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Kernel panic on Oracle Linux 7.5 RHCK Errata Kernel while using lvconvert functionality to convert logical volumes to RAID mirrors (Doc ID 2464620.1)

Last updated on MAY 27, 2020

Applies to:

Linux OS - Version Oracle Linux 7.5 and later
Linux x86-64

Symptoms

Server crashes and panics while using the lvconvert functionality to convert logical volumes to RAID mirrors in Oracle Linux 7.5 RHCK.

Crash dump below:

KERNEL: /share/linuxrpm/vmlinux_repo/64/3.10.0-862.11.6.el7.x86_64/vmlinux
DUMPFILE: vmcore [PARTIAL DUMP]
CPUS: 24 [OFFLINE: 12]
DATE: Mon Sep 24 14:07:57 2018
UPTIME: 33 days, 03:18:50
LOAD AVERAGE: 1.14, 0.75, 0.58
TASKS: 7442
NODENAME: server
RELEASE: 3.10.0-862.11.6.el7.x86_64
VERSION: #1 SMP Tue Aug 14 13:14:02 PDT 2018
MACHINE: x86_64 (2266 Mhz)
MEMORY: 24 GB
PANIC: "BUG: unable to handle kernel NULL pointer dereference at 00000000000005ec"
PID: 16295
COMMAND: "systemd-udevd"
TASK: ffff8c3d7bbd8000 [THREAD_INFO: ffff8c38a82b0000]
CPU: 1
STATE: TASK_RUNNING (PANIC)

crash7lates> bt
PID: 16295 TASK: ffff8c3d7bbd8000 CPU: 1 COMMAND: "systemd-udevd"
#0 [ffff8c38a82b32e0] machine_kexec at ffffffffae2629da
#1 [ffff8c38a82b3340] __crash_kexec at ffffffffae316692
#2 [ffff8c38a82b3410] crash_kexec at ffffffffae316780
#3 [ffff8c38a82b3428] oops_end at ffffffffae91d728
#4 [ffff8c38a82b3450] no_context at ffffffffae90c6cd
#5 [ffff8c38a82b34a0] __bad_area_nosemaphore at ffffffffae90c764
#6 [ffff8c38a82b34f0] bad_area at ffffffffae90ca74
#7 [ffff8c38a82b3518] __do_page_fault at ffffffffae92088f
#8 [ffff8c38a82b3580] do_page_fault at ffffffffae9208d5
#9 [ffff8c38a82b35b0] page_fault at ffffffffae91c758
[exception RIP: read_balance+475]
RIP: ffffffffc0491ffb RSP: ffff8c38a82b3660 RFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffff8c37b52125e0 RDI: 0000000000000000
RBP: ffff8c38a82b36e8 R8: 0000000000000000 R9: 0000000000000008
R10: 00000000027ff3f0 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000060 R14: ffff8c3a79b15700 R15: ffff8c38a8fc5e00
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#10 [ffff8c38a82b36f0] raid1_make_request at ffffffffc0493c33 [raid1]
#11 [ffff8c38a82b37b0] md_handle_request at ffffffffae74cde0
#12 [ffff8c38a82b3820] raid_map at ffffffffc0555ba8 [dm_raid]
#13 [ffff8c38a82b3830] __map_bio at ffffffffc028b136 [dm_mod]
#14 [ffff8c38a82b38c8] __clone_and_map_data_bio at ffffffffc028b437 [dm_mod]
#15 [ffff8c38a82b3930] __split_and_process_bio at ffffffffc028b811 [dm_mod]
#16 [ffff8c38a82b39d0] dm_make_request at ffffffffc028bd7d [dm_mod]
#17 [ffff8c38a82b3a08] generic_make_request at ffffffffae51f0cb
#18 [ffff8c38a82b3a58] submit_bio at ffffffffae51f350
#19 [ffff8c38a82b3ab0] mpage_bio_submit at ffffffffae4629aa
#20 [ffff8c38a82b3ad0] mpage_readpages at ffffffffae4633df
#21 [ffff8c38a82b3bb0] blkdev_readpages at ffffffffae45d7ad
#22 [ffff8c38a82b3bc0] __do_page_cache_readahead at ffffffffae3a3ecf
#23 [ffff8c38a82b3c80] force_page_cache_readahead at ffffffffae3a4469
#24 [ffff8c38a82b3cc0] page_cache_sync_readahead at ffffffffae3a4547
#25 [ffff8c38a82b3d00] generic_file_aio_read at ffffffffae398832
#26 [ffff8c38a82b3dd8] blkdev_aio_read at ffffffffae45dbec
#27 [ffff8c38a82b3e00] do_sync_read at ffffffffae41e5c3
#28 [ffff8c38a82b3ed8] vfs_read at ffffffffae41efef
#29 [ffff8c38a82b3f08] sys_read at ffffffffae41febf
#30 [ffff8c38a82b3f50] system_call_fastpath at ffffffffae92579b
RIP: 00007facd3cdd790 RSP: 00007ffd14ef2e20 RFLAGS: 00010212
RAX: 0000000000000000 RBX: 00000004ffe7e200 RCX: ffffffffae9256e1
RDX: 0000000000000018 RSI: 000055636f62b828 RDI: 0000000000000008
RBP: 000055636f62b800 R8: 0000000000000003 R9: 0000000000000040
R10: 0000000000000005 R11: 0000000000000246 R12: 000055636f629570
R13: 0000000000000018 R14: 000055636f6295c0 R15: 000055636f62b818
ORIG_RAX: 0000000000000000 CS: 0033 SS: 002b

 

Changes

Upgraded  the RHCK to 3.10.0-862.11.6.el7

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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