[LU-8093] kernel update [RHEL6.7 2.6.32-573.26.1.el6]

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

Security Fix(es):

• A flaw was found in the way the Linux kernel handled IRET faults during the
  processing of NMIs. An unprivileged, local user could use this flaw to crash the
  system or, potentially (although highly unlikely), escalate their privileges on
  the system. (CVE-2015-5157, Moderate)

• A race condition flaw was found in the way the Linux kernel's SCTP
  implementation handled sctp_accept() during the processing of heartbeat timeout
  events. A remote attacker could use this flaw to prevent further connections to
  be accepted by the SCTP server running on the system, resulting in a denial of
  service. (CVE-2015-8767, Moderate)

Bug Fix(es):

• When the nvme driver held the queue lock for too long, for example during DMA
  mapping, a lockup occurred leading to nvme hard-lockup panic. This update fixes
  the underlying source code, and nvme now works as expected.(BZ#1314209)

• Due to a regression, a Unix domain datagram socket could come to a deadlock
  when sending a datagram to itself. The provided patch adds another "sk" check to
  the unix_dgram_sendmsg() function, and the aforementioned deadlock no longer
  occurs. (BZ#1315696)

• Previously, writing a large file using direct I/O in 16 MB chunks sometimes
  caused a pathological allocation pattern where 16 MB chunks of large free extent
  were allocated to a file in reversed order. The provided patch avoids the
  backward allocation, and writing a large file using direct I/O now proceeds
  successfully. (BZ#1320031)

• MD RAID1 devices that repeatedly became hot removed and re-added could become
  mismatched due to a race condition. This caused them to return stale data,
  leading to data corruption. The provided set of patches fixes this bug, and hot
  removals and re-additions of md devices now work as expected. (BZ#1320863)

• A couple of previous fixes caused a deadlock on the "rq" lock leading to a
  kernel panic on CPU 0. The provided set of patches reverts the relevant commits,
  thus preventing the panic from occurring. (BZ#1326043)

Enhancement(s):

• VLAN support has been updated to integrate some of the latest upstream
  features. This update also makes sure that Null pointer crashes related to VLAN
  support in bonding mode no longer occur and that tag stripping and insertion
  work as expected. (BZ#1315706)

• This update adds additional model numbers for Broadwell to perf. (BZ#1320035)

Bugs fixed (https://bugzilla.redhat.com/):

1259577 - CVE-2015-5157 kernel: x86-64: IRET faults during NMIs processing
1297389 - CVE-2015-8767 kernel: SCTP denial of service during timeout