[LU-6755] Kernel update for RHEL7.1 3.10.0-229.7.2.el7

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: Yang Sheng
• Reporter: Yang Sheng

Description

• It was found that the Linux kernel's implementation of vectored pipe read
  and write functionality did not take into account the I/O vectors that were
  already processed when retrying after a failed atomic access operation,
  potentially resulting in memory corruption due to an I/O vector array
  overrun. A local, unprivileged user could use this flaw to crash the system
  or, potentially, escalate their privileges on the system. (CVE-2015-1805,
  Important)

• A race condition flaw was found in the way the Linux kernel keys
  management subsystem performed key garbage collection. A local attacker
  could attempt accessing a key while it was being garbage collected, which
  would cause the system to crash. (CVE-2014-9529, Moderate)

• A flaw was found in the way the Linux kernel's 32-bit emulation
  implementation handled forking or closing of a task with an 'int80' entry.
  A local user could potentially use this flaw to escalate their privileges
  on the system. (CVE-2015-2830, Low)

• It was found that the Linux kernel's ISO file system implementation did
  not correctly limit the traversal of Rock Ridge extension Continuation
  Entries (CE). An attacker with physical access to the system could use this
  flaw to trigger an infinite loop in the kernel, resulting in a denial of
  service. (CVE-2014-9420, Low)

• An information leak flaw was found in the way the Linux kernel's ISO9660
  file system implementation accessed data on an ISO9660 image with RockRidge
  Extension Reference (ER) records. An attacker with physical access to the
  system could use this flaw to disclose up to 255 bytes of kernel memory.
  (CVE-2014-9584, Low)

• A flaw was found in the way the nft_flush_table() function of the Linux
  kernel's netfilter tables implementation flushed rules that were
  referencing deleted chains. A local user who has the CAP_NET_ADMIN
  capability could use this flaw to crash the system. (CVE-2015-1573, Low)

• An integer overflow flaw was found in the way the Linux kernel randomized
  the stack for processes on certain 64-bit architecture systems, such as
  x86-64, causing the stack entropy to be reduced by four. (CVE-2015-1593,
  Low)

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

1175235 - CVE-2014-9420 Kernel: fs: isofs: infinite loop in CE record entries
1179813 - CVE-2014-9529 kernel: use-after-free during key garbage collection
1180119 - CVE-2014-9584 kernel: isofs: unchecked printing of ER records
1190966 - CVE-2015-1573 kernel: panic while flushing nftables rules that reference deleted chains.
1192519 - CVE-2015-1593 kernel: Linux stack ASLR implementation Integer overflow
1202855 - CVE-2015-1805 kernel: pipe: iovec overrun leading to memory corruption
1208598 - CVE-2015-2830 kernel: int80 fork from 64-bit tasks mishandling