The kernel crashed due to a hard lockup caused by a highly possible single-bit flip on a signahd address.

Issue

• The kernel crashed due to a hard lockup caused by a highly possible single-bit flip on a signahd address.

[30946.083475] Kernel panic - not syncing: Hard LOCKUP
[30946.084115] CPU: 23 PID: 188378 Comm: java Kdump: loaded Tainted: G           OE  ------------   3.10.0-957.48.1.el7.x86_64 #1
[30946.085362] Hardware name: Cisco Systems Inc UCSC-C240-M5SX/UCSC-C240-M5SX, BIOS C240M5.4.1.1c.0.0405200025 04/05/2020
[30946.085999] Call Trace:
[30946.086613]  <NMI>  [<ffffffffb6f65ad0>] dump_stack+0x19/0x1b
[30946.087235]  [<ffffffffb6f5f8fd>] panic+0xe8/0x21f
[30946.087853]  [<ffffffffb6f78ddb>] ? system_call_fastpath+0x22/0x27
[30946.088462]  [<ffffffffb689882f>] nmi_panic+0x3f/0x40
[30946.089073]  [<ffffffffb694ab11>] watchdog_overflow_callback+0x121/0x140
[30946.089683]  [<ffffffffb69a2857>] __perf_event_overflow+0x57/0x100
[30946.090294]  [<ffffffffb69abfa4>] perf_event_overflow+0x14/0x20
[30946.090894]  [<ffffffffb680a850>] intel_pmu_handle_irq+0x220/0x510
[30946.091479]  [<ffffffffb6b7a088>] ? ioremap_page_range+0x2e8/0x480
[30946.092060]  [<ffffffffb69fd4c4>] ? vunmap_page_range+0x234/0x470
[30946.092652]  [<ffffffffb6c3fa86>] ? ghes_copy_tofrom_phys+0x116/0x210
[30946.093227]  [<ffffffffb6c3fc20>] ? ghes_read_estatus+0xa0/0x190
[30946.093796]  [<ffffffffb6f6f031>] perf_event_nmi_handler+0x31/0x50
[30946.094376]  [<ffffffffb6f7093c>] nmi_handle.isra.0+0x8c/0x150
[30946.094945]  [<ffffffffb6f70c18>] do_nmi+0x218/0x460
[30946.095497]  [<ffffffffb6f6fd9c>] end_repeat_nmi+0x1e/0x81
[30946.096041]  [<ffffffffb69137c2>] ? native_queued_spin_lock_slowpath+0x122/0x200
[30946.096580]  [<ffffffffb69137c2>] ? native_queued_spin_lock_slowpath+0x122/0x200
[30946.097116]  [<ffffffffb69137c2>] ? native_queued_spin_lock_slowpath+0x122/0x200
[30946.097635]  <EOE>  [<ffffffffb6f60378>] queued_spin_lock_slowpath+0xb/0xf
[30946.098165]  [<ffffffffb6f6e078>] _raw_spin_lock_irq+0x28/0x30
[30946.098689]  [<ffffffffb68b0be0>] exit_signals+0xa0/0x160
[30946.099217]  [<ffffffffb689ef34>] do_exit+0xc4/0xa40
[30946.099724]  [<ffffffffb689f8e7>] SyS_exit+0x17/0x20
[30946.100219]  [<ffffffffb6f78ddb>] system_call_fastpath+0x22/0x27