https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285162

            Bug ID: 285162
           Summary: zfs panic: VERIFY3(lold->list_next != NULL) failed
           Product: Base System
           Version: 14.2-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: b...@freebsd.org
          Reporter: j...@mit.edu

Two days after updating from older 14.2 to 14.2
85b69389ce56f091281aa2543dea31950f68a054 my server crashed with

panic: VERIFY3(lold->list_next != NULL) failed (0x != 0x)

The vmcore file is truncated.  There is enough to for a stack trace:

#3  0xffffffff80b12019 in vpanic (
    fmt=0xffffffff82f16eac "VERIFY3(lold->list_next != NULL) failed (%px !=
%px)\n", 
    ap=ap@entry=0xfffffe03a16a4d40) at
/usr/home/jfc/freebsd/src/sys/kern/kern_shutdown.c:967
#4  0xffffffff82c4142a in spl_panic (file=<optimized out>, func=<optimized
out>, 
    line=<optimized out>, fmt=<unavailable>)
    at
/usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/os/freebsd/spl/spl_misc.c:99
#5  0xffffffff82c3f733 in list_remove (list=list@entry=0xfffffe03a21823f0, 
    object=object@entry=0xfffffe04bc899980)
    at
/usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/os/freebsd/spl/list.c:126
#6  0xffffffff82d9f601 in vdev_queue_pending_remove (vq=0xfffffe03a2182200, 
    zio=0xfffffe04bc899980)
    at
/usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/vdev_queue.c:592
#7  vdev_queue_io_done (zio=zio@entry=0xfffffe04bc899980)
    at
/usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/vdev_queue.c:982
#8  0xffffffff82e614eb in zio_vdev_io_done (zio=0xfffffe04bc899980)
    at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:4065
#9  0xffffffff82e597a7 in __zio_execute (zio=<optimized out>)
    at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:2350
#10 zio_execute (zio=<optimized out>)
    at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:2261
#11 0xffffffff80b75452 in taskqueue_run_locked
(queue=queue@entry=0xfffff801b3d18200)
    at /usr/home/jfc/freebsd/src/sys/kern/subr_taskqueue.c:518
#12 0xffffffff80b762e3 in taskqueue_thread_loop
(arg=arg@entry=0xfffff801059b6510)
    at /usr/home/jfc/freebsd/src/sys/kern/subr_taskqueue.c:830

The zio object was not saved in the dump.  vq->vq_vdev->vdev_guid is
11713793445848286627 corresponding to da1 in the zpool context below.

NAME         SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP   
HEALTH  ALTROOT
data        1.81T  1.46T   364G        -         -    41%    80%  1.03x   
ONLINE  -
  mirror-0  1.81T  1.46T   364G        -         -    41%  80.4%      -   
ONLINE
    da0     1.82T      -      -        -         -      -      -      -   
ONLINE
    da1     1.82T      -      -        -         -      -      -      -   
ONLINE
cache           -      -      -        -         -      -      -      -        
-
  nda0p5      40G  39.9G   139M        -         -     0%  99.7%      -   
ONLINE

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