Systemd shutdown fails to set the Intel TCO watchdog timeout to 10 minutes, resulting in a kernel panic on RHEL9.8

Issue

• A system running RHEL-9.8 with kernel 5.14.0-687.31.1.el9_8 or later and the Intel TCO watchdog enabled may encounter a kernel panic during a normal reboot or shutdown.
• The following messages are reported during shutdown:

[82342.886646] watchdog: watchdog0: watchdog did not stop!
[82342.889572] systemd-shutdown[1]: Using hardware watchdog 'iTCO_wdt', version 6, device /dev/watchdog0
[82342.889709] systemd-shutdown[1]: Failed to set timeout to 10min: Invalid argument
[82342.890097] systemd-shutdown[1]: Failed to disable hardware watchdog, ignoring: Operation not permitted
[82342.890504] watchdog: watchdog0: watchdog did not stop!
...
[82372.890758] Kernel panic - not syncing: watchdog pretimeout event
[82372.898239] CPU: 15 PID: 0 Comm: swapper/15 Kdump: loaded Tainted: GS --------- 5.14.0-687.41.1.el9_8.x86_64 #1
[82372.912729] Hardware name: Dell Inc. PowerEdge R770/03TJR3, BIOS 0.5.66 04/01/2025
[82372.922037] Call Trace:
[82372.925057]  <IRQ>
[82372.927581]  dump_stack_lvl+0x33/0x50
[82372.932102]  vpanic+0x129/0x2f0
[82372.936008]  ? __pfx_watchdog_hrtimer_pretimeout+0x10/0x10
[82372.942742]  panic+0x58/0x60
[82372.946295]  pretimeout_panic+0x11/0x20
[82372.951036]  watchdog_notify_pretimeout+0x2c/0x50
[82372.956835]  watchdog_hrtimer_pretimeout+0x11/0x20
[82372.962750]  __hrtimer_run_queues+0x10f/0x2b0
[82372.968139]  hrtimer_interrupt+0xff/0x240
[82372.973067]  __sysvec_apic_timer_interrupt+0x51/0x120
[82372.979307]  sysvec_apic_timer_interrupt+0x6d/0x90
[82372.985189]  </IRQ>
[82372.987780]  <TASK>
[82372.990398]  asm_sysvec_apic_timer_interrupt+0x16/0x20
[82372.996719] RIP: 0010:acpi_safe_halt+0x1a/0x20