xref: /freebsd-11.0-release/release/doc/en_US.ISO8859-1/errata/article.xml

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<article>
  <articleinfo>
    <title>&os;
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    Errata</title>

    <corpauthor>
    The &os; Project
    </corpauthor>

    <pubdate>$FreeBSD: head/release/doc/en_US.ISO8859-1/errata/article.sgml 125606 2004-02-08 22:16:29Z bmah $</pubdate>

    <copyright>
      <year>2000</year>
      <year>2001</year>
      <year>2002</year>
      <year>2003</year>
      <year>2004</year>
      <holder role="mailto:doc@FreeBSD.org">The FreeBSD Documentation Project</holder>
    </copyright>

    <legalnotice id="trademarks" role="trademarks">
      &tm-attrib.freebsd;
      &tm-attrib.intel;
      &tm-attrib.sparc;
      &tm-attrib.general;
    </legalnotice>
  </articleinfo>

  <abstract>
    <para>This document lists errata items for &os; 
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      containing significant information discovered after the release
      or too late in the release cycle to be otherwise included in the
      release documentation.
      This information includes security advisories, as well as news
      relating to the software or documentation that could affect its
      operation or usability.  An up-to-date version of this document
      should always be consulted before installing this version of
      &os;.</para>

    <para>This errata document for &os; 
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      will be maintained until the release of &os; &release.next;.</para>
  </abstract>

  <sect1 id="intro">
    <title>Introduction</title>

    <para>This errata document contains <quote>late-breaking news</quote>
      about &os;
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      Before installing this version, it is important to consult this
      document to learn about any post-release discoveries or problems
      that may already have been found and fixed.</para>

    <para>Any version of this errata document actually distributed
      with the release (for example, on a CDROM distribution) will be
      out of date by definition, but other copies are kept updated on
      the Internet and should be consulted as the <quote>current
      errata</quote> for this release.  These other copies of the
      errata are located at <ulink
      url="http://www.FreeBSD.org/releases/"></ulink>, plus any sites
      which keep up-to-date mirrors of this location.</para>

    <para>Source and binary snapshots of &os; &release.branch; also
      contain up-to-date copies of this document (as of the time of
      the snapshot).</para>

    <para>For a list of all &os; CERT security advisories, see <ulink
      url="http://www.FreeBSD.org/security/"></ulink> or <ulink
      url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/"></ulink>.</para>

  </sect1>

  <sect1 id="security">
    <title>Security Advisories</title>

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    <para>No advisories.</para>
]]>

<![ %release.type.snapshot [

    <para>(30 Jan 2004) A bug in &man.mksnap.ffs.8; causes the creation of a
      filesystem snapshot to reset the flags on the filesystem to
      their default values.  The possible consequences depend on local
      usage, but can include disabling extended access control lists
      or enabling the use of setuid executables stored on an untrusted
      filesystem.  This bug also affects the &man.dump.8;
      <option>-L</option> option, which uses &man.mksnap.ffs.8;.  Note
      that &man.mksnap.ffs.8; is normally only available to the
      superuser and members of the <groupname>operator</groupname>
      group.  This bug has been fixed on the &os; &release.current;
      security fix branch.  For more information, see security advisory <ulink
      url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-04:01.mksnap_ffs.asc">FreeBSD-SA-04:01</ulink>.</para>

    <para>(8 Feb 2004) A bug with the System V Shared Memory interface
      (specifically the &man.shmat.2; system call)
      can cause a shared memory segment to reference
      unallocated kernel memory.  In turn, this can permit a local
      attacker to gain unauthorized access to parts of kernel memory,
      possibly resulting in disclosure of sensitive information,
      bypass of access control mechanisms, or privilege escalation.
      More details, including bugfix and workaround information,
      can be found in security advisory <ulink
      url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-04:02.shmat.asc">FreeBSD-SA-04:02</ulink>.</para>

]]>

  </sect1>

  <sect1 id="open-issues">
    <title>Open Issues</title>

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    <para>No open issues.</para>
]]>

<![ %release.type.snapshot [

    <para>(9 Jan 2004) Due to a change in &man.cpp.1; behavior, the
      login screen for &man.xdm.1; is in black and white, even on
      systems with color displays.  As a workaround, update to a newer
      version of the 
      <filename role="package">x11/XFree86-4-clients</filename>
      port/package.</para>

    <para>(9 Jan 2004) There remain some residual problems with ACPI.
      In some cases, systems may behave erratically, or hang at boot
      time.  As a workaround, disable ACPI, using the <quote>safe
      mode</quote> option of the bootloader or using the
      <varname>hint.acpi.0.disabled</varname> kernel environment
      variable.  These problems are being investigated.  For problems
      that have not already been reported (check the mailing list
      archives <emphasis>before</emphasis> posting), sending the
      output of &man.dmesg.8; and &man.acpidump.8; to the
      &a.current; may help diagnose the problem.</para>

    <para>(9 Jan 2004) In some cases, ATA devices may behave
      erratically, particularly SATA devices.  Reported symptoms
      include command timeouts or missing interrupts.  These problems
      appear to be timing-dependent, making them rather difficult to
      isolate.  Workarounds include:</para>

