[Bug 281520] zfs panic: VERIFY(!txg_list_member(&vd->vdev_ms_list, msp, t)) failed after install

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281520

            Bug ID: 281520
           Summary: zfs panic: VERIFY(!txg_list_member(&vd->vdev_ms_list,
                    msp, t)) failed after install
           Product: Base System
           Version: 15.0-CURRENT
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: dch@freebsd.org

repeatable panic on 1st reboot after install

cpuid = 1
time = 3
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x38
vpanic() at vpanic+0x1ac
spl_panic() at spl_panic+0x44
metaslab_fini() at metaslab_fini+0x474
vdev_metaslab_init() at vdev_metaslab_init+0x208
vdev_load() at vdev_load+0x78c
vdev_load_child() at vdev_load_child+0x14
taskq_run() at taskq_run+0x24
taskqueue_run_locked() at taskqueue_run_locked+0x17c
taskqueue_thread_loop() at taskqueue_thread_loop+0xc0
fork_exit() at fork_exit+0x78
fork_trampoline() at fork_trampoline+0x18
KDB: enter: panic
[ thread pid 5 tid 100150 ]
Stopped at      kdb_enter+0x48: str     xzr, [x19, #2048]
db>

image is a built-from-sources (make release ...) arm64 using makefs
- FreeBSD-15.0-CURRENT-arm64-aarch64-20240910-0871d4d-zfs

will try to reproduce on "vanilla" CURRENT shortly.

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