The output of "kern.geom.confxml" would also be useful.  Also, I
suggest that we move this discussion into Bugzilla.

On Sun, Dec 28, 2025 at 11:33 AM Mark Millard <[email protected]> wrote:
>
> On Dec 28, 2025, at 08:54, Mark Millard <[email protected]> wrote:
>
> > [Resend including freebsd-arm.]
> >
> > On Dec 28, 2025, at 08:48, Mark Millard <[email protected]> wrote:
> >
> > [email protected] <js_at_FreeBSD.org> wrote on
> > Date: Sun, 28 Dec 2025 11:01:59 UTC :
> >
> >> I'll take a look at it and try to setup a reproducer, unfortunately my
> >> time is a bit limited during the holidays so I can't promise any quick
> >> fixes right now.
> >>
> >> Could you share the output of
> >>
> >> gpart --libxo:JP show
> >>
> >> with me? If possible.
> >
> > On the Orange Pi Plus 2e (Cortex-A7, not aarch64,
> > just armv7):
> >
> > # gpart --libxo:JP show
> > Segmentation fault (core dumped)
> >
> > I'll note that the 0x6e480000 in r0 that is shown
> > later below is the same failing address reported
> > in my original list submittal about the issue.
> >
> >
> > For reference:
> >
> > (gdb) bt
> > #0  strlen () at /usr/src/lib/libc/arm/string/strlen.S:46
> > #1  0x20151020 in xo_format_string (xop=0x2009b120, xbp=0x2009b150, 
> > flags=4096, xfp=0xbfbfd1f8) at /usr/src/contrib/libxo/libxo/libxo.c:2966
> > #2  xo_do_format_field (xop=<optimized out>, xop@entry=0x2009b120, 
> > xbp=0x2009b150, fmt=fmt@entry=0xbfbfd268 "%s", flen=<optimized out>, 
> > flags=4096) at /usr/src/contrib/libxo/libxo/libxo.c:3503
> > #3  0x2014d0a8 in xo_simple_field (xop=0x2009b120, encode_only=0, 
> > value=0x0, vlen=0, fmt=0xbfbfd268 "%s", flen=2, flags=4096) at 
> > /usr/src/contrib/libxo/libxo/libxo.c:3817
> > #4  xo_format_value (xop=<optimized out>, xop@entry=0x2009b120, 
> > name=name@entry=0x204bf931 "state}\n", nlen=nlen@entry=5, value=0x0, 
> > vlen=0, fmt=0xbfbfd268 "%s", flen=2, encoding=0x0, elen=0,
> >   flags=4096) at /usr/src/contrib/libxo/libxo/libxo.c:4535
> > #5  0x20148710 in xo_do_emit_fields (xop=<optimized out>, 
> > xop@entry=0x2009b120, fields=<optimized out>, fields@entry=0xbfbfd768, 
> > max_fields=max_fields@entry=17, fmt=<optimized out>)
> >   at /usr/src/contrib/libxo/libxo/libxo.c:6372
> > #6  0x201476a0 in xo_do_emit (xop=xop@entry=0x2009b120, flags=<optimized 
> > out>, fmt=fmt@entry=0x204bf8e3 "=>{t:start/%*jd}  {t:sectors/%*jd}  
> > {t:name/%*s}  {:scheme}  ({h:size/%ld}){t:state}\n")
> >   at /usr/src/contrib/libxo/libxo/libxo.c:6551
> > #7  0x20147840 in xo_emit (fmt=0x204bf8e3 "=>{t:start/%*jd}  
> > {t:sectors/%*jd}  {t:name/%*s}  {:scheme}  ({h:size/%ld}){t:state}\n") at 
> > /usr/src/contrib/libxo/libxo/libxo.c:6622
> > #8  0x204d1fd4 in gpart_show_geom (gp=gp@entry=0x20089168, 
> > element=element@entry=0x204bfe51 "type", 
> > show_providers=show_providers@entry=0) at 
> > /usr/src/lib/geom/part/geom_part.c:654
> > #9  0x204d1048 in gpart_show (req=0x20089000, fl=<optimized out>) at 
> > /usr/src/lib/geom/part/geom_part.c:793
> > #10 0x000230dc in run_command (argc=0, argv=<optimized out>) at 
> > /usr/src/sbin/geom/core/geom.c:497
> > #11 0x00022308 in main (argc=1, argv=0xbfbfed10) at 
> > /usr/src/sbin/geom/core/geom.c:861
> > (gdb) list
> > . . .
