Got a dump with kmem_flags set, but I am not sure if this is the same issue, as 
I applied the patch to a more recent build.

panic[cpu0]/thread=ffffff000f5e7c40:
BAD TRAP: type=e (#pf Page fault) rp=ffffff000f5e7790 addr=0 occurred in module 
"zfs" due to a NULL pointer dereference


zpool-zones:
#pf Page fault
Bad kernel fault at addr=0x0
pid=89, pc=0xfffffffff7d9975b, sp=0xffffff000f5e7880, eflags=0x10282
cr0: 8005003b<pg,wp,ne,et,ts,mp,pe> cr4: 6f8<xmme,fxsr,pge,mce,pae,pse,de>
cr2: 0
cr3: 1dc00000
cr8: c

        rdi:                0 rsi:            20000 rdx:            80041
        rcx:                0  r8:                0  r9:                0
        rax:            20000 rbx:                0 rbp: ffffff000f5e78b0
        r10: fffffffffb8580d8 r11: feedfacefeedface r12:            20000
        r13: ffffff03ecaeb000 r14: ffffff03eee62800 r15: ffffff000f5e7ad0
        fsb:                0 gsb: fffffffffbc399c0  ds:               4b
         es:               4b  fs:                0  gs:              1c3
        trp:                e err:                0 rip: fffffffff7d9975b
         cs:               30 rfl:            10282 rsp: ffffff000f5e7880
         ss:               38

ffffff000f5e7670 unix:real_mode_stop_cpu_stage2_end+b30c ()
ffffff000f5e7780 unix:trap+e08 ()
ffffff000f5e7790 unix:_cmntrap+e6 ()
ffffff000f5e78b0 zfs:abd_borrow_buf+1b ()
ffffff000f5e78f0 zfs:abd_borrow_buf_copy+23 ()
ffffff000f5e7930 zfs:vdev_disk_io_start+c7 ()
ffffff000f5e7990 zfs:zio_vdev_io_start+b1 ()
ffffff000f5e79c0 zfs:zio_execute+7f ()
ffffff000f5e7a00 zfs:vdev_queue_io_done+68 ()
ffffff000f5e7a40 zfs:zio_vdev_io_done+80 ()
ffffff000f5e7a70 zfs:zio_execute+7f ()
ffffff000f5e7b30 genunix:taskq_thread+2d0 ()
ffffff000f5e7b40 unix:thread_start+8 ()

Dump available at https://www.magentacloud.de/lnk/sprBVjAK



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