[Bug 220631] New: kernel crash in kvm_intel module on Xeon Silver 4314s

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220631

               URL: https://bugzilla.proxmox.com/show_bug.cgi?id=6767
            Bug ID: 220631
           Summary: kernel crash in kvm_intel module on Xeon Silver 4314s
           Product: Virtualization
           Version: unspecified
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: f.gruenbichler@proxmox.com
        Regression: No

Created attachment 308754
  --> https://bugzilla.kernel.org/attachment.cgi?id=308754&action=edit
Qemu commandline

one of our users reports a crash in kvm_intel with Windows guests and live
migration. the source and target hosts are identical hardware, kernel version
and bios version wise:

- Supermicro SYS-120C-TN10R servers with Xeon Silver 4314s
- microcode       : 0xd000404
- 6.14.8-2-pve (based on Ubuntu 6.14.0-26.26 and upstream stable 6.14.
- guest OS: Windows 11 24H2

the Qemu commandline and dmesg output is attached, the user is CCed to this
bug. unfortunately, we don't have the hardware to reproduce and bisect
ourselves.

this is likely a regression, since the user reports running into the issue
since upgrading to PVE 9, which means switching from kernel 6.8.x to 6.14.x

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