[LU-16222] RHEL 8.7 support

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.12.10, Lustre 2.15.2
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

Red Hat Enterprise Linux 8.7 Beta release is available:
https://access.redhat.com/announcements/6977526
Kernel version: 4.18.0-423.el8

Issue Links

• is related to: LU-16304 kernel update [RHEL8.7 4.18.0-425.3.1.el8]

Comments

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/48993
Subject: LU-16222 kernel: RHEL 8.7 client and server support
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: b240f50394566698376f280ddd1a438262b078cf

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/48941
Subject: LU-16222 tests: full group testing on RHEL 8.7
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: aabfa3b40033baa5c0511775e97d89af301d3b95

[Gerrit Updater]

"Jian Yu <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/48879
Subject: LU-16222 kernel: RHEL 8.7 client and server support
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 36b582790b483f7aa9dfea262b566165b1ce450d

[Jian Yu]

Thank you bzzz. The attached patch can be applied without conflict. I'm resolving the conflicts in other patches.

[Alex Zhuravlev]

@Jian, please try the patch attached.

[Jian Yu]

Hi bzzz, I just uploaded it to /scratch/kernel-source/ on trevis cluster:

/scratch/kernel-source/kernel-4.18.0-423.el8.src.rpm

[Alex Zhuravlev]

yujian where can I find : 4.18.0-423 source RPM ?

[James A Simmons]

I think this patch is needed for Ubuntu platform as well.

[Jian Yu]

The main conflict is in ext4-pdirop.patch.
RHEL 8.7 kernel 4.18.0-423.el8 contains the following change from Linux kernel 5.18:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3ba733f879c2a88910744647e41edeefbc0d92b2

commit 3ba733f879c2a88910744647e41edeefbc0d92b2
Author:     Jan Kara <[e-mail]>
AuthorDate: Wed May 18 11:33:29 2022 +0200
Commit:     Theodore Ts'o <[e-mail]>
CommitDate: Tue May 24 15:34:13 2022 -0400

    ext4: avoid cycles in directory h-tree
    
    A maliciously corrupted filesystem can contain cycles in the h-tree
    stored inside a directory. That can easily lead to the kernel corrupting
    tree nodes that were already verified under its hands while doing a node
    split and consequently accessing unallocated memory. Fix the problem by
    verifying traversed block numbers are unique.
    
    Cc: [e-mail]
    Signed-off-by: Jan Kara <[e-mail]>
    Link: https://lore.kernel.org/r/[e-mail]
    Signed-off-by: Theodore Ts'o <[e-mail]>

The change made ext4-pdirop.patch have conflicts in dx_probe() in fs/ext4/namei.c.
Hi bzzz, I'm not sure if I can understand the pdirops codes in a short time and resolve the conflicts correctly. Could you please help with creating an updated ext4-pdirop.patch against kernel 5.18? I will incorporate the patch into RHEL 8.7 support patch.

[Jian Yu]

The following ldiskfs patches have conflicts with kernel 4.18.0-423.el8:
- rhel8.3/ext4-misc.patch
- rhel8.3/ext4-mballoc-extra-checks.patch
- rhel7.6/ext4-mballoc-pa-free-mismatch.patch
- rhel8.4/ext4-pdirop.patch
- rhel8.3/ext4-corrupted-inode-block-bitmaps-handling-patches.patch
- rhel8/ext4-mballoc-skip-uninit-groups-cr0.patch
- rhel8.1/ext4-mballoc-prefetch.patch
- rhel8.5/ext4-filename-encode.patch