[LU-11043] kernel update [RHEL7.5 3.10.0-862.3.2.el7]

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.12.0, Lustre 2.10.5
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

Security Fix(es):

An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

Note: This issue is present in hardware and cannot be fully fixed via software update. The updated kernel packages provide software side of the mitigation for this hardware issue. To be fully functional, up-to-date CPU microcode applied on the system is required.

Issue Links

• is related to: LU-11129 kernel update [RHEL7.5 3.10.0-862.6.3.el7]
• is related to: LU-10897 kernel upgrade [RHEL7.5 3.10.0-862.2.3.el7]

Comments

[Gerrit Updater]

John L. Hammond ([e-mail]) merged in patch https://review.whamcloud.com/32542/
Subject: LU-11043 kernel: kernel update RHEL7.5 [3.10.0-862.3.2.el7]
Project: fs/lustre-release
Branch: b2_10
Current Patch Set:
Commit: 29291d976734950bac2b028bc09fc22f0b64785d

[Peter Jones]

Landed for 2.12

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/32513/
Subject: LU-11043 kernel: kernel update RHEL7.5 [3.10.0-862.3.2.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 88f6c6887cbf79fb62de4af1f5a73e3c557fe785

[Gerrit Updater]

Bob Glossman ([e-mail]) uploaded a new patch: https://review.whamcloud.com/32542
Subject: LU-11043 kernel: kernel update RHEL7.5 [3.10.0-862.3.2.el7]
Project: fs/lustre-release
Branch: b2_10
Current Patch Set: 1
Commit: 953bbe678cee1ff9167c4296f162852dd4ebafec

[Bob Glossman (Inactive)]

Bob Glossman ([e-mail]) uploaded a new patch: https://review.whamcloud.com/32513
Subject: LU-11043 kernel: kernel update RHEL7.5 [3.10.0-862.3.2.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d6a2fe1191ff9a4f55db443bf5ca134bee0cbdd0