    <itemizedlist>
      <listitem>
	<para>Turn off ATA DMA using the <quote>safe mode</quote>
	  option of the bootloader or the
	  <varname>hw.ata.ata_dma</varname> sysctl variable.</para>
      </listitem>

      <listitem>
	<para>Use the host's BIOS setup options to put the ATA
	  controller in its <quote>legacy mode</quote>, if
	  available.</para>
      </listitem>

      <listitem>
	<para>Disable ACPI, for example using the <quote>safe mode</quote>
	  option of the bootloader or using the
	  <varname>hint.acpi.0.disabled</varname> kernel environment
	  variable.</para>
      </listitem>
    </itemizedlist>

    <para>(9 Jan 2004) Installing over NFS when using the install
      floppies requires that the <filename>nfsclient.ko</filename>
      module be manually loaded from the third floppy disk.  This can
      be done by following the prompts when &man.sysinstall.8;
      launches to load a driver off of the third floppy disk.</para>

    <para>(9 Jan 2004) The use of multiple vchans (virtual audio
      channels with dynamic mixing in software) in the &man.pcm.4;
      driver has been known to cause some instability.</para>

    <para>(10 Jan 2004) Although APIC interrupt routing seems to work
      correctly on many systems, on some others (such as some laptops)
      it can cause various errors, such as &man.ata.4; errors or hangs
      when starting or exiting X11.  For these situations, it may be
      advisable to disable APIC routing, using the <quote>safe
      mode</quote> of the bootloader or the
      <varname>hint.apic.0.disabled</varname> loader tunable.  Note
      that disabling APIC is not compatible with SMP systems.</para>

    <para>(10 Jan 2004) The NFSv4 client may panic when attempting an
      NFSv4 operation against an NFSv3/NFSv2-only server.  This
      problem has been fixed with revision 1.4 of
      <filename>src/sys/rpc/rpcclnt.c</filename> in &os;
      &release.current;.</para>

    <para>(11 Jan 2004) Some problems have been encountered when using
      third-party NSS modules, such as <filename>nss_ldap</filename>,
      and groups with large membership lists.  These have been fixed
      with revision 1.2 of <filename>src/include/nss.h</filename> and
      revision 1.2 of
      <filename>src/lib/libc/net/nss_compat.c</filename> in &os;
      &release.current;.</para>

    <para>(13 Jan 2004) The &os; &release.current; release notes
      incorrectly stated that <application>GCC</application> was a
      post-release GCC 3.3.3 snapshot.  They should have stated that
      GCC was a <emphasis>pre-release</emphasis> GCC 3.3.3
      snapshot.</para>

    <para>(13 Jan 2004) The <filename
      role="package">sysutils/kdeadmin3</filename> port/package has a
      bug in the <application>KUser</application> component that can
      cause deletion of the <username>root</username> user from the
      system password file.  Users are strongly urged to upgrade to
      version 3.1.4_1 of this port/package.</para>

    <para>(21 Jan 2004) Some bugs in the IPsec implementation imported
      from the KAME Project can result in memory objects being freed
      before all references to them were removed.  Reported symptoms
      include erratic behavior or kernel panics after flushing the
      Security Policy Database (SPD).  Some of these problems have
      been fixed in &os; &release.current; in rev. 1.31 of
      <filename>src/sys/netinet6/ipsec.c</filename>, rev. 1.136 of
      <filename>src/sys/netinet/in_pcb.c</filename>, and revs. 1.63
      and 1.64 of <filename>src/sys/netkey/key.c</filename>.  More
      information about these problems has been posted to the
      &a.current;, in particular the thread entitled <ulink 
      url="http://lists.FreeBSD.org/pipermail/freebsd-current/2004-January/thread.html#18084">
      <quote>[PATCH] IPSec fixes</quote></ulink>.</para>

]]>

  </sect1>

  <sect1 id="late-news">
    <title>Late-Breaking News</title>

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    <para>No news.</para>
]]>

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    <para>(10 Jan 2004) The TCP implementation in &os; now includes
      protection against a certain class of TCP MSS resource
      exhaustion attacks, in the form of limits on the size and rate
      of TCP segments.  The first limit sets the minimum allowed
      maximum TCP segment size, and is controlled by the
      <varname>net.inet.tcp.minmss</varname> sysctl variable (the
      default value is <literal>216</literal> bytes).  The second
      limit is set by the
      <varname>net.inet.tcp.minmssoverload</varname> variable, and
      controls the maximum rate of connections whose average segment
      size is less than <varname>net.inet.tcp.minmss</varname>.
      Connections exceeding this packet rate are reset and dropped.
      Because this feature was added late in the &release.prev;
      release cycle, connection rate limiting is disabled by default,
      but can be enabled manually by assigning a non-zero value to
      <varname>net.inet.tcp.minmssoverload</varname> (the default
      value in &release.current; at the time of this writing is
      <literal>1000</literal> packets per second).</para>

]]>

  </sect1>

</article>