[LU-8615] kernel update [RHEL7.2 3.10.0-327.36.1.el7]

• 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 security flaw was found in the Linux kernel in the mark_source_chains()
  function in "net/ipv4/netfilter/ip_tables.c". It is possible for a user-supplied
  "ipt_entry" structure to have a large "next_offset" field. This field is not
  bounds checked prior to writing to a counter value at the supplied offset.
  (CVE-2016-3134, Important)

• A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit
  systems. This flaw will allow attackers to alter arbitrary kernel memory when
  unloading a kernel module. This action is usually restricted to root-privileged
  users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS
  and CONFIG_NET_NS and the user is granted elevated privileges. (CVE-2016-4997,
  Important)

• An out-of-bounds heap memory access leading to a Denial of Service, heap
  disclosure, or further impact was found in setsockopt(). The function call is
  normally restricted to root, however some processes with cap_sys_admin may also
  be able to trigger this flaw in privileged container environments.
  (CVE-2016-4998, Moderate)

Bug Fix(es):

• In some cases, running the ipmitool command caused a kernel panic due to a
  race condition in the ipmi message handler. This update fixes the race
  condition, and the kernel panic no longer occurs in the described scenario.
  (BZ#1353947)

• Previously, running I/O-intensive operations in some cases caused the system
  to terminate unexpectedly after a null pointer dereference in the kernel. With
  this update, a set of patches has been applied to the 3w-9xxx and 3w-sas drivers
  that fix this bug. As a result, the system no longer crashes in the described
  scenario. (BZ#1362040)

• Previously, the Stream Control Transmission Protocol (SCTP) sockets did not
  inherit the SELinux labels properly. As a consequence, the sockets were labeled
  with the unlabeled_t SELinux type which caused SCTP connections to fail. The
  underlying source code has been modified, and SCTP connections now works as
  expected. (BZ#1354302)

• Previously, the bnx2x driver waited for transmission completions when
  recovering from a parity event, which substantially increased the recovery time.
  With this update, bnx2x does not wait for transmission completion in the
  described circumstances. As a result, the recovery of bnx2x after a parity event
  now takes less time. (BZ#1351972)

Enhancement(s):

• With this update, the audit subsystem enables filtering of processes by name
  besides filtering by PID. Users can now audit by executable name (with the "-F
  exe=<path-to-executable>" option), which allows expression of many new audit
  rules. This functionality can be used to create events when specific
  applications perform a syscall. (BZ#1345774)

• With this update, the Nonvolatile Memory Express (NVMe) and the multi-queue
  block layer (blk_mq) have been upgraded to the Linux 4.5 upstream version.
  Previously, a race condition between timeout and freeing request in blk_mq
  occurred, which could affect the blk_mq_tag_to_rq() function and consequently a
  kernel oops could occur. The provided patch fixes this race condition by
  updating the tags with the active request. The patch simplifies
  blk_mq_tag_to_rq() and ensures that the two requests are not active at the same
  time. (BZ#1350352)

• The Hyper-V storage driver (storvsc) has been upgraded from upstream. This
  update provides moderate performance improvement of I/O operations when using
  storvscr for certain workloads. (BZ#1360161)

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

1317383 - CVE-2016-3134 kernel: netfilter: missing bounds check in ipt_entry structure
1349722 - CVE-2016-4997 kernel: compat IPT_SO_SET_REPLACE setsockopt
1349886 - CVE-2016-4998 kernel: out of bounds reads when processing IPT_SO_SET_REPLACE setsockopt

Comments

[Peter Jones]

Landed for 2.9

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/22608/
Subject: LU-8615 kernel: kernel update RHEL7.2 [3.10.0-327.36.1.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 5cc29d71f670c70db0bec05c50285fb55d15f6a4

[Gerrit Updater]

Bob Glossman ([e-mail]) uploaded a new patch: http://review.whamcloud.com/22608
Subject: LU-8615 kernel: kernel update RHEL7.2 [3.10.0-327.36.1.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6da55b695fe522cfdc70828dce7884535d775c8c