b735a9d213
Fix an integer overflow in computing the size of a temporary buffer can result in a buffer which is too small for the requested operation. [13:09] Fix a bug that could lead to kernel memory disclosure with SCTP state cookie. [13:10] Add latest errata notices: Fix a data corruption problem with mfi(4) operating on > 2TB disks in a JBOD. [EN-13:03]
109 lines
3.5 KiB
Text
109 lines
3.5 KiB
Text
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=============================================================================
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FreeBSD-EN-13:03.mfi Errata Notice
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The FreeBSD Project
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Topic: data corruption with mfi(4) JBOD disks > 2TB
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Category: contrib
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Module: mfi
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Announced: 2013-08-22
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Credits: Steven Hartland, Doug Ambrisko
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Affects: FreeBSD 9.1
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Corrected: 2012-12-03 18:37:02 UTC (stable/9, 9.1-STABLE)
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2013-08-22 00:51:48 UTC (releng/9.1, 9.1-RELEASE-p6)
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For general information regarding FreeBSD Errata Notices and Security
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Advisories, including descriptions of the fields above, security
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branches, and the following sections, please visit
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<URL:http://security.freebsd.org/>.
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I. Background
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The mfi(4) driver supports LSI's next generation PCI Express SAS RAID
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controllers. The driver supports JBOD attachment through /dev/mfisyspd?
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device nodes.
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Logical block addressing (LBA) is a common scheme used for specifying the
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location of sectors on hard drives.
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II. Problem Description
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The way mfi(4) implements access of "syspd" or also known as JBOD always
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uses READ10/WRITE10 commands for underlying disk. When writing over 2^32
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sectors, the LBA would wrap and starts writing at the beginning of the
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disk.
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III. Impact
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Writing beyond 2TB to mfi(4) connected JBODs would result in data corruption.
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IV. Workaround
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No workaround is available, but systems that do not use mfi(4) as a JBOD
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HBA or do not have disks with 2^32 or more sectors (2^41 or more bytes with
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512-byte logical sector size) are not affected.
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V. Solution
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Perform one of the following:
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1) Upgrade your system to a supported FreeBSD stable or release / security
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branch (releng) dated after the correction date.
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2) To update your present system via a source code patch:
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The following patches have been verified to apply to the applicable
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FreeBSD release branches.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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# fetch http://security.FreeBSD.org/patches/EN-13:03/mfi.patch
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# fetch http://security.FreeBSD.org/patches/EN-13:03/mfi.patch.asc
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# gpg --verify mfi.patch.asc
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b) Apply the patch.
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# cd /usr/src
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# patch < /path/to/patch
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c) Recompile your kernel as described in
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<URL:http://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
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system.
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3) To update your system via a binary patch:
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Systems running a RELEASE version of FreeBSD on the i386 or amd64
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platforms can be updated via the freebsd-update(8) utility:
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# freebsd-update fetch
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# freebsd-update install
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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in FreeBSD.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/9/ r243824
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releng/9.1/ r254631
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- -------------------------------------------------------------------------
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VII. References
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http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/173291
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The latest revision of this Errata Notice is available at
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http://security.FreeBSD.org/advisories/FreeBSD-EN-13:03.mfi.asc
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