Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0

Path	csiph.com!fu-berlin.de!bofh.it!news.nic.it!robomod
From	Thorsten Sperber <lists+debian@aero2k.de>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0
Date	Thu, 25 Sep 2025 17:30:01 +0200
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Cross-posted to 3 groups.

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On 9/25/25 00:10, Thomas Gleixner wrote:
>> # cat /proc/cmdline
>> BOOT_IMAGE=/vmlinuz-6.1.0-40-amd64 root=/dev/mapper/thecube--vg-root ro quiet intel_iommu=off intel_idle.max_cstate=2
>>
>> # cat /sys/devices/system/cpu/cpuidle/current_driver
>> intel_idle
>>
>> # ls -l /sys/devices/system/cpu/cpu0/cpuidle/
>> insgesamt 0
>> drwxr-xr-x 2 root root 0 24. Sep 19:14 state0
>> drwxr-xr-x 3 root root 0 24. Sep 19:14 state1
>> drwxr-xr-x 3 root root 0 24. Sep 19:14 state2
>>
>> # cat /sys/devices/system/cpu/cpu0/cpuidle/state*/name
>> POLL
>> C1
>> C1E
> What's the output for the above on 6.12?
>
All the same (apart from the cmdline of course). Btw, error appeared in the morning (without intel_iommu=off), still without halting/crashing the system. Bugs me a little that I can't exactly reproduce the "crash to coldstart" situation again. Just in case someone sees something new:

# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-6.12.43+deb13-amd64 root=/dev/mapper/thecube--vg-root ro quiet intel_idle.max_cstate=2


