The system crashed with a watchdog device due to grep to /dev/watchdog

Issue

• On HPE ProLiant systems, an abrupt kernel panic occurs with the following messages in the logs:

[93166.104720] watchdog: watchdog0: watchdog did not stop!
[93187.224628] Kernel panic - not syncing: 02: An NMI occurred. Depending on your system the reason for the NMI is logged in any one of the following resources:
[93187.224629] 1. Integrated Management Log (IML)
[93187.224629] 2. OA Syslog
[93187.224629] 3. OA Forward Progress Log
[93187.224629] 4. iLO Event Log
[93187.224630] CPU: 0 PID: 0 Comm: swapper/0 Kdump: loaded Not tainted 4.18.0-348.23.1.el8_5.x86_64 #1
[93187.224630] Hardware name: XXXXX, BIOS U30 11/24/2021
[93187.224630] Call Trace:
[93187.224630]  <NMI>
[93187.224631]  dump_stack+0x5c/0x80
[93187.224631]  panic+0xe7/0x2a9
[93187.224631]  ? native_apic_msr_write+0x27/0x30
[93187.224631]  nmi_panic.cold.9+0xc/0xc
[93187.224632]  hpwdt_pretimeout+0x7f/0xc2 [hpwdt]
[93187.224632]  nmi_handle+0x63/0x110
[93187.224632]  unknown_nmi_error+0x16/0x30
[93187.224632]  do_nmi+0x183/0x1e0
[93187.224632]  end_repeat_nmi+0x16/0x6f
[93187.224633] RIP: 0010:intel_idle+0x6b/0xb0
[93187.224633] Code: 40 5c 01 00 48 89 d1 0f 01 c8 48 8b 00 a8 08 75 19 e9 07 00 00 00 0f 00 2d 7e f0 51 00 c1 ee 18 b9 01 00 00 00 89 f0 0f 01 c9 <65> 48 8b 04 25 40 5c 01 00 f0 80 60 02 df f0 83 44 24 fc 00 48 8b
[93187.224633] RSP: 0018:ffffffff86403e38 EFLAGS: 00000002
[93187.224635] RAX: 0000000000000020 RBX: ffffffff86535cc8 RCX: 0000000000000001
[93187.224635] RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000003
[93187.224635] RBP: ffffce3fbfa00338 R08: 0000000000000002 R09: 0000000000029a00
[93187.224635] R10: 0000dc1c61feff24 R11: ffff9551ff828ec4 R12: 0000000000000003
[93187.224636] R13: ffffffff86535b60 R14: 0000000000000003 R15: 0000000000000003
[93187.224636]  ? intel_idle+0x6b/0xb0
[93187.224636]  ? intel_idle+0x6b/0xb0
[93187.224636]  </NMI>
[93187.224636]  cpuidle_enter_state+0x87/0x3d0
[93187.224637]  cpuidle_enter+0x2c/0x40
[93187.224637]  do_idle+0x239/0x270
[93187.224637]  cpu_startup_entry+0x6f/0x80
[93187.224637]  start_kernel+0x51d/0x53d
[93187.224637]  secondary_startup_64_no_verify+0xc2/0xcb

• On DELL systems, the system simply resets with the following message in the logs.

[83166.305720] watchdog: watchdog0: watchdog did not stop!