VERIFICATION:

(k)rafaeldtinoco@ocfs2:~$ apt-cache policy linux-image-5.4.0-14-generic
linux-image-5.4.0-14-generic:
  Installed: 5.4.0-14.17
  Candidate: 5.4.0-14.17
  Version table:
 *** 5.4.0-14.17 500
        500 http://br.archive.ubuntu.com/ubuntu focal-proposed/main amd64 
Packages
        100 /var/lib/dpkg/status

(k)rafaeldtinoco@ocfs2:~/scripts$ sudo ./ocfs2_reproducer.sh
=== dlmfs ===
ocfs2_dlmfs /dlm ocfs2_dlmfs rw,relatime 0 0
=== lsmod ===
ocfs2_stack_o2cb       16384  0
ocfs2_dlm             192512  1 ocfs2_stack_o2cb
ocfs2_nodemanager     196608  7 ocfs2_stack_o2cb,ocfs2_dlm,ocfs2_dlmfs
ocfs2_stackglue        20480  2 ocfs2_stack_o2cb,ocfs2_dlmfs
=== o2hbmonitor ===
1026 o2hbmonitor
=== o2cluster ===
o2cb,ocfs2,local
=== o2cb_ctl ===
cluster:
        name = ocfs2
        node_count = 1
        status = configured

=== losetup ===
200+0 records in
200+0 records out
209715200 bytes (210 MB, 200 MiB) copied, 0.192249 s, 1.1 GB/s
=== mkfs ===
mkfs.ocfs2 1.8.6
Cluster stack: o2cb
Cluster name: ocfs2
Stack Flags: 0x0
NOTE: Feature extended slot map may be enabled
Label:
Features: sparse extended-slotmap backup-super unwritten inline-data 
strict-journal-super xattr indexed-dirs refcount discontig-bg append-dio
Block size: 1024 (10 bits)
Cluster size: 4096 (12 bits)
Volume size: 209715200 (51200 clusters) (204800 blocks)
Cluster groups: 7 (tail covers 5120 clusters, rest cover 7680 clusters)
Extent allocator size: 2097152 (1 groups)
Journal size: 4194304
Node slots: 2
Creating bitmaps: done
Initializing superblock: done
Writing system files: done
Writing superblock: done
Writing backup superblock: 0 block(s)
Formatting Journals: done
Growing extent allocator: done
Formatting slot map: done
Formatting quota files: done
Writing lost+found: done
mkfs.ocfs2 successful

=== mount ===
Filesystem     1K-blocks  Used Available Use% Mounted on
/dev/loop0        204800 14904    189896   8% /mnt
cleanup

** Tags removed: verification-needed-eoan
** Tags added: verification-done verification-done-eoan

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https://bugs.launchpad.net/bugs/1852122

Title:
  ocfs2-tools is causing kernel panics in Ubuntu Focal
  (Ubuntu-5.4.0-9.12)

Status in OCFS2 Tools:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in ocfs2-tools package in Ubuntu:
  Invalid
Status in linux source package in Eoan:
  Fix Committed
Status in ocfs2-tools source package in Eoan:
  Invalid
Status in linux source package in Focal:
  Fix Released
Status in ocfs2-tools source package in Focal:
  Invalid

Bug description:
  
  [Impact] 

   * Umounts to OCFS2 filesystems will cause a kernel crash in any
  kernel containing commit e581595ea29c (v5.3-rc1) and not containing
  its fix b73eba2a867e (v5.5-rc5).

  [Test Case]

   * ocfs2_reproducer.sh (attached to this bug)

  [Regression Potential]

   * it could cause ocfs2 issues, so I guess its a low impact considering 
amount of users.
   * Its a straightforward fix identified by upstream developer and a clean 
cherry-pick for us.

  [Other Info]

   * Original description:

  I noticed the tests for ocfs2-tools/1.8.6-1ubuntu1 were constantly
  retrying themselves. It's a feature we have so that transient /
  occasional failures are auto-retried, but it's misfiring here because
  we're not detecting that it's a consistent failure. That particular
  bug is fixed, but it means that ocfs2-tools is failing on ppc64el.
  Here's the important part of the log, full output attached.

