reflow the changelog
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ChangeLog
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ChangeLog
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Changes in version 0.3.2.8-rc - 2017-12-21
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Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite schedulers
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that had led servers under heavy load to overload their outgoing
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connections. All relay operators running earlier 0.3.2.x versions should
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upgrade. This version also includes a mitigation for over-full DESTROY
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queues leading to out-of-memory conditions: if it works, we will soon
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backport it to earlier release series.
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Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
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schedulers that had led servers under heavy load to overload their
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outgoing connections. All relay operators running earlier 0.3.2.x
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versions should upgrade. This version also includes a mitigation for
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over-full DESTROY queues leading to out-of-memory conditions: if it
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works, we will soon backport it to earlier release series.
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This is the second release candidate in the 0.3.2 series. If we find no
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new bugs or regression here, then the first stable 0.3.2 release will
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be nearly identical to this.
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This is the second release candidate in the 0.3.2 series. If we find
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no new bugs or regression here, then the first stable 0.3.2 release
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will be nearly identical to this.
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o Major bugfixes (KIST, scheduler):
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- The KIST scheduler did not correctly account for data already enqueued
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in each connection's send socket buffer, particularly in cases when the
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TCP/IP congestion window was reduced between scheduler calls. This
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situation lead to excessive per-connection buffering in the kernel, and
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a potential memory DoS. Fixes bug 24665; bugfix on 0.3.2.1-alpha.
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o Minor bugfixes (scheduler, KIST):
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- Use a sane write limit for KISTLite when writing onto a connection
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buffer instead of using INT_MAX and shoving as much as it can. Because
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the OOM handler cleans up circuit queues, we are better off at keeping
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them in that queue instead of the connection's buffer. Fixes bug 24671;
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bugfix on 0.3.2.1-alpha.
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- The KIST scheduler did not correctly account for data already
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enqueued in each connection's send socket buffer, particularly in
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cases when the TCP/IP congestion window was reduced between
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scheduler calls. This situation lead to excessive per-connection
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buffering in the kernel, and a potential memory DoS. Fixes bug
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24665; bugfix on 0.3.2.1-alpha.
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o Minor features (geoip):
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- Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
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Country database.
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o Minor bugfixes (hidden service v3):
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- Bump hsdir_spread_store parameter from 3 to 4 in order to increase the
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probability of reaching a service for a client missing microdescriptors.
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Fixes bug 24425; bugfix on 0.3.2.1-alpha.
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- Bump hsdir_spread_store parameter from 3 to 4 in order to increase
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the probability of reaching a service for a client missing
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microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
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o Minor bugfixes (memory usage):
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- When queuing DESTROY cells on a channel, only queue the
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circuit-id and reason fields: not the entire 514-byte
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cell. This fix should help mitigate any bugs or attacks that
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fill up these queues, and free more RAM for other uses. Fixes
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bug 24666; bugfix on 0.2.5.1-alpha.
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- When queuing DESTROY cells on a channel, only queue the circuit-id
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and reason fields: not the entire 514-byte cell. This fix should
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help mitigate any bugs or attacks that fill up these queues, and
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free more RAM for other uses. Fixes bug 24666; bugfix
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on 0.2.5.1-alpha.
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o Minor bugfixes (scheduler, KIST):
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- Use a sane write limit for KISTLite when writing onto a connection
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buffer instead of using INT_MAX and shoving as much as it can.
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Because the OOM handler cleans up circuit queues, we are better
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off at keeping them in that queue instead of the connection's
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buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
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Changes in version 0.3.2.7-rc - 2017-12-14
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