[tor-talk] Tor 0.4.4.3-alpha is released

[Nick Mathewson <nickm@xxxxxxxxxxxxxx>]

Hi, all!

There's a new alpha Tor release! Because it's an alpha, you should
only run it if you're ready to find more bugs than usual, and report
them on trac.torproject.org.

The source code is available from the download page at
https://www.torproject.org/download/tor/ ; if you build Tor from
source, why not give it a try? And if you don't build Tor from source,
packages should be ready over the coming days, with a Tor Browser
alpha release likely by mid-August.

Here's what's new:

Changes in version 0.4.4.3-alpha - 2020-07-27
  Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
  including one affecting NSS users, and several affecting the Linux
  seccomp2 sandbox.

  o Major features (fallback directory list):
    - Replace the 148 fallback directories originally included in Tor
      0.4.1.4-rc (of which around 105 are still functional) with a list
      of 144 fallbacks generated in July 2020. Closes ticket 40061.

  o Major bugfixes (NSS):
    - When running with NSS enabled, make sure that NSS knows to expect
      nonblocking sockets. Previously, we set our TCP sockets as
      nonblocking, but did not tell NSS, which in turn could lead to
      unexpected blocking behavior. Fixes bug 40035; bugfix
      on 0.3.5.1-alpha.

  o Minor bugfixes (linux seccomp2 sandbox):
    - Fix a regression on sandboxing rules for the openat() syscall. The
      fix for bug 25440 fixed the problem on systems with glibc >= 2.27
      but broke with versions of glibc. We now choose a rule based on
      the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
      bugfix on 0.3.5.11.
    - Makes the seccomp sandbox allow the correct syscall for opendir
      according to the running glibc version. This fixes crashes when
      reloading torrc with sandbox enabled when running on glibc 2.15 to
      2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
      on 0.3.5.11.

  o Minor bugfixes (relay, usability):
    - Adjust the rules for when to warn about having too many
      connections to other relays. Previously we'd tolerate up to 1.5
      connections per relay on average. Now we tolerate more connections
      for directory authorities, and raise the number of total
      connections we need to see before we warn. Fixes bug 33880; bugfix
      on 0.3.1.1-alpha.

  o Documentation:
    - Replace most http:// URLs in our code and documentation with
      https:// URLs. (We have left unchanged the code in src/ext/, and
      the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.

  o Removed features:
    - Our "check-local" test target no longer tries to use the
      Coccinelle semantic patching tool parse all the C files. While it
      is a good idea to try to make sure Coccinelle works on our C
      before we run a Coccinelle patch, doing so on every test run has
      proven to be disruptive. You can still run this tool manually with
      "make check-cocci". Closes ticket 40030.
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