  [   85.605738] BUG: Unable to handle kernel data access at 0x01744098
                                                                                
                                   [   85.605850] Faulting instruction address: 
0xc000000000e81168
                                                                                
                                   [   85.605901] Oops: Kernel access of bad 
area, sig: 11 [#1]
                                                                                
                                   [   85.605970] LE PAGE_SIZE=64K MMU=Hash SMP 
NR_CPUS=2048 NUMA pSeries
                                                                                
                                   [   85.606029] Modules linked in: ocfs2 
quota_tree ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager 
ocfs2_stackglue iptable_mangle xt_TCPMSS xt_tcpudp bpfilter dm_multipath 
scsi_dh_rdac scsi_dh_emc scsi_dh_alua vmx_crypto crct10dif_vpmsum sch_fq_codel 
ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c 
crc32c_vpmsum virtio_net virtio_blk net_failover failover
                                                                                
                                   [   85.606291] CPU: 0 PID: 1 Comm: systemd 
Not tainted 5.3.0-18-generic #19-Ubuntu
                                                                                
                                   [   85.606350] NIP:  c000000000e81168 LR: 
c00000000054f240 CTR: 0000000000000000
                                                                                
                                   [   85.606410] REGS: c00000005a3e3700 TRAP: 
0300   Not tainted  (5.3.0-18-generic)
                                                                                
                                   [   85.606469] MSR:  8000000000009033 
<SF,EE,ME,IR,DR,RI,LE>  CR: 28024448  XER: 00000000
                                                                                
                                   [   85.606531] CFAR: 0000701f9806f638 DAR: 
0000000001744098 DSISR: 40000000 IRQMASK: 0
                                                                                
                                   [   85.606531] GPR00: 0000000000007374 
c00000005a3e3990 c0000000019c9100 c00000004fe462a8
                                                                                
                                   [   85.606531] GPR04: c00000005856d840 
000000000000000e 0000000074656772 c00000004fe4a568
                                                                                
                                   [   85.606531] GPR08: 0000000000000000 
c000000058568004 0000000001744090 0000000000000000
                                                                                
                                   [   85.606531] GPR12: 00000000e8086002 
c000000001d60000 00007fffddd522d0 0000000000000000
                                                                                
                                   [   85.606531] GPR16: 0000000000000000 
0000000000000000 0000000000000000 c00000000755e07c
                                                                                
                                   [   85.606531] GPR20: c0000000598caca8 
c00000005a3e3a58 0000000000000000 c000000058292f00
                                                                                
                                   [   85.606531] GPR24: c000000000eea710 
0000000000000000 c00000005856d840 c00000000755e074
                                                                                
                                   [   85.606531] GPR28: 000000006518907d 
c00000005a3e3a68 c00000004fe4b160 00000000027c47b6
                                                                                
                                   [   85.607079] NIP [c000000000e81168] 
rb_insert_color+0x18/0x1c0
                                                                                
                                   [   85.607137] LR [c00000000054f240] 
ext4_htree_store_dirent+0x140/0x1c0
                                                                                
                                   [   85.607186] Call Trace:
                                                                                
                                   [   85.607208] [c00000005a3e3990] 
[c00000000054f158] ext4_htree_store_dirent+0x58/0x1c0 (unreliable)
                                                                                
                                   [   85.607279] [c00000005a3e39e0] 
[c000000000594cd8] htree_dirblock_to_tree+0x1b8/0x380
                                                                                
                                   [   85.607340] [c00000005a3e3b00] 
[c0000000005962c0] ext4_htree_fill_tree+0xc0/0x3f0
                                                                                
                                   [   85.607401] [c00000005a3e3c00] 
[c00000000054ebe4] ext4_readdir+0x814/0xce0
                                                                                
                                   [   85.607459] [c00000005a3e3d40] 
[c000000000472d6c] iterate_dir+0x1fc/0x280
                                                                                
                                   [   85.607511] [c00000005a3e3d90] 
[c0000000004746f0] ksys_getdents64+0xa0/0x1f0
                                                                                
                                   [   85.607572] [c00000005a3e3e00] 
[c000000000474868] sys_getdents64+0x28/0x130
                                                                                
                                   [   85.607622] [c00000005a3e3e20] 
[c00000000000b388] system_call+0x5c/0x70
                                                                                
                                   [   85.607672] Instruction dump:
                                                                                
                                   [   85.607703] 4082ffe8 4e800020 38600000 
4e800020 60000000 60000000 e9230000 2c290000
                                                                                
                                   [   85.607764] 4182018c e9490000 71480001 
4c820020 <e90a0008> 7c284840 2fa80000 4182006c
                                                                                
                                   [   85.607827] ---[ end trace 
cfc53af0f8d62cef ]---
                                                                                
                                   [   85.610600]
                                                                                
                                   [   86.611522] BUG: Unable to handle kernel 
data access at 0xc000030058567eff
                                                                                
                                   [   86.611604] Faulting instruction address: 
0xc000000000403aa8
                                                                                
                                   [   86.611656] Oops: Kernel access of bad 
area, sig: 11 [#2]
                                                                                
                                   [   86.611697] LE PAGE_SIZE=64K MMU=Hash SMP 
NR_CPUS=2048 NUMA pSeries
                                                                                
                                   [   86.611748] Modules linked in: ocfs2 
quota_tr

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