• [FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-21:14.pms

    From FreeBSD Errata Notices@21:1/5 to All on Thu May 27 02:00:00 2021
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    ============================================================================= FreeBSD-EN-21:14.pms Errata Notice
    The FreeBSD Project

    Topic: pms(4) data corruption

    Category: core
    Module: pms
    Announced: 2021-05-26
    Affects: FreeBSD 12.2 and later.
    Corrected: 2021-04-23 01:05:42 UTC (stable/13, 13.0-STABLE)
    2021-05-26 19:30:23 UTC (releng/13.0, 13.0-RELEASE-p1)
    2021-04-23 01:11:07 UTC (stable/12, 12.2-STABLE)
    2021-05-26 20:40:15 UTC (releng/12.2, 12.2-RELEASE-p7)

    For general information regarding FreeBSD Errata Notices and Security Advisories, including descriptions of the fields above, security
    branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>.

    I. Background

    pms(4) is a driver for PMC-Sierra disk controllers.

    II. Problem Description

    Two problems are fixed by this update.

    First, the pms(4) driver did not correctly handle the new kern.maxphys
    value set in FreeBSD 13.0. The devices supported by the driver impose a
    limit on the maximum I/O size, and this limit is smaller than the new
    default.

    Second, the pms(4) driver did not correctly handle some error cases in
    the I/O path and would falsely report success to upper layers.

    III. Impact

    The bugs may cause data corruption.

    IV. Workaround

    No workaround is available. Systems not using pms(4) are unaffected.

    V. Solution

    Upgrade your system to a supported FreeBSD stable or release / security
    branch (releng) dated after the correction date and reboot.

    Perform one of the following:

    1) To update your system via a binary patch:

    Systems running a RELEASE version of FreeBSD on the amd64, i386, or
    (on FreeBSD 13 and later) arm64 platforms can be updated via the freebsd-update(8) utility:

    # freebsd-update fetch
    # freebsd-update install
    # shutdown -r +10min "Rebooting for an erratum update"

    2) To update your system via a source code patch:

    The following patches have been verified to apply to the applicable
    FreeBSD release branches.

    a) Download the relevant patch from the location below, and verify the
    detached PGP signature using your PGP utility.

    [FreeBSD 13.0]
    # fetch https://security.FreeBSD.org/patches/EN-21:14/pms.13.patch
    # fetch https://security.FreeBSD.org/patches/EN-21:14/pms.13.patch.asc
    # gpg --verify pms.13.patch.asc

    [FreeBSD 12.2]
    # fetch https://security.FreeBSD.org/patches/EN-21:14/pms.12.patch
    # fetch https://security.FreeBSD.org/patches/EN-21:14/pms.12.patch.asc
    # gpg --verify pms.12.patch.asc

    b) Apply the patch. Execute the following commands as root:

    # cd /usr/src
    # patch < /path/to/patch

    c) Recompile your kernel as described in <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
    system.

    VI. Correction details

    This issue is corrected by the corresponding Git commit hash or Subversion revision number in the following stable and release branches:

    Branch/path Hash Revision
    - ------------------------------------------------------------------------- stable/13/ 6514cb18d94e stable/13-n245322 releng/13.0/ b62d492067ba releng/13.0-n244736 stable/12/ r369655 releng/12.2/ r369861
    - -------------------------------------------------------------------------

    For FreeBSD 13 and later:

    Run the following command to see which files were modified by a
    particular commit:

    # git show --stat <commit hash>

    Or visit the following URL, replacing NNNNNN with the hash:

    <URL:https://cgit.freebsd.org/src/commit/?id=NNNNNN>

    To determine the commit count in a working tree (for comparison against
    nNNNNNN in the table above), run:

    # git rev-list --count --first-parent HEAD

    For FreeBSD 12 and earlier:

    Run the following command to see which files were modified by a particular revision, replacing NNNNNN with the revision number:

    # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

    Or visit the following URL, replacing NNNNNN with the revision number:

    <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

    VII. References

    The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-21:14.pms.asc> -----BEGIN PGP SIGNATURE-----

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