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Bug 2058501

Summary:	mdadm-4.2-2.el9 regressions panic during reshape
Product:	Red Hat Enterprise Linux 9	Reporter:	Fine Fan <ffan>
Component:	mdadm	Assignee:	Nigel Croxon <ncroxon>
Status:	CLOSED WONTFIX	QA Contact:	Fine Fan <ffan>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	9.0	CC:	dledford, lmiksik, ncroxon, xni, yizhan
Target Milestone:	rc	Keywords:	Regression, Triaged
Target Release:	9.1	Flags:	pm-rhel: mirror+
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-5.14.0-137.el9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-08-25 07:28:24 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Fine Fan 2022-02-25 07:04:18 UTC

This bug was initially created as a copy of Bug #2058496

I am copying this bug because: 



Description of problem:


Version-Release number of selected component (if applicable):
RHEL-9.0.0-20220223.1
kernel-5.14.0-63.el9.x86_64
mdadm-4.2-2.el9


How reproducible:


Steps to Reproduce:
mdadm --create --run /dev/md0 --level 1 --metadata 1.2 --raid-devices 6  /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4 /dev/loop5     --spare-devices 1  /dev/loop6

mkfs -t ext4 /dev/md0

mount -t ext4 /dev/md0 /mnt/md_test

dd if=/dev/urandom of=/mnt/md_test/testfile bs=1M count=100

mdadm --grow -l0 /dev/md0 --backup-file=tmp0


Actual results:
The server panic.

Expected results:
The server don't panic.

Additional info:

Comment 1 Fine Fan 2022-02-25 08:12:11 UTC

[  773.597483] BUG: kernel NULL pointer dereference, address: 0000000000000000
[  773.604478] #PF: supervisor instruction fetch in kernel mode
[  773.610136] #PF: error_code(0x0010) - not-present page
[  773.615274] PGD 0 P4D 0 
[  773.617807] Oops: 0010 [#1] PREEMPT SMP NOPTI
[  773.622164] CPU: 24 PID: 1954 Comm: jbd2/md0-8 Kdump: loaded Not tainted 5.14.0-63.el9.x86_64 #1
[  773.630943] Hardware name: Dell Inc. PowerEdge R6515/035YY8, BIOS 2.5.5 10/07/2021
[  773.638500] RIP: 0010:0x0
[  773.641130] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[  773.648001] RSP: 0018:ffffb206405afab0 EFLAGS: 00010206
[  773.653225] RAX: 0000000000000000 RBX: 0000000000092800 RCX: 0000000000000080
[  773.660348] RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000092800
[  773.667474] RBP: ffff96e91a7e4718 R08: ffff96e901b24600 R09: 0000000000000400
[  773.674606] R10: 0000000000000000 R11: ffff96e9165aa3f0 R12: 0000000000092c00
[  773.681738] R13: 0000000000000400 R14: ffff96e91a7e4718 R15: ffff96e9012ed4c0
[  773.688860] FS:  0000000000000000(0000) GS:ffff96f01f200000(0000) knlGS:0000000000000000
[  773.696940] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  773.702796] CR2: ffffffffffffffd6 CR3: 0000000427610004 CR4: 0000000000770ee0
[  773.709922] PKRU: 55555554
[  773.712634] Call Trace:
[  773.715079]  mempool_alloc+0x62/0x160
[  773.718747]  ? ext4_map_blocks+0x3aa/0x5e0 [ext4]
[  773.723459]  ? xas_store+0x1d9/0x5f0
[  773.727039]  ? jbd2_transaction_committed+0x55/0x60 [jbd2]
[  773.732523]  bio_alloc_bioset+0x9d/0x330
[  773.736450]  bio_clone_fast+0x1a/0x70
[  773.740115]  md_account_bio+0x39/0x70
[  773.743782]  raid0_make_request+0x9c/0x350 [raid0]
[  773.748573]  md_handle_request+0x12c/0x1c0
[  773.752664]  ? ktime_get+0x38/0x90
[  773.756071]  ? submit_bio_checks+0x1ce/0x5a0
[  773.760342]  md_submit_bio+0x67/0xa0
[  773.763912]  __submit_bio+0x95/0x140
[  773.767483]  __submit_bio_noacct+0x81/0x1e0
[  773.771662]  submit_bh_wbc+0x15c/0x180
[  773.775414]  jbd2_journal_commit_transaction+0xa2c/0x19d0 [jbd2]
[  773.781421]  ? finish_task_switch.isra.0+0xb4/0x290
[  773.786300]  kjournald2+0xaf/0x280 [jbd2]
[  773.790311]  ? do_wait_intr_irq+0xa0/0xa0
[  773.794323]  ? jbd2_journal_release_jbd_inode+0x150/0x150 [jbd2]
[  773.800329]  kthread+0x149/0x170
[  773.803666]  ? set_kthread_struct+0x40/0x40
[  773.807956]  ret_from_fork+0x22/0x30
[  773.811537] Modules linked in: raid0 ext4 mbcache jbd2 raid1 loop rfkill sunrpc dm_multipath intel_rapl_msr dcdbas intel_rapl_common amd64_edac edac_mce_amd kvm_amd kvm irqbypass rapl pcspkr dell_smbios dell_wmi_descriptor wmi_bmof ipmi_ssif mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec k10temp i2c_piix4 acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter drm fuse xfs libcrc32c sd_mod t10_pi sg crct10dif_pclmul ahci crc32_pclmul crc32c_intel libahci libata tg3 ghash_clmulni_intel ccp sp5100_tco wmi dm_mirror dm_region_hash dm_log dm_mod
[  773.863491] CR2: 0000000000000000

Comment 2 XiaoNi 2022-02-28 02:03:15 UTC

This should be fixed by patch

commit 0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952
Author: Xiao Ni <xni>
Date:   Fri Dec 10 17:31:15 2021 +0800

    md: Move alloc/free acct bioset in to personality

Comment 3 Nigel Croxon 2022-03-08 14:28:17 UTC

Submitted into RHEL-9.1.0
MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/550 
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2042797
Submitted to: git:redhat/centos-stream/src/kernel/centos-stream-9.git
Patch #22 in the series.

-Nigel

Comment 11 Nigel Croxon 2022-05-02 16:11:49 UTC

Proposed upstream fix
https://www.spinics.net/lists/raid/msg70201.html

Comment 13 Nigel Croxon 2022-07-14 14:37:02 UTC

Fix is in ..
https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1134

Comment 20 RHEL Program Management 2023-08-25 07:28:24 UTC

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.