[ANNOUNCE] WireGuard Snapshot `0.0.20180620` Available

["Jason A. Donenfeld" <Jason@zx2c4.com>]

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Hello,

A new snapshot, `0.0.20180620`, has been tagged in the git repository.

Please note that this snapshot is, like the rest of the project at this point
in time, experimental, and does not consitute a real release that would be
considered secure and bug-free. WireGuard is generally thought to be fairly
stable, and most likely will not crash your computer (though it may).
However, as this is a pre-release snapshot, it comes with no guarantees, and
its security is not yet to be depended on; it is not applicable for CVEs.

With all that said, if you'd like to test this snapshot out, there are a
few relevent changes.

== Changes ==

  * chacha20poly1305: use slow crypto on -rt kernels on arm too
  
  Leftover from the last commit of the previous snapshot that we forgot to
  handle.
  
  * tools: getentropy requires macOS 10.12
  
  Small build time fixup for old versions of macOS.
  
  * queueing: remove useless spinlocks on sc
  * queueing: re-enable preemption periodically to lower latency
  * simd: encapsulate fpu amortization into nice functions
  * simd: no need to restore fpu state when no preemption
  
  This will improve general system latency on preempt-enabled systems, like
  desktops.
  
  * dns-hatchet: apply resolv.conf's selinux context to new resolv.conf
  
  Fixes wg-quick's dns hatchet on CentOS.
  
  * qemu: bump default kernel
  
  By bumping to 4.17.2, we actually uncovered a bug in the SLUB allocator, which
  upstream is now fixing: https://lkml.org/lkml/2018/6/18/1407
  
  * noise: take locks for ss precomputation
  * netlink: maintain static_identity lock over entire private key update
  
  Minor locking correctness fixes and optimizations.
  
  * noise: wait for crng before taking locks
  
  We now make sure that an outgoing packet which needs a potentially unseeded
  rng won't block a call to wg(8), which takes similar locks for retrieving
  data.
  
  * receive: drop handshake packets if rng is not initialized
  
  If the rng is unseeded, we drop incoming handshake packets, so that it's not
  possible for an attacker to fill the handshake queue thereby provoking
  cookies.
  
  * ratelimiter: mitigate reference underflow
  * ratelimiter: do not allow concurrent init and uninit
  
  Minor correctness and hardening fixes, which don't fix anything particular in
  WireGuard, but might be useful if our ratelimiter is ever used elsewhere.
  
  * compat: use stabler lkml links
  * poly1305: add missing string.h header
  
  Minor fixups.

This snapshot contains commits from: Jason A. Donenfeld.

As always, the source is available at https://git.zx2c4.com/WireGuard/ and
information about the project is available at https://www.wireguard.com/ .

This snapshot is available in tarball form here:
  https://git.zx2c4.com/WireGuard/snapshot/WireGuard-0.0.20180620.tar.xz
  SHA2-256: b4db98ea751c8e667454f98ea1c15d704a784fe1bc093b03bd64575418a7c242
  BLAKE2b-256: f4e5a65f384a04cb1202e2866afc52469f121acb092a06be270d13ed211efdec

If you're a snapshot package maintainer, please bump your package version. If
you're a user, the WireGuard team welcomes any and all feedback on this latest
snapshot.

Finally, WireGuard development thrives on donations. By popular demand, we
have a webpage for this: https://www.wireguard.com/donations/

Thank you,
Jason Donenfeld


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