Comment 1 for bug 2034057

And this is affecting 4.15 AWS as well. Here is the output from b-aws-4.15-2099

Test output:
+ echo blk
+ echo mmiotrace
+ echo function_graph
 (Test interrupted here)

dmesg:
[ 216.814155] kernel BUG at /build/linux-aws-fips-hcslsq/linux-aws-fips-4.15.0/arch/x86/xen/spinlock.c:69!
[ 216.816072] invalid opcode: 0000 [#1] SMP PTI
[ 216.816991] Modules linked in: nls_iso8859_1 binfmt_misc sb_edac intel_rapl_perf serio_raw sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc cirrus ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops aesni_intel drm aes_x86_64 crypto_simd i2c_piix4 glue_helper cryptd i2c_core ixgbevf pata_acpi
[ 216.827515] CPU: 1 PID: 13 Comm: cpuhp/1 Not tainted 4.15.0-2099-aws-fips #105-Ubuntu
[ 216.829132] Hardware name: Xen HVM domU, BIOS 4.11.amazon 08/24/2006
[ 216.830471] RIP: 0010:dummy_handler+0x4/0x10
[ 216.831362] RSP: 0000:ffffa0c827a43e38 EFLAGS: 00010046
[ 216.832477] RAX: ffffffff8302a9c0 RBX: 000000000000003b RCX: 000000000000003b
[ 216.833951] RDX: 0000000000400e00 RSI: 0000000000000000 RDI: 000000000000003b
[ 216.835425] RBP: ffffa0c827a43e38 R08: ffffa0c827000db0 R09: ffffa0c81b14ea00
[ 216.836902] R10: 0000000000000040 R11: 0000000000000000 R12: 0000000000000000
[ 216.838378] R13: 0000000000000000 R14: 0000000000000000 R15: ffffa0c82444f400
[ 216.839854] FS: 0000000000000000(0000) GS:ffffa0c827a40000(0000) knlGS:0000000000000000
[ 216.841533] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 216.842708] CR2: 0000000000000000 CR3: 000000003b80a001 CR4: 00000000001606e0
[ 216.844141] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 216.845631] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 216.847095] Call Trace:
[ 216.847640] <IRQ>
[ 216.848079] __handle_irq_event_percpu+0x44/0x1a0
[ 216.849070] handle_irq_event_percpu+0x32/0x80
[ 216.850009] handle_percpu_irq+0x3d/0x60
[ 216.850829] generic_handle_irq+0x28/0x40
[ 216.851687] handle_irq_for_port+0x8f/0xe0
[ 216.852556] evtchn_2l_handle_events+0x157/0x270
[ 216.853537] __xen_evtchn_do_upcall+0x76/0xe0
[ 216.854453] xen_evtchn_do_upcall+0x2b/0x50
[ 216.855327] xen_hvm_callback_vector+0x90/0xa0
[ 216.856266] </IRQ>
[ 216.856724] RIP: 0010:_raw_spin_unlock_irqrestore+0x15/0x20
[ 216.857890] RSP: 0000:ffffb95780d37d00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff0c
[ 216.859472] RAX: 0000000000000001 RBX: ffffa0c82444f400 RCX: 000000000002cc00
[ 216.860907] RDX: 0000000000000001 RSI: 0000000000000246 RDI: 0000000000000246
[ 216.862353] RBP: ffffb95780d37d00 R08: ffffa0c827000db0 R09: ffffa0c81b14ea00
[ 216.863782] R10: 0000000000000040 R11: 0000000000000246 R12: 000000000000003b
[ 216.865233] R13: 0000000000000000 R14: ffffa0c81b14ea00 R15: ffffa0c81b14eaa4
[ 216.866662] __setup_irq+0x424/0x6e0
[ 216.867392] request_threaded_irq+0xf9/0x170
[ 216.868281] bind_ipi_to_irqhandler+0xc6/0x1f0
[ 216.869184] ? xen_qlock_wait+0x90/0x90
[ 216.871428] ? skx_uncore_pci_init+0x40/0x40
[ 216.873772] xen_init_lock_cpu+0x97/0xf0
[ 216.876010] ? skx_uncore_pci_init+0x40/0x40
[ 216.878279] xen_cpu_up_online+0xe/0x20
[ 216.880408] cpuhp_invoke_callback+0x9d/0x570
[ 216.882651] cpuhp_thread_fun+0xc4/0x150
[ 216.884751] smpboot_thread_fn+0xfc/0x170
[ 216.886799] kthread+0x121/0x140
[ 216.888664] ? sort_range+0x30/0x30
[ 216.890525] ? kthread_create_worker_on_cpu+0x70/0x70
[ 216.892663] ret_from_fork+0x35/0x40
[ 216.894462] Code: c0 8b 75 e4 74 d6 44 89 e7 e8 29 3b 57 00 eb d6 44 89 e7 e8 1f 5f 57 00 eb cc 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 80 3d 79 e9 3f 01 00 55 48
[ 216.900389] RIP: dummy_handler+0x4/0x10 RSP: ffffa0c827a43e38
[ 216.902668] ---[ end trace af76218ae4efc4a6 ]---
[ 216.904746] Kernel panic - not syncing: Fatal exception in interrupt
[ 216.907189] Kernel Offset: 0x2000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)