[Do Sep 25 07:15:50 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0.
[Do Sep 25 07:15:50 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[Do Sep 25 07:15:50 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019
[Do Sep 25 07:15:50 2025] RIP: 0010:intel_idle+0x55/0x90
[Do Sep 25 07:15:50 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6
[Do Sep 25 07:15:50 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046
[Do Sep 25 07:15:50 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
[Do Sep 25 07:15:50 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002
[Do Sep 25 07:15:50 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e
[Do Sep 25 07:15:50 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0
[Do Sep 25 07:15:50 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000
[Do Sep 25 07:15:50 2025] FS:  0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000
[Do Sep 25 07:15:50 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Do Sep 25 07:15:50 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0
[Do Sep 25 07:15:50 2025] Call Trace:
[Do Sep 25 07:15:50 2025]  <TASK>
[Do Sep 25 07:15:50 2025]  cpuidle_enter_state+0x81/0x420
[Do Sep 25 07:15:50 2025]  cpuidle_enter+0x2d/0x40
[Do Sep 25 07:15:50 2025]  do_idle+0x1e5/0x240
[Do Sep 25 07:15:50 2025]  cpu_startup_entry+0x29/0x30
[Do Sep 25 07:15:50 2025]  rest_init+0xcc/0xd0
[Do Sep 25 07:15:50 2025]  start_kernel+0x74c/0x750
[Do Sep 25 07:15:50 2025]  x86_64_start_reservations+0x24/0x30
[Do Sep 25 07:15:50 2025]  x86_64_start_kernel+0x95/0xa0
[Do Sep 25 07:15:50 2025]  common_startup_64+0x13e/0x141
[Do Sep 25 07:15:50 2025]  </TASK>
[Do Sep 25 07:15:52 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0.
[Do Sep 25 07:15:52 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[Do Sep 25 07:15:52 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019
[Do Sep 25 07:15:52 2025] RIP: 0010:intel_idle+0x55/0x90
[Do Sep 25 07:15:52 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6
[Do Sep 25 07:15:52 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046
[Do Sep 25 07:15:52 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
[Do Sep 25 07:15:52 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002
[Do Sep 25 07:15:52 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e
[Do Sep 25 07:15:52 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0
[Do Sep 25 07:15:52 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000
[Do Sep 25 07:15:52 2025] FS:  0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000
[Do Sep 25 07:15:52 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Do Sep 25 07:15:52 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0
[Do Sep 25 07:15:52 2025] Call Trace:
[Do Sep 25 07:15:52 2025]  <TASK>
[Do Sep 25 07:15:52 2025]  cpuidle_enter_state+0x81/0x420
[Do Sep 25 07:15:52 2025]  cpuidle_enter+0x2d/0x40
[Do Sep 25 07:15:52 2025]  do_idle+0x1e5/0x240
[Do Sep 25 07:15:52 2025]  cpu_startup_entry+0x29/0x30
[Do Sep 25 07:15:52 2025]  rest_init+0xcc/0xd0
[Do Sep 25 07:15:52 2025]  start_kernel+0x74c/0x750
[Do Sep 25 07:15:52 2025]  x86_64_start_reservations+0x24/0x30
[Do Sep 25 07:15:52 2025]  x86_64_start_kernel+0x95/0xa0
[Do Sep 25 07:15:52 2025]  common_startup_64+0x13e/0x141
[Do Sep 25 07:15:52 2025]  </TASK>
[Do Sep 25 07:15:54 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0.
[Do Sep 25 07:15:54 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[Do Sep 25 07:15:54 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019
[Do Sep 25 07:15:54 2025] RIP: 0010:intel_idle+0x55/0x90
[Do Sep 25 07:15:54 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6
[Do Sep 25 07:15:54 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046
[Do Sep 25 07:15:54 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
[Do Sep 25 07:15:54 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002
[Do Sep 25 07:15:54 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e
[Do Sep 25 07:15:54 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0
[Do Sep 25 07:15:54 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000
[Do Sep 25 07:15:54 2025] FS:  0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000
[Do Sep 25 07:15:54 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Do Sep 25 07:15:54 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0
[Do Sep 25 07:15:54 2025] Call Trace:
[Do Sep 25 07:15:54 2025]  <TASK>
[Do Sep 25 07:15:54 2025]  cpuidle_enter_state+0x81/0x420
[Do Sep 25 07:15:54 2025]  cpuidle_enter+0x2d/0x40
[Do Sep 25 07:15:54 2025]  do_idle+0x1e5/0x240
[Do Sep 25 07:15:54 2025]  cpu_startup_entry+0x29/0x30
[Do Sep 25 07:15:54 2025]  rest_init+0xcc/0xd0
[Do Sep 25 07:15:54 2025]  start_kernel+0x74c/0x750
[Do Sep 25 07:15:54 2025]  x86_64_start_reservations+0x24/0x30
[Do Sep 25 07:15:54 2025]  x86_64_start_kernel+0x95/0xa0
[Do Sep 25 07:15:54 2025]  common_startup_64+0x13e/0x141
[Do Sep 25 07:15:54 2025]  </TASK>
[Do Sep 25 07:15:56 2025] NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0.
[Do Sep 25 07:15:56 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[Do Sep 25 07:15:56 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019
[Do Sep 25 07:15:56 2025] RIP: 0010:intel_idle+0x55/0x90
[Do Sep 25 07:15:56 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6
[Do Sep 25 07:15:56 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046
[Do Sep 25 07:15:56 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
[Do Sep 25 07:15:56 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002
[Do Sep 25 07:15:56 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e
[Do Sep 25 07:15:56 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0
[Do Sep 25 07:15:56 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000
[Do Sep 25 07:15:56 2025] FS:  0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000
[Do Sep 25 07:15:56 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Do Sep 25 07:15:56 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0
[Do Sep 25 07:15:56 2025] Call Trace:
[Do Sep 25 07:15:56 2025]  <TASK>
[Do Sep 25 07:15:56 2025]  cpuidle_enter_state+0x81/0x420
[Do Sep 25 07:15:56 2025]  cpuidle_enter+0x2d/0x40
[Do Sep 25 07:15:56 2025]  do_idle+0x1e5/0x240
[Do Sep 25 07:15:56 2025]  cpu_startup_entry+0x29/0x30
[Do Sep 25 07:15:56 2025]  rest_init+0xcc/0xd0
[Do Sep 25 07:15:56 2025]  start_kernel+0x74c/0x750
[Do Sep 25 07:15:56 2025]  x86_64_start_reservations+0x24/0x30
[Do Sep 25 07:15:56 2025]  x86_64_start_kernel+0x95/0xa0
[Do Sep 25 07:15:56 2025]  common_startup_64+0x13e/0x141
[Do Sep 25 07:15:56 2025]  </TASK>
[Do Sep 25 07:15:58 2025] NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0.
[Do Sep 25 07:15:58 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[Do Sep 25 07:15:58 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019
[Do Sep 25 07:15:58 2025] RIP: 0010:intel_idle+0x55/0x90
[Do Sep 25 07:15:58 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6
[Do Sep 25 07:15:58 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046
[Do Sep 25 07:15:58 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
[Do Sep 25 07:15:58 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002
[Do Sep 25 07:15:58 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e
[Do Sep 25 07:15:58 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0
[Do Sep 25 07:15:58 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000
[Do Sep 25 07:15:58 2025] FS:  0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000
[Do Sep 25 07:15:58 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Do Sep 25 07:15:58 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0
[Do Sep 25 07:15:58 2025] Call Trace:
[Do Sep 25 07:15:58 2025]  <TASK>
[Do Sep 25 07:15:58 2025]  cpuidle_enter_state+0x81/0x420
[Do Sep 25 07:15:58 2025]  cpuidle_enter+0x2d/0x40
[Do Sep 25 07:15:58 2025]  do_idle+0x1e5/0x240
[Do Sep 25 07:15:58 2025]  cpu_startup_entry+0x29/0x30
[Do Sep 25 07:15:58 2025]  rest_init+0xcc/0xd0
[Do Sep 25 07:15:58 2025]  start_kernel+0x74c/0x750
[Do Sep 25 07:15:58 2025]  x86_64_start_reservations+0x24/0x30
[Do Sep 25 07:15:58 2025]  x86_64_start_kernel+0x95/0xa0
[Do Sep 25 07:15:58 2025]  common_startup_64+0x13e/0x141
[Do Sep 25 07:15:58 2025]  </TASK>
[Do Sep 25 07:16:00 2025] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 7623994708 wd_nsec: 7623993107

Guess I'll remove all customization next.

Best regards,

Thorsten

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Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 10:30 +0200
  Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 11:10 +0200
    Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-22 19:40 +0200
      Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-23 12:40 +0200
        Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-24 19:30 +0200
          Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-25 00:20 +0200
            Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-25 17:30 +0200

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