Updating to kernel 4.4.175-94.79 leads to a panic on HPE Superdome Flex or MC990x/UV300 systems

This document (7023772) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 Service Pack 3 (SLES 12 SP3)

Situation

Note that this happens on HPE Superdome flex or MC990x/UV300 systems but can happen on any system with a UV BIOS!

Updating to SLES12 SP3 kernel 4.4.175-94.79.1 leads to a panic with the following stack trace.

[    0.000000] Linux version 4.4.175-94.79-default (geeko@buildhost) (gcc version 4.8.5 (SUSE Linux) ) #1 SMP Thu Feb 21 16:03:55 UTC 2019 (047a6d3)
[...]
[    1.391265] UV: N:3 M:0 m_shift:0 n_lshift:0
[    1.396033] UV: gpa_mask/shift:0x3fffffffffff/46 pnode_mask:0x7 apic_pns:6
[    1.403710] UV: mmr_base/shift:0xfffa0000000/26 gru_base/shift:0xffee0000000/26
[    1.411871] UV: gnode_upper:0x0 gnode_extra:0x0
[    1.416928] UV: Found 8 hubs, 8 nodes, 448 CPUs
[    1.421981] BUG: unable to handle kernel NULL pointer dereference at           (null)
[    1.430744] IP: [<ffffffff8161e7ee>] __down_common+0x4c/0xf9
[    1.437082] PGD 0
[    1.439344] Oops: 0002 [#1] SMP
[    1.442979] Modules linked in:
[    1.446401] Supported: Yes
[    1.449423] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.175-94.79-default #1
[    1.457486] Hardware name: HPE Superdome Flex/Superdome Flex, BIOS Bundle:3.0.444-20190306-072130-jenkins SFW:IP147.007.000.168.000.1903012301 03/01/2019
[    1.472813] task: ffff8801d154c040 ti: ffff8801d1550000 task.ti: ffff8801d1550000
[    1.481167] RIP: 0010:[<ffffffff8161e7ee>]  [<ffffffff8161e7ee>] __down_common+0x4c/0xf9
[    1.490214] RSP: 0000:ffff8801d1553c48  EFLAGS: 00010096
[    1.496144] RAX: 0000000000000000 RBX: 7fffffffffffffff RCX: ffffffff82416d9c
[    1.504110] RDX: ffff8801d1553c50 RSI: 0000000000000001 RDI: ffffffff82416d94
[    1.512077] RBP: ffff8801d1553c98 R08: 0000000000000000 R09: 0000000000000000
[    1.520042] R10: 0000000000000000 R11: 00000000000003c7 R12: ffffffff82416d94
[    1.528010] R13: 0000000000000001 R14: 0000000000000001 R15: ffff8801d154c040
[    1.535975] FS:  0000000000000000(0000) GS:ffff88b787400000(0000) knlGS:0000000000000000
[    1.545008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.551422] CR2: 0000000000000000 CR3: 0000000001e0c000 CR4: 0000000000760670
[    1.559389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    1.567355] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    1.575321] PKRU: 00000000
[    1.578334] Stack:
[    1.580579]  0000000001000000 ffffffff82416d9c 0000000000000000 0000000000000000
[    1.588892]  0000000000000000 ffffffff82416d94 ffff8801d1553d18 ffff8801d1553d20
[    1.597190]  0000000000000000 fffffffffffffffc 0000000000000000 ffffffff810ccae2
[    1.605495] Call Trace:
[    1.608227]  [<ffffffff810ccae2>] down_interruptible+0x42/0x50
[    1.614744]  [<ffffffff81079849>] uv_bios_call_irqsave+0x39/0xd0
[    1.621452]  [<ffffffff8107991b>] uv_bios_get_sn_info+0x3b/0xa0
[    1.628062]  [<ffffffff81fa98a3>] uv_system_init_hub+0x8e6/0x142d
[    1.634870]  [<ffffffff81fa38bc>] native_smp_prepare_cpus+0x2af/0x309
[    1.642068]  [<ffffffff81f8f195>] kernel_init_freeable+0xc3/0x226
[    1.648875]  [<ffffffff8161414a>] kernel_init+0xa/0xe0
[    1.654615]  [<ffffffff816210b5>] ret_from_fork+0x55/0x80
[    1.662876] DWARF2 unwinder stuck at ret_from_fork+0x55/0x80
[    1.669195]
[    1.670850] Leftover inexact backtrace:
[    1.670850]
[    1.676783]  [<ffffffff81614140>] ? rest_init+0x80/0x80
[    1.682617] Code: e6 81 00 00 00 49 89 fc 53 48 89 d3 48 83 e4 f0 48 83 ec 28 48 8b 47 10 48 8d 54 24 08 48 89 4c 24 08 48 89 44 24 10 48 89 57 10 <48> 89 10 4c 89 e8 4c 89 7c 24 18 83 e0 01 c6 44 24 20 00 48 89
[    1.704505] RIP  [<ffffffff8161e7ee>] __down_common+0x4c/0xf9
[    1.710939]  RSP <ffff8801d1553c48>
[    1.714831] CR2: 0000000000000000
[    1.718536] ---[ end trace 635cd5391d48baa3 ]---
[    1.723698] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
[    1.723698]
[    1.733888] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009

Resolution

A kernel has been released in to maintenance that contains a fix for this issue:-

29 Mar 2019 - the Linux Kernel 801 - version 4.4.176-94.88.1

Cause

Additional Information

Disclaimer

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