RHSA-2009:1670 - Security Advisory

Topic

Updated kernel packages that fix multiple security issues and several bugs
are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

Description

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security fixes:

• NULL pointer dereference flaws in the r128 driver. Checks to test if the

Concurrent Command Engine state was initialized were missing in private
IOCTL functions. An attacker could use these flaws to cause a local denial
of service or escalate their privileges. (CVE-2009-3620, Important)

• a NULL pointer dereference flaw in the NFSv4 implementation. Several

NFSv4 file locking functions failed to check whether a file had been opened
on the server before performing locking operations on it. A local user on a
system with an NFSv4 share mounted could possibly use this flaw to cause a
denial of service or escalate their privileges. (CVE-2009-3726, Important)

• a flaw in tcf_fill_node(). A certain data structure in this function was

not initialized properly before being copied to user-space. This could lead
to an information leak. (CVE-2009-3612, Moderate)

• unix_stream_connect() did not check if a UNIX domain socket was in the

shutdown state. This could lead to a deadlock. A local, unprivileged user
could use this flaw to cause a denial of service. (CVE-2009-3621, Moderate)

Knowledgebase DOC-20536 has steps to mitigate NULL pointer dereference
flaws.

Bug fixes:

• frequently changing a CPU between online and offline caused a kernel

panic on some systems. (BZ#545583)

• for the LSI Logic LSI53C1030 Ultra320 SCSI controller, read commands sent

could receive incorrect data, preventing correct data transfer. (BZ#529308)

• pciehp could not detect PCI Express hot plug slots on some systems.

(BZ#530383)

• soft lockups: inotify race and contention on dcache_lock. (BZ#533822,

BZ#537019)

• priority ordered lists are now used for threads waiting for a given

mutex. (BZ#533858)

• a deadlock in DLM could cause GFS2 file systems to lock up. (BZ#533859)
• use-after-free bug in the audit subsystem crashed certain systems when

running usermod. (BZ#533861)

• on certain hardware configurations, a kernel panic when the Broadcom

iSCSI offload driver (bnx2i.ko and cnic.ko) was loaded. (BZ#537014)

• qla2xxx: Enabled MSI-X, and correctly handle the module parameter to

control it. This improves performance for certain systems. (BZ#537020)

• system crash when reading the cpuaffinity file on a system. (BZ#537346)
• suspend-resume problems on systems with lots of logical CPUs, e.g. BX-EX.

(BZ#539674)

• off-by-one error in the legacy PCI bus check. (BZ#539675)
• TSC was not made available on systems with multi-clustered APICs. This

could cause slow performance for time-sensitive applications. (BZ#539676)

• ACPI: ARB_DISABLE now disabled on platforms that do not need it.

(BZ#539677)

• fix node to core and power-aware scheduling issues, and a kernel panic

during boot on certain AMD Opteron processors. (BZ#539678, BZ#540469,
BZ#539680, BZ#539682)

• APIC timer interrupt issues on some AMD Opteron systems prevented

achieving full power savings. (BZ#539681)

• general OProfile support for some newer Intel processors. (BZ#539683)
• system crash during boot when NUMA is enabled on systems using MC and

kernel-xen. (BZ#539684)

• on some larger systems, performance issues due to a spinlock. (BZ#539685)
• APIC errors when IOMMU is enabled on some AMD Opteron systems.

(BZ#539687)

• on some AMD Opteron systems, repeatedly taking a CPU offline then online

caused a system hang. (BZ#539688)

• I/O page fault errors on some systems. (BZ#539689)
• certain memory configurations could cause the kernel-xen kernel to fail

to boot on some AMD Opteron systems. (BZ#539690)

• NMI watchdog is now disabled for offline CPUs. (BZ#539691)
• duplicate directories in /proc/acpi/processor/ on BX-EX systems.

(BZ#539692)

• links did not come up when using bnx2x with certain Broadcom devices.

