[Bug 297062] running "zpool import" with geom_zero loaded leads to kernel panic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297062

            Bug ID: 297062
           Summary: running "zpool import" with geom_zero loaded leads to
                    kernel panic
           Product: Base System
           Version: 15.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: [email protected]
          Reporter: [email protected]

running on 
15.1-RELEASE-p1 FreeBSD 15.1-RELEASE-p1 #0 -dirty: Tue Jun 30 03:16:39 UTC 2026
    [email protected]:/usr/obj/usr/src/amd64.amd64/sys/GENERIC
amd64

on 
CPU: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz (3192.68-MHz K8-class CPU) (32
GB RAM)
and also on

Intel(R) Celeron(R) CPU N3150 @ 1.60GHz (16 GB of RAM)

with loading 
geom_zero_load="YES"
through 
/boot/loader.conf

leads to a kernel panic, when executing 
zpool import after logging in.

Jul 22 10:08:54 machine syslogd: kernel boot file is /boot/kernel/kernel
Jul 22 10:08:54 machine kernel: panic: vm_fault_lookup: fault on nofault entry,
addr: 0xfffffe00d40e4000
Jul 22 10:08:54 machine kernel: cpuid = 3
Jul 22 10:08:54 machine kernel: time = 1784707653
Jul 22 10:08:54 machine kernel: KDB: stack backtrace:
Jul 22 10:08:54 machine kernel: #0 0xffffffff80bd678d at kdb_backtrace+0x5d
Jul 22 10:08:54 machine kernel: #1 0xffffffff80b872f6 at vpanic+0x136
Jul 22 10:08:54 machine kernel: #2 0xffffffff80b871b3 at panic+0x43
Jul 22 10:08:54 machine kernel: #3 0xffffffff80f2613e at vm_fault+0x190e
Jul 22 10:08:54 machine kernel: #4 0xffffffff80f24741 at vm_fault_trap+0x81
Jul 22 10:08:54 machine kernel: #5 0xffffffff81098e4c at trap_pfault+0x1fc
Jul 22 10:08:54 machine kernel: #6 0xffffffff8106f188 at calltrap+0x8
Jul 22 10:08:54 machine kernel: #7 0xffffffff8109a485 at uiomove_fromphys+0x175
Jul 22 10:08:54 machine kernel: #8 0xffffffff82b7d270 at g_zero_start+0x170
Jul 22 10:08:54 machine kernel: #9 0xffffffff80abcacc at g_io_request+0x1dc
Jul 22 10:08:54 machine kernel: #10 0xffffffff80c4b40f at aio_queue_file+0x60f
Jul 22 10:08:54 machine kernel: #11 0xffffffff80c48cae at aio_aqueue+0x64e
Jul 22 10:08:54 machine kernel: #12 0xffffffff80c49375 at kern_lio_listio+0x335
Jul 22 10:08:54 machine kernel: #13 0xffffffff80c497aa at sys_lio_listio+0xca
Jul 22 10:08:54 machine kernel: #14 0xffffffff81099606 at amd64_syscall+0x126
Jul 22 10:08:54 machine kernel: #15 0xffffffff8106fa7b at
fast_syscall_common+0xf8
Jul 22 10:08:54 machine kernel: Timeout initializing vt_vga
Jul 22 10:08:54 machine kernel: Uptime: 2m56s
Jul 22 10:08:54 machine kernel: Dumping 707 out of 16229
MB:..3%..12%..21%..32%..41%..52%..62%..71%..82%..91%---<<BOOT>>---
Jul 22 10:08:54 machine kernel: Copyright (c) 1992-2025 The FreeBSD Project.

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