[Bug 252275] pci: Bad tailq NEXT(0xffffffff81cde660->tqh_last) != NULL when using custom patch

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252275

            Bug ID: 252275
           Summary: pci: Bad tailq NEXT(0xffffffff81cde660->tqh_last) !=
                    NULL when using custom patch
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: neel at neelc.org

I have a custom patch which I believe is required to use NVMe for a new laptop
(HP Spectre x360 13t-aw200), and I get an kernel panic whenever I use the
patch. This Spectre (and probably most 11th gen Intel "Evo" laptops) force NVMe
RAID.

The panic is: Bad tailq NEXT(0xffffffff81cde660->tqh_last) != NULL

Full trace: https://imgur.com/a/XUQksOi

The custom patch is:

--- a/sys/dev/vmd/vmd.c
+++ b/sys/dev/vmd/vmd.c
@@ -66,13 +66,20 @@ struct vmd_type {
 #define INTEL_VENDOR_ID                0x8086
 #define INTEL_DEVICE_ID_VMD    0x201d
 #define INTEL_DEVICE_ID_VMD2   0x28c0
+#define INTEL_DEVICE_ID_VMD3   0x9a0b

 static struct vmd_type vmd_devs[] = {
         { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD,  "Intel Volume Management
Device" },
         { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD2, "Intel Volume Management
Device" },
+        { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD3, "Intel Volume Management
Device" },
         { 0, 0, NULL }

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