Dump header from device: /dev/ada0p2
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 2013057024
  Blocksize: 512
  Compression: none
  Dumptime: 2023-05-27 03:41:03 +0100
  Hostname: mowa219-gjp4-8570p-freebsd
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 14.0-CURRENT #3 main-n263189-c2c9ac88c2bb-dirty: Sat May 27 01:04:23 BST 2023
    grahamperrin@mowa219-gjp4-8570p-freebsd:/usr/obj/usr/src/amd64.amd64/sys/GENERIC
  Panic String: VERIFY3(dev->l2ad_hand <= dev->l2ad_evict) failed (6704865280 <= 6704857600)

  Dump Parity: 4196367481
  Bounds: 2
  Dump Status: good

----

…

Unread portion of the kernel message buffer:
.
<118>.
<118>Terminated
<118>May 27 03:40:26 mowa219-gjp4-8570p-freebsd syslogd: exiting on signal 15
<6>wlan0: link state changed to DOWN
<118>Enter full pathname of shell or RETURN for /bin/sh: # mount -uw /
<118># zfs mount -a
<118># zpool offli# zfs mount -a# zpool online august gpt/cache-august
<118># zpool online august gpt/cache2-august
<118># zpool online august gpt/cache3-august
panic: VERIFY3(dev->l2ad_hand <= dev->l2ad_evict) failed (6704865280 <= 6704857600)

cpuid = 2
time = 1685155263
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00c6bd8c90
vpanic() at vpanic+0x150/frame 0xfffffe00c6bd8ce0
spl_panic() at spl_panic+0x3a/frame 0xfffffe00c6bd8d40
l2arc_feed_thread() at l2arc_feed_thread+0x2401/frame 0xfffffe00c6bd8ef0
fork_exit() at fork_exit+0x80/frame 0xfffffe00c6bd8f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00c6bd8f30
--- trap 0x2f2a2072, rip = 0x949504154415f4d, rsp = 0x7265747061644120, rbp = 0x52505f4253550965 ---
KDB: enter: panic
Uptime: 22m7s
Dumping 1919 out of 16260 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:59
59              __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct pcpu,
(kgdb) #0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:59
#1  doadump (textdump=textdump@entry=1)
    at /usr/src/sys/kern/kern_shutdown.c:407
#2  0xffffffff80b5102c in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:528
#3  0xffffffff80b5154d in vpanic (fmt=<optimized out>, 
    ap=ap@entry=0xfffffe00c6bd8d20) at /usr/src/sys/kern/kern_shutdown.c:972
#4  0xffffffff8205727a in spl_panic (file=<optimized out>, 
    func=<optimized out>, line=<unavailable>, fmt=<unavailable>)
    at /usr/src/sys/contrib/openzfs/module/os/freebsd/spl/spl_misc.c:103
#5  0xffffffff820b31e1 in l2arc_write_buffers (spa=0xfffffe0110b77000, 
    dev=0x0, target_sz=16777216)
    at /usr/src/sys/contrib/openzfs/module/zfs/arc.c:9445
#6  l2arc_feed_thread (unused=<optimized out>)
    at /usr/src/sys/contrib/openzfs/module/zfs/arc.c:9559
#7  0xffffffff80b077b0 in fork_exit (
    callout=0xffffffff820b0de0 <l2arc_feed_thread>, arg=0x0, 
    frame=0xfffffe00c6bd8f40) at /usr/src/sys/kern/kern_fork.c:1102
#8  <signal handler called>
#9  0x0949504154415f4d in ?? ()
Backtrace stopped: Cannot access memory at address 0x7265747061644120
(kgdb) 

------------------------------------------------------------------------
ps -axlww

UID   PID  PPID C PRI NI   VSZ               RSS MWCHAN   STAT TT      TIME COMMAND
  0     0     0 3 -16  0     0 18005604586963200 swapin   DLs   -   3:57.46 [kernel]
…