RHBA-2011:1552 - Bug Fix Advisory

Topic

An updated dosfstools package that fixes various bugs is now available for Red
Hat Enterprise Linux 6.

Description

The dosfstools package contains a set of tools for creating and maintaining
FAT-type file systems. It includes the mkdosfs and dosfsck utilities, which make
and check MS-DOS FAT file systems on hard drives and floppy disks.

This updated dosfstools package includes fixes for the following bugs:

• Previously, when the dosfsck and the dosfslabel utilities were executed on the

IBM System z architecture using a FAT32 file system, they terminated with this
error message: "Logical sector size is zero". This was caused by unaligned
fields which were first byte-wise copied. With this fix, the fields are not
pre-copied any more, but are accessed the same way as on the i686 architecture.
(BZ#624596)

• The fsck.vfat utility terminated due to buffer overflow. This occurred when

checking a device with the corrupted VFAT file system if there were any chains
of orphaned clusters. The name of the newly created file that contained these
clusters was printed directly into the name field, which led to an out of
boundary write. The name is now printed into the buffer and individual parts are
then correctly copied into the appropriate field. (BZ#677789)

• The dosfslabel utility displayed an error message when labeling the FAT32 file

system due to some of its internal structures being initialized incorrectly. The
dosfslabel utility now reads the FAT file system first, which fixes the problem.
(BZ#688128)

• The mkfs.vfat utility did not correctly detect device partitions on RAID

devices. As a consequence, formatting failed with an error message. This was
caused by an invalid mask for the statbuf.st_rdev variable. The mask has been
fixed to be at least four bytes long and the problem no longer occurs.
(BZ#709266)

All users of dosfstools are advised to upgrade to this updated package, which
resolves these bugs.

Solution

Before applying this update, make sure that all previously-released errata
relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat
Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 624596 - dosfsck and dosfslabel are broken on s390x
• BZ - 677789 - fsck.vfat hangs during checking of VFAT if there are chains of orphaned clusters
• BZ - 688128 - dosfslabel shows problem when try to label it Seek to 114116076544:Invalid argument
• BZ - 709266 - Install UEFI RHEL 6.0 x86_64 on Sandy Bridge IRST RAID : format fail

CVEs

(none)

References

(none)