[Bug 272762] zone_timeout / bucket_drain : Fatal trap 9: general protection fault while in kernel mode

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272762

            Bug ID: 272762
           Summary: zone_timeout / bucket_drain : Fatal trap 9: general
                    protection fault while in kernel mode
           Product: Base System
           Version: 13.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: pen@lysator.liu.se

Got a sudden panic & reboot on our test server earlier today running FreeBSD
13.2-RELEASE-p1 while I was running some "make buildworld" on it:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 36; apic id = 30
instruction pointer     = 0x20:0xffffffff80f493c9
stack pointer           = 0x28:0xfffffe026bc5ad10
frame pointer           = 0x28:0xfffffe026bc5ad50
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 (thread taskq)
trap number             = 9
panic: general protection fault
cpuid = 36
time = 1690450268
KDB: stack backtrace:
#0 0xffffffff80c53e15 at kdb_backtrace+0x65
#1 0xffffffff80c06791 at vpanic+0x151
#2 0xffffffff80c06633 at panic+0x43
#3 0xffffffff810b1fa7 at trap_fatal+0x387
#4 0xffffffff81088f88 at calltrap+0x8
#5 0xffffffff80f4e48a at bucket_drain+0xda
#6 0xffffffff80f4e82a at bucket_cache_reclaim_domain+0x30a
#7 0xffffffff80f4eef9 at zone_timeout+0x269
#8 0xffffffff80f4ec1a at uma_timeout+0x5a
#9 0xffffffff80c689b1 at taskqueue_run_locked+0x191
#10 0xffffffff80c69c73 at taskqueue_thread_loop+0xc3
#11 0xffffffff80bc2f9e at fork_exit+0x7e
#12 0xffffffff81089ffe at fork_trampoline+0xe
System is going down.
Uptime: 1d11h44m15s

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