RHBA-2013:0184 - Bug Fix Advisory

Topic

Updated kernel packages that fix three bugs are now available for Red Hat
Enterprise Linux 6 Extended Update Support.

Description

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

This update fixes the following bugs:

• Previously, the IP over Infiniband (IPoIB) driver maintained state information

about neighbors on the network by attaching it to the core network's neighbor
structure. However, due to a race condition between the freeing of the core
network neighbor struct and the freeing of the IPoIB network struct, a use after
free condition could happen, resulting in either a kernel oops or 4 or 8 bytes
of kernel memory being zeroed when it was not supposed to be. These patches
decouple the IPoIB neighbor struct from the core networking stack's neighbor
struct so that there is no race between the freeing of one and the freeing of
the other. (BZ#880083)

• Previously, the HP Smart Array, or hpsa, driver used target reset. However, HP

Smart Array logical drives do not support target reset. Therefore, if the target
reset failed, the logical drive was taken offline with a file system error. The
hpsa driver has been updated to use LUN reset instead of target reset, which is
supported by these drives. (BZ#884421)

• Previously, the xdr routines in NFS version 2 and 3 conditionally updated the

res->count variable. Read retry attempts after a short NFS read() call could
fail to update the res->count variable, resulting in truncated read data being
returned. With this update, the res->count variable is updated unconditionally,
thus preventing this bug. (BZ#891563)

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

Solution

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.

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/knowledge/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 i386
• Red Hat Enterprise Linux Server - AUS 6.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.2 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.2 ppc64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 i386
• Red Hat Storage 2.0 x86_64
• Red Hat Gluster Storage Server for On-premise 2.0 x86_64
• Red Hat Storage for Public Cloud (via RHUI) 2.0 x86_64

Fixes

CVEs

(none)

References

(none)