-level bootstrapping messages at startup
- about downloading descriptors. Previously, we'd log a notice
- whenever we learned about more routers. Now, we only log a notice
- at every 5% of progress. Fixes bug 9963.
- - Warn less verbosely when receiving a malformed
- ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
- - When we run out of usable circuit IDs on a channel, log only one
- warning for the whole channel, and describe how many circuits
- there were on the channel. Fixes part of ticket 11553.
- o Minor features (relay):
- - If a circuit timed out for at least 3 minutes, check if we have a
- new external IP address, and publish a new descriptor with the new
- IP address if it changed. Resolves ticket 2454.
- o Minor features (controller):
- - Make the entire exit policy available from the control port via
- GETINFO exit-policy/*. Implements enhancement 7952. Patch from
- "rl1987".
- - Because of the fix for ticket 11396, the real limit for memory
- usage may no longer match the configured MaxMemInQueues value. The
- real limit is now exposed via GETINFO limits/max-mem-in-queues.
- o Minor features (bridge client):
- - Report a more useful failure message when we can't connect to a
- bridge because we don't have the right pluggable transport
- configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
- o Minor features (diagnostic):
- - Add more log messages to diagnose bug 7164, which causes
- intermittent "microdesc_free() called but md was still referenced"
- warnings. We now include more information, to figure out why we
- might be cleaning a microdescriptor for being too old if it's
- still referenced by a live node_t object.
- o Minor bugfixes (client, DNSPort):
- - When using DNSPort, try to respond to AAAA requests with AAAA
- answers. Previously, we hadn't looked at the request type when
- deciding which answer type to prefer. Fixes bug 10468; bugfix on
- 0.2.4.7-alpha.
- - When receiving a DNS query for an unsupported record type, reply
- with no answer rather than with a NOTIMPL error. This behavior
- isn't correct either, but it will break fewer client programs, we
- hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
- from "epoch".
- o Minor bugfixes (exit relay):
- - Stop leaking memory when we successfully resolve a PTR record.
- Fixes bug 11437; bugfix on 0.2.4.7-alpha.
- o Minor bugfixes (bridge client):
- - Stop accepting bridge lines containing hostnames. Doing so would
- cause clients to perform DNS requests on the hostnames, which was
- not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
- - Avoid a 60-second delay in the bootstrapping process when a Tor
- client with pluggable transports re-reads its configuration at
- just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
- o Minor bugfixes (client, logging during bootstrap):
- - Warn only once if we start logging in an unsafe way. Previously,
- we complain as many times as we had problems. Fixes bug 9870;
- bugfix on 0.2.5.1-alpha.
- - Only report the first fatal bootstrap error on a given OR
- connection. This stops us from telling the controller bogus error
- messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
- - Be more helpful when trying to run sandboxed on Linux without
- libseccomp. Instead of saying "Sandbox is not implemented on this
- platform", we now explain that we need to be built with
- libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
- - Avoid generating spurious warnings when starting with
- DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
- 0.2.3.9-alpha.
- o Minor bugfixes (closing OR connections):
- - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
- check if it's an or_connection_t and correctly call
- connection_or_close_for_error() rather than
- connection_mark_for_close() directly. Fixes bug 11304; bugfix on
- 0.2.4.4-alpha.
- - When closing all connections on setting DisableNetwork to 1, use
- connection_or_close_normally() rather than closing OR connections
- out from under the channel layer. Fixes bug 11306; bugfix on
- 0.2.4.4-alpha.
- o Minor bugfixes (controller):
- - Avoid sending a garbage value to the controller when a circuit is
- cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
- o Minor bugfixes (tor-fw-helper):
- - Allow tor-fw-helper to build again by adding src/ext to its
- CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
- o Minor bugfixes (bridges):
- - Avoid potential crashes or bad behavior when launching a
- server-side managed proxy with ORPort or ExtORPort temporarily
- disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
- o Minor bugfixes (platform-specific):
- - Fix compilation on Solaris, which does not have <endian.h>. Fixes
- bug 11426; bugfix on 0.2.5.3-alpha.
- - When dumping a malformed directory object to disk, save it in
- binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
- 0.2.2.1-alpha.
- - Don't report failures from make_socket_reuseable() on incoming
- sockets on OSX: this can happen when incoming connections close
- early. Fixes bug 10081.
- o Minor bugfixes (trivial memory leaks):
- - Fix a small memory leak when signing a directory object. Fixes bug
- 11275; bugfix on 0.2.4.13-alpha.
- - Free placeholder entries in our circuit table at exit; fixes a
- harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
- - Don't re-initialize a second set of OpenSSL mutexes when starting
- up. Previously, we'd make one set of mutexes, and then immediately
- replace them with another. Fixes bug 11726; bugfix on
- 0.2.5.3-alpha.
- - Resolve some memory leaks found by coverity in the unit tests, on
- exit in tor-gencert, and on a failure to compute digests for our
- own keys when generating a v3 networkstatus vote. These leaks
- should never have affected anyone in practice.
- o Minor bugfixes (hidden service):
- - Only retry attempts to connect to a chosen rendezvous point 8
- times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (misc code correctness):
- - Fix various instances of undefined behavior in channeltls.c,
- tor_memmem(), and eventdns.c that would cause us to construct
- pointers to memory outside an allocated object. (These invalid
- pointers were not accessed, but C does not even allow them to
- exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
- 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
- - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
- fix some miscellaneous errors in our tests and codebase. Fixes bug
- 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
- - Always check return values for unlink, munmap, UnmapViewOfFile;
- check strftime return values more often. In some cases all we can
- do is report a warning, but this may help prevent deeper bugs from
- going unnoticed. Closes ticket 8787; bugfixes on many, many tor
- versions.
- - Fix numerous warnings from the clang "scan-build" static analyzer.
- Some of these are programming style issues; some of them are false
- positives that indicated awkward code; some are undefined behavior
- cases related to constructing (but not using) invalid pointers;
- some are assumptions about API behavior; some are (harmlessly)
- logging sizeof(ptr) bytes from a token when sizeof
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