FreeBSD The Power to Serve

FreeBSD 10.1-RELEASE Errata


This document lists errata items for FreeBSD 10.1-RELEASE, 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 FreeBSD.

This errata document for FreeBSD 10.1-RELEASE will be maintained until the release of FreeBSD 10.2-RELEASE.


This errata document contains "late-breaking news" about FreeBSD 10.1-RELEASE 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.

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version of this errata document actually distributed with the release (for example, on a CDROM distribution) will be out of date by definition, but other copies are kept updated on the Internet and should be consulted as the "current errata" for this release. These other copies of the errata are located at, plus any sites which keep up-to-date mirrors of this location.

Source and binary snapshots of FreeBSD 10.1-STABLE also contain up-to-date copies of this document (as of the time of the snapshot).

For a list of all FreeBSD CERT security advisories, see or

Security Advisories

Advisory Date Topic


10 December 2014

Buffer overflow in stdio


10 December 2014

Multiple vulnerabilities in file(1) and libmagic(3)


17 December 2014

Remote denial of service vulnerability


23 December 2014

Multiple vulnerabilities in NTP suite


14 January 2015

Multiple vulnerabilities in OpenSSL


27 January 2015

SCTP kernel memory corruption and disclosure vulnerability


27 January 2015

SCTP stream reset vulnerability


25 February 2015

Integer overflow in IGMP protocol


19 March 2015

Multiple vulnerabilities


7 April 2015

Multiple vulnerabilities


7 April 2015

Insecure default GELI key file permissions


7 April 2015

Router advertisement Denial of Service


16 June 2015

Multiple vulnerabilities


9 July 2015

OpenSSL alternate chains certificate forgery vulnerability (Note: This does not affect FreeBSD 10.1-RELEASE)


21 July 2015

resource exhaustion due to sessions stuck in LAST_ACK state.


28 July 2015

Shell injection vulnerability


28 July 2015

resource exhaustion in TCP reassembly


28 July 2015

Multiple vulnerabilities


5 August 2015

Shell injection vulnerability


5 August 2015

Remote denial of service vulnerability

Errata Notices

Errata Date Topic


23 December 2014

Fixed directory deletion issue in freebsd-update(8)


25 February 2015

vt(4) crash with improper ioctl parameters


25 February 2015

OpenSSL update


25 February 2015

freebsd-update(8) updates libraries in suboptimal order


13 May 2015

freebsd-update(8) does not ensure the previous upgrade has completed


13 May 2015

Deadlock on reboot with UFS tuned with SU+J


9 June 2015

Multiple denial of service issues


9 June 2015

ZFS reliability improvements


30 June 2015 (revised)

Sendmail TLS/DH interoperability improvement


30 June 2015

Fix inconsistency between locale and rune locale states


30 June 2015

Improved iconv(3) UTF-7 support

Open Issues

  • FreeBSD/i386 10.1-RELEASE running as a guest operating system on VirtualBox can have a problem with disk I/O access. It depends on some specific hardware configuration and does not depend on a specific version of VirtualBox or host operating system.

    It causes various errors and makes FreeBSD quite unstable. Although the cause is still unclear, disabling unmapped I/O works as a workaround. To disable it, choose Escape to loader prompt in the boot menu and enter the following lines from loader(8) prompt, after an OK:

    set vfs.unmapped_buf_allowed=0

    Note that the following line has to be added to /boot/loader.conf after a boot. It disables unmapped I/O at every boot:


    [2014-04-03 update] It has been reported that instability may be present on virtual machines running on other hypervisors, such as Xen or KVM.

  • FreeBSD/i386 10.1-RELEASE configured with a multi-disk ZFS dataset (mirror, raidz1, raidz2, raidz3) may crash during boot when the ZFS pool mount is attempted while booting an unmodified GENERIC kernel.

    As described in /usr/src/UPDATING entry 20121223, rebuilding the kernel with options KSTACK_PAGES=4 has been observed to resolve the boot-time crash. This, however, is not an ideal solution for inclusion in the GENERIC kernel configuration, as increasing KSTACK_PAGES implicitly decreases available usermode threads in an environment that is already resource-starved.

    Taking into account the heavy resource requirements of ZFS, in addition to the i386-specific tuning requirements for general workloads, using ZFS with the FreeBSD/i386 GENERIC kernel is strongly discouraged.

    Warning: It is extremely important to take note that, by default, freebsd-update(8) will install the GENERIC kernel configuration, and as such, freebsd-update(8) consumers are strongly encouraged to avoid FreeBSD-provided kernel binary upgrades with such configurations.

    Note: Although there is slight change in how the crash manifests on FreeBSD/i386 between 10.0-RELEASE and 10.1-RELEASE, and given the date of the /usr/src/UPDATING entry, there is no evidence suggesting this is a regression between FreeBSD 10.0-RELEASE and FreeBSD 10.1-RELEASE directly.

  • Due to an incompatibility between bsdconfig(8) and pkg(8) version 1.3, packages included on the FreeBSD dvd installer will not be recognized by bsdconfig(8).

    To install packages from the dvd1.iso installer, create the /dist target directory, and manually mount the dvd1.iso ISO:

    # mkdir -p /dist
    # mount -t cd9660 /dev/cd0 /dist

    Note: Be sure to use the correct /dev device path for the dvd1.iso ISO installer.

    Next, set REPOS_DIR to the path of the repos/ directory within the installer so pkg(8) will use the correct repository metadata.

    If using sh(1):

    # export REPOS_DIR=/dist/packages/repos

    If using csh(1):

    # setenv REPOS_DIR /dist/packages/repos

    Note: Keep in mind that REPOS_DIR will need to be set again after the current shell session is terminated, if continuing to use the packages provided on the dvd1.iso installer.

    Finally, bootstrap pkg(8) from the ISO, and install required packages:

    # pkg bootstrap
    # pkg install xorg-server xorg gnome2 [...]
  • [2015-02-06] Affects binary upgrade users: The second phase of freebsd-update install, the phase where the running userland is upgraded, fails on systems deployed with nss_ldap enabled in nsswitch.conf(5) when upgrading from 10.0-RELEASE to 10.1-RELEASE.

A workaround is to disable nss_ldap in nsswitch.conf(5) prior to running freebsd-update install to upgrade the userland, after which it can be enabled again when the upgrade process is completed.

The problem is being investigated, and an Errata Notice is expected to be issued when a solution to the problem is identified.

  • [2015-03-31] Several reports were received regarding the QCOW2 FreeBSD virtual machine images crashing on boot. As result of this, these images have been removed from the FTP mirrors, and the hashes removed from CHECKSUM.SHA256 and CHECKSUM.MD5 in the VM-IMAGES/ directory on the FTP mirrors.

Late-Breaking News

No news.

Last modified on: January 26, 2021 by Sergio Carlavilla Delgado