[LU-9236] new kernel [RHEL6.9 2.6.32-696.el6]

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

With the GA announcement of RHEL 6.9 on 3/21 we need to add content to lustre to allow building and running on it.

This ticket is intended to cover all the changes needed in the lustre tree for this brand new distro release. This includes new target and config files for the new kernel version, new or revised base kernel and ldiskfs patches, and small incremental changes to lbuild and autoconf.

Issue Links

• is related to: LU-9316 kernel update [RHEL6.9 2.6.32-696.1.1.el6]

Comments

[Peter Jones]

Landed for 2.10

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/26111/
Subject: LU-9236 kernel: new kernel RHEL 6.9 [2.6.32-696.el6]
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 738374be02d52ba10b44f4c4d4b335807eb48b46

[Gerrit Updater]

Bob Glossman ([e-mail]) uploaded a new patch: https://review.whamcloud.com/26111
Subject: LU-9236 kernel: new kernel RHEL 6.9 [2.6.32-696.el6]
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8c7d436efbf7c6dcfd7fca963a6334cdd284a482

[Bob Glossman (Inactive)]

Security Fix(es):

• It was discovered that a remote attacker could leverage the generation of IPv6
  atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow
  (in scenarios in which actual fragmentation of packets is not needed) and could
  subsequently perform any type of a fragmentation-based attack against legacy
  IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate)

• A flaw was discovered in the way the Linux kernel dealt with paging
  structures. When the kernel invalidated a paging structure that was not in use
  locally, it could, in principle, race against another CPU that is switching to a
  process that uses the paging structure in question. A local user could use a
  thread running with a stale cached virtual->physical translation to potentially
  escalate their privileges if the translation in question were writable and the
  physical page got reused for something critical (for example, a page table).
  (CVE-2016-2069, Moderate)

• A race condition flaw was found in the ioctl_send_fib() function in the Linux
  kernel's aacraid implementation. A local attacker could use this flaw to cause a
  denial of service (out-of-bounds access or system crash) by changing a certain
  size value. (CVE-2016-6480, Moderate)

• It was found that when the gcc stack protector was enabled, reading the
  /proc/keys file could cause a panic in the Linux kernel due to stack corruption.
  This happened because an incorrect buffer size was used to hold a 64-bit timeout
  value rendered as weeks. (CVE-2016-7042, Moderate)

• It was found that when file permissions were modified via chmod and the user
  modifying them was not in the owning group or capable of CAP_FSETID, the setgid
  bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions
  as well as the new ACL, but doesn't clear the setgid bit in a similar way. This
  could allow a local user to gain group privileges via certain setgid
  applications. (CVE-2016-7097, Moderate)

• A flaw was found in the Linux networking subsystem where a local attacker with
  CAP_NET_ADMIN capabilities could cause an out-of-bounds memory access by
  creating a smaller-than-expected ICMP header and sending to its destination via
  sendto(). (CVE-2016-8399, Moderate)

• It was found that the blk_rq_map_user_iov() function in the Linux kernel's
  block device implementation did not properly restrict the type of iterator,
  which could allow a local attacker to read or write to arbitrary kernel memory
  locations or cause a denial of service (use-after-free) by leveraging write
  access to a /dev/sg device. (CVE-2016-9576, CVE-2016-10088, Moderate)

• A flaw was found in the USB-MIDI Linux kernel driver: a double-free error
  could be triggered for the 'umidi' object. An attacker with physical access to
  the system could use this flaw to escalate their privileges. (CVE-2016-2384,
  Low)

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise
Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes on the RedHat website.

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Release_Notes/index.html
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Technical_Notes/index.html

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

1301893 - CVE-2016-2069 kernel: race condition in the TLB flush logic
1308444 - CVE-2016-2384 kernel: double-free in usb-audio triggered by invalid USB descriptor
1325766 - RHEL6.7: NFSv3 client performance regression where ls -l takes too long with "aggressive readdirplus" commit
1362466 - CVE-2016-6480 kernel: scsi: aacraid: double fetch in ioctl_send_fib()
1368938 - CVE-2016-7097 kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit
1373966 - CVE-2016-7042 kernel: Stack corruption while reading /proc/keys when gcc stack protector is enabled
1403145 - CVE-2016-9576 kernel: Use after free in SCSI generic device interface
1403833 - CVE-2016-8399 kernel: net: Out of bounds stack read in memcpy_fromiovec
1412210 - CVE-2016-10088 kernel: Use after free in SCSI generic device interface (CVE-2016-9576 regression)
1415908 - CVE-2016-10142 kernel - IPV6 fragmentation flaw
847106 - ext2 tests hang while running fsfuzzer