[LU-15126] RHEL 8.5 support

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.12.8, Lustre 2.15.0
• Labels: llnl
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

Announcing the Beta release of Red Hat Enterprise Linux 8.5:
https://access.redhat.com/announcements/6360652

The Beta release of RHEL 8.5 offers:

• New container management tools: Continuously increase collaboration between the development and operations teams to closely work together and power the adoption of containers with standardized, and secure container development tooling and base images.
• Extended proactive management: Extended capabilities in the Red Hat Insights services - vulnerability, compliance, and subscriptions to enable organizations to more efficiently, and effectively manage their RHEL estates across the open hybrid cloud, including deployments in the public cloud.
• More powerful data visualization: Features and new enhancements that can create simpler views of complex system performance data at scale powered by the RHEL web console, Grafana dashboard, and Red Hat Performance Co-Pilot.
• Support for additional development tools: New RHEL support for OpenJDK (Java) and .NET 6 to continuously bring a solid foundation for developers to modernize and build next generation workloads and applications.

Issue Links

• is related to: LU-15409 kernel update [RHEL8.5 4.18.0-348.7.1.el8_5]
• is related to: LU-15222 Update ZFS version to 2.0.6
• is related to: LU-15184 LBUG: ASSERTION( buf_size == strlen(secctx_name) + 1 ) failed
• is related to: LU-15212 Update ZFS version to 2.0.1

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/45285/
Subject: LU-15126 kernel: new kernel [RHEL 8.5 4.18.0-348.2.1.el8_5]
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 951f31789f76295d182f56bef1fa8d92f69e7e2a

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/45528/
Subject: LU-15126 kernel: new kernel [RHEL 8.5 4.18.0-348.2.1.el8_5]
Project: fs/lustre-release
Branch: b2_12
Current Patch Set:
Commit: 2151156020d4ea3995d9b8e118ebb62fc7fc339e

[Jian Yu]

Kernel version 4.18.0-348.2.1.el8_5 security fixes:

• kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)
• kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)

https://access.redhat.com/errata/RHSA-2021:4647?sc_cid=701600000006NHXAA2

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/45528
Subject: LU-15126 kernel: new kernel [RHEL 8.5 4.18.0-348.2.1.el8_5]
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: 30bf2165dfe39d26e051300ae3d38a01ff7f56b4

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/45526
Subject: LU-15126 kernel: RHEL 8.5 server support
Project: fs/lustre-release
Branch: b2_14
Current Patch Set: 1
Commit: 0601cec02a2815ce112fb46d70d73d2a8682c8b4

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/45525
Subject: LU-15126 kernel: new kernel [RHEL 8.5 4.18.0-348.2.1.el8_5]
Project: fs/lustre-release
Branch: b2_14
Current Patch Set: 1
Commit: 1c8b67036f98b0a783cab24629a848c83d0bdef3

[Sebastien Buisson]

Patch https://review.whamcloud.com/45501 has been pushed to address problem reported under LU-15184.

[Jian Yu]

The new RHEL 8.5 kernel version is 4.18.0-348.el8:
https://access.redhat.com/errata/RHSA-2021:4356

RHEL 8.5 is GA:
https://access.redhat.com/announcements/6488381

[Jian Yu]

It turned out the above error occurred with SELinux disabled, but op_data->op_file_secctx_name was security.selinux in mdc_open_pack(). I created a ticket LU-15184.
After enabling SELinux, runtests passed:
https://testing.whamcloud.com/test_sessions/2f61f9db-5ec6-402c-866f-b986d7323178

[Jian Yu]

LustreError: 8831:0:(pack_generic.c:805:lustre_msg_string()) can't unpack non-NULL terminated string in msg 000000008f1ca60d buffer[8] len 0

In lustre_msg_string(), the value of blen returned from lustre_msg_buflen_v2(m, index) is 0, which caused the above error.
While in lustre_msg_buflen_v2(), somehow the index value passed to it is equal to the number of buffers in lm_buflens[], which made the function return 0.

static inline __u32 lustre_msg_buflen_v2(struct lustre_msg_v2 *m, __u32 n)
{
        if (n >= m->lm_bufcount)
                return 0;       
        
        return m->lm_buflens[n];
}

[Jian Yu]

sanity test hit the same issue:

Lustre: DEBUG MARKER: -----============= acceptance-small: sanity ============----- Wed Oct 20 11:00:45 PDT 2021
Lustre: DEBUG MARKER: excepting tests: 42a 42b 42c 407 312 817 411
Lustre: DEBUG MARKER: vm85: executing check_config_client /mnt/lustre
Lustre: DEBUG MARKER: Using TIMEOUT=20
Lustre: Modifying parameter general.*.*.lbug_on_grant_miscount in log params
LustreError: 12549:0:(pack_generic.c:805:lustre_msg_string()) can't unpack non-NULL terminated string in msg 00000000f47f1c92 buffer[8] len 0
LustreError: 12549:0:(layout.c:2165:__req_capsule_get()) @@@ Wrong buffer for field 'file_secctx_name' (8 of 12) in format 'LDLM_INTENT_OPEN', 0 vs. 0 (client)  req@00000000c6c4e1e0 x1714162568806976/t0(0) o101->lustre-MDT0000-mdc-ffff9ea0c33ae000@0@lo:12/10 lens 648/0 e 0 to 0 dl 0 ref 1 fl New:PQU/0/ffffffff rc 0/-1 job:'' 
LustreError: 12549:0:(mdc_lib.c:137:mdc_file_secctx_pack()) ASSERTION( buf_size == strlen(secctx_name) + 1 ) failed:  
LustreError: 12549:0:(mdc_lib.c:137:mdc_file_secctx_pack()) LBUG