RHBA-2011:0806 - Bug Fix Advisory

Topic

Updated libpciaccess packages that fix two bugs are now available for Red Hat
Enterprise Linux 6.

Description

libpciaccess is a low level system library used to access PCI devices. It
provides this functionality for X.Org and virtualization layers.

This update fixes the following bugs:

• If pci_system_init/pci_system_cleanup was run twice (or more) in a row within

the one process, a double close() could occur on the config_fd variable. This
caused an error, as the FD associated with nullfd was closed by the second
pci_get_strings() call. That was because the pci_device_linux_sysfs_destroy()
failed to re-initialize the global 'config_fd' variable to -1 after closing it.
This patch adds a line to set config_fd to -1 after the closure, fixing the
issue. (BZ#675756)

• When the pci_system_init() function opened the /proc/mtrr file and saved its

file descriptor, then pci_system_cleanup() would fail to close the file
descriptor. This resulted in a leak of the FD. With this update, added to the
above bug's patch, the file descriptor is closed as expected. (BZ#675758)

All users of libpciaccess are advised to upgrade to these updated packages which
resolve these issues.

Solution

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

This update is available via the 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 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 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 675756 - Double close() on the global config_fd variable
• BZ - 675758 - Leak of /proc/mtrr file descriptor by pci_system_cleanup

CVEs

(none)

References

(none)