(BZ#540381)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.4 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.4 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.4 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.4 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 528868 - CVE-2009-3612 kernel: tcf_fill_node() infoleak due to typo in 9ef1d4c7
• BZ - 529227 - CVE-2009-3726 kernel: nfsv4: kernel panic in nfs4_proc_lock()
• BZ - 529308 - [5.4]The errata 28 fix on LSI53C1030 hasn't been included yet. [rhel-5.4.z]
• BZ - 529597 - CVE-2009-3620 kernel: r128 IOCTL NULL pointer dereferences when CCE state is uninitialised
• BZ - 529626 - CVE-2009-3621 kernel: AF_UNIX: Fix deadlock on connecting to shutdown socket
• BZ - 530383 - [5.3] PCIe hotplug slot detection failure [rhel-5.4.z]
• BZ - 533822 - CRM 1908390 - BUG: warning at fs/inotify.c:181/set_dentry_child_flags() [rhel-5.4.z]
• BZ - 533858 - threads on pthread_mutex_lock wake in fifo order, but posix specifies by priority [rhel-5.4.z]
• BZ - 533859 - dlm_recv deadlock under memory pressure while processing GFP_KERNEL locks. [rhel-5.4.z]
• BZ - 533861 - system crashes in audit_update_watch() [rhel-5.4.z]
• BZ - 537014 - Panic on boot when loading iscsid with broadcom NIC [rhel-5.4.z]
• BZ - 537019 - kernel: BUG: soft lockup with dcache_lock [rhel-5.4.z]
• BZ - 537020 - [QLogic 5.4.z bug] qla2xxx - enable MSI-X and correct/cleanup irq request code [rhel-5.4.z]
• BZ - 537346 - kernel: NULL pointer dereference in pci_bus_show_cpuaffinity() [rhel-5.4.z]
• BZ - 539675 - [Intel 5.5 FEAT] Add ability to access Nehalem uncore config space [rhel-5.4.z]
• BZ - 539676 - [Intel 5.5 FEAT] Support Intel multi-APIC-cluster systems [rhel-5.4.z]
• BZ - 539677 - [Intel 5.5 FEAT] ACPI: Disable ARB_DISABLE on platforms where it is not needed [rhel-5.4.z]
• BZ - 539678 - Fix node to core association [rhel-5.4.z]
• BZ - 539680 - Fix Power-aware scheduling [rhel-5.4.z]
• BZ - 539681 - Fix AMD erratum - server C1E [rhel-5.4.z]
• BZ - 539682 - Fix kernel panic while booting RHEL5 32-bit kernel [rhel-5.4.z]
• BZ - 539683 - [Intel 5.5 FEAT] Oprofile: Add support for arch perfmon - kernel component [rhel-5.4.z]
• BZ - 539684 - EXPERIMENTAL EX/MC: Fix Xen NUMA [rhel-5.4.z]
• BZ - 539685 - [Intel 5.5 FEAT] Fix spinlock issue which causes performance impact on large systems [rhel-5.4.z]
• BZ - 539687 - EXPERIMENTAL MC/EX: Fix APIC error IOMMU issues [rhel-5.4.z]
• BZ - 539688 - EXPERIMENTAL MC/EX: Issue when bringing CPU offline and online with 32-bit kernel [rhel-5.4.z]
• BZ - 539689 - EXPERIMENTAL EX/MC: AMD IOMMU Linux driver with latest BIOS has IO PAGE FAULTS [rhel-5.4.z]
• BZ - 539690 - EXPERIMENTAL MC/EX: Incorrect memory setup can cause Xen crash [rhel-5.4.z]
• BZ - 539691 - [Intel 5.5 BUG] NMI and Watchdog are not disabled on CPU when CPU is off-lined [rhel-5.4.z]
• BZ - 540381 - Broadcom Everest Dual port 10Gb with SFP+ (57711) NIC fails with no link [rhel-5.4.z]
• BZ - 540469 - EXPERIMENTAL EX/MC: Fix node to core issue [rhel-5.4.z]
• BZ - 545583 - kernel panic when doing cpu offline/online frequently on hp-dl785g5-01.rhts.eng.bos.redhat.com [rhel-5.4.z]

CVEs

• CVE-2009-3612
• CVE-2009-3621
• CVE-2009-3620
• CVE-2009-3726

References

• http://www.redhat.com/security/updates/classification/#important
• http://kbase.redhat.com/faq/docs/DOC-20536