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OpenBSD Journal
The OpenBSD Community.

OpenBSD Journal
  • Michael W. Lucas' Sudo Talk Online

    Michael W. Lucas, author of Absolute OpenBSD, SSH Mastery, and Sudo Mastery (among others!) has given a talk, titled "Sudo: You're Doing it Wrong", now online:

    It runs just over an hour, so make sure you bring a snack!

  • Dec 10th Errata

    Ted Unangst (tedu@) has announced the availability of patches for three separate issues.

    The first errata addresses the recent DNS server issue

    Three new errata to announce.

    Malicious DNS servers could cause a denial of service with an endless series of delegations. This affects named (BIND) and unbound. There is a patch for unbound in 5.6. (unbound wasn't built in 5.5.) We don't have patches for BIND at this time.

    Missing memory barriers (and other bugs) made virtio devices unreliable. Patches available for 5.5 and 5.6.

    Lots and lots of security bugs in the X server have finally been fixed. http://www.x.org/wiki/Development/Security/Advisory-2014-12-09/ Patches are available for 5.5 and 5.6.

    For 5.6: http://www.openbsd.org/errata56.html
    http://ftp.openbsd.org/pub/OpenBSD/patches/5.6/common/012_unbound.patch.sig
    http://ftp.openbsd.org/pub/OpenBSD/patches/5.6/common/013_virtio.patch.sig
    http://ftp.openbsd.org/pub/OpenBSD/patches/5.6/common/014_xserver.patch.sig

    For 5.5: http://www.openbsd.org/errata55.html
    http://ftp.openbsd.org/pub/OpenBSD/patches/5.5/common/018_virtio.patch.sig
    http://ftp.openbsd.org/pub/OpenBSD/patches/5.5/common/019_xserver.patch.sig



  • Libressl 2.1.2 released.
    Brent Cook writes to tech@openbsd.org:
    We have released LibreSSL 2.1.2, which will be arriving in the LibreSSL directory of your local OpenBSD mirror soon.
    Read more...

  • memcpy vs memmove
    Ted Unangst (tedu@) took the time to write up a short history of the trials and tribulations that have accompanied the recent attention being paid to the memcpy(3) and memmove(3) routines:

    memcpy vs memmove

    A few notes about memcpy vs memmove and some related items as well.

    memcpy

    The C standard specifies two functions for copying memory regions, memcpy and memmove. The important difference is that it is undefined behavior to call memcpy with overlapping regions. One must use memmove for that. As the names imply, memcpy copies data from one region to another, while memmove moves data within a region. (It’s also perfectly acceptable to memmove between different regions.)

    This subtle but important distinction allows memcpy to be optimized more aggressively. In the case of memmove between overlapping regions, care must be taken not to destroy the contents of the source before they are done copying. This is easiest to see with a naive implementation of a copy loop.

    Read the whole thing; it's an exciting journey into the world of bug-hunting!


FUG-BR - Espalhando BSD
Dicas Rápidas:

/etc/make.conf:

SUP_UPDATE=YES
SUPHOST=\
    cvsup.br.FreeBSD.org
SUPFILE=/seu/supfile

# cd /usr/src
# make update
# cd /usr/ports
# make update

 






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