[Bug]: Debian 13: rcu: blocking rcu_node structures (reboot / shutdown errors)

[octopusnz]

Version

7.2.16

Host OS Type

Windows

Host OS name + version

Windows 10 22H2

Host Architecture

x86

Guest OS Type

Linux

Guest Architecture

x86

Guest OS name + version

Debian 13.6

Component

Other

What happened?

When rebooting the running system many errors appeared and I had to manually kill the VM to shutdown and reboot.

Snippit below - attached a full log from the last few cycles and a VBox.log in case it is useful.

errors.log

VBox.log

Sep 08 23:08:17 debian kernel:  </TASK>
Sep 08 23:08:17 debian kernel:  common_startup_64+0x13e/0x141
Sep 08 23:08:17 debian kernel:  start_secondary+0x11e/0x140
Sep 08 23:08:17 debian kernel:  cpu_startup_entry+0x29/0x30
Sep 08 23:08:17 debian kernel:  do_idle+0x269/0x2a0
Sep 08 23:08:17 debian kernel:  default_idle_call+0x29/0x100
Sep 08 23:08:17 debian kernel:  default_idle+0x9/0x20
Sep 08 23:08:17 debian kernel:  <TASK>
Sep 08 23:08:17 debian kernel: Call Trace:
Sep 08 23:08:17 debian kernel: CR2: 00007fd39d48d010 CR3: 0000000101ef0005 CR4: 00000000000706f0
Sep 08 23:08:17 debian kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 08 23:08:17 debian kernel: FS:  0000000000000000(0000) GS:ffff8934c1f80000(0000) knlGS:0000000000000000
Sep 08 23:08:17 debian kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Sep 08 23:08:17 debian kernel: R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000003
Sep 08 23:08:17 debian kernel: RBP: ffff8932c03bcc80 R08: ffff8934c1fa5ea0 R09: ffff8934c1ea6521
Sep 08 23:08:17 debian kernel: RDX: 0000000000000000 RSI: 0000000000000083 RDI: 00000000128b0374
Sep 08 23:08:17 debian kernel: RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000001
Sep 08 23:08:17 debian kernel: RSP: 0018:ffffcd11000d3ed8 EFLAGS: 00000242
Sep 08 23:08:17 debian kernel: Code: 09 e9 95 0d 01 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d f5 77 30 00 fb f4 <c3> cc cc cc>
Sep 08 23:08:17 debian kernel: RIP: 0010:pv_native_safe_halt+0xf/0x20
Sep 08 23:08:17 debian kernel: Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
Sep 08 23:08:17 debian kernel: Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
Sep 08 23:08:17 debian kernel: CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Tainted: G        W  OE      6.12.107+deb13-amd64 #1  Debian 6.12.107-1
Sep 08 23:08:17 debian kernel: NMI backtrace for cpu 3
Sep 08 23:08:17 debian kernel: Sending NMI from CPU 2 to CPUs 3:
Sep 08 23:08:17 debian kernel: rcu: blocking rcu_node structures (internal RCU debug):
Sep 08 23:08:17 debian kernel: rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 3-...D } 67683663 jiffies s: 717 root: 0x8/.
Sep 08 23:07:56 debian systemd[1]: NetworkManager.service: Processes still around after SIGKILL. Ignoring.
Sep 08 23:07:56 debian systemd[1]: polkit.service: Processes still around after SIGKILL. Ignoring.
Sep 08 23:07:28 debian systemd[1]: user-runtime-dir@1000.service: Processes still around after SIGKILL. Ignoring.
Sep 08 23:07:14 debian kernel:  </TASK>
Sep 08 23:07:14 debian kernel:  ret_from_fork_asm+0x1a/0x30
Sep 08 23:07:14 debian kernel:  ? __pfx_kthread+0x10/0x10
Sep 08 23:07:14 debian kernel:  ret_from_fork+0x34/0x50

See attached errors.log for full details.

How can we reproduce this?

Debian 13.6, Windows 10 Host.
Reboot - explosion.

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.