> >
>
> I'll note that the details are different, but I get failures
> in an armv7 chroot on aarch64 that supports armv7 code. So
> that is another type of environment that might be of use based
> on pkgbase distribution materials.
>
> Your --libxo:JP command in that context gets some output
> before also getting a segmentation fault:
>
> # gpart --libxo:JP show
> {
>   "__version": "1",
>   "PART": [
>     {
>       "start": 34,
>       "sectors": 1000215149,
>       "name": "nda0",
>       "scheme": "GPT",
>       "size": 2,
>       "state": "(null)",
>       "partitions": [
>         {
>           "start": 34,
>           "sectors": 2014,
>           "free": true,
>           "size": 2
>         },
>         {
>           "start": 2048,
>           "sectors": 532480,
>           "index": 1,
>           "name": "nda0p1",
>           "type": "efi",
>           "label": "EFI system partition",
>           "rawtype": "c12a7328-f81f-11d2-ba4b-00a0c93ec93b",
>           "size": 541854500
>         },
>         {
>           "start": 534528,
>           "sectors": 32768,
>           "index": 2,
>           "name": "nda0p2",
>           "type": "ms-reserved",
>           "label": "Microsoft reserved partition",
>           "rawtype": "e3c9e316-0b5c-4db8-817d-f92df00215ae",
>           "size": 541854500
>         },
>         {
>           "start": 567296,
>           "sectors": 997287936,
>           "index": 3,
>           "name": "nda0p3",
>           "type": "ms-basic-data",
>           "label": "Basic data partition",
>           "rawtype": "ebd0a0a2-b9e5-4433-87c0-68b6b72699c7",
>           "size": 541854500
>         },
>         {
>           "start": 997855232,
>           "sectors": 2359296,
>           "index": 4,
>           "name": "nda0p4",
>           "type": "ms-recovery",
>           "label": "(null)",
>           "rawtype": "de94bba4-06d1-4d40-a16a-bfd50179d6ac",
>           "size": 541854500
>         },
>         {
>           "start": 1000214528,
>           "sectors": 655,
>           "free": true,
>           "size": 2
>         }
>       ]
>     },
>     {
>       "start": 34,
>       "sectors": 2930277101,
>       "name": "da0",
>       "scheme": "GPT",
>       "size": 0,
>       "state": "(null)",
>       "partitions": [
>         {
>           "start": 34,
>           "sectors": 32734,
>           "free": true,
>           "size": 0
>         },
>         {
>           "start": 32768,
>           "sectors": 501760,
>           "index": 1,
>           "name": "da0p1",
>           "type": "efi",
>           "label": "PBaseEFI",
>           "rawtype": "c12a7328-f81f-11d2-ba4b-00a0c93ec93b",
>           "size": 541854500
>         },
>         {
>           "start": 534528,
>           "sectors": 20971520,
>           "index": 2,
>           "name": "da0p2",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp10",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 21506048,
>           "sectors": 29360128,
>           "index": 3,
>           "name": "da0p3",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp14",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 50866176,
>           "sectors": 33554432,
>           "index": 4,
>           "name": "da0p4",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp16",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>           "type": "freebsd-swap",
>           "label": "PBaseSwp32",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 151529472,
>           "sectors": 96468992,
>           "index": 6,
>           "name": "da0p6",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp46",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 247998464,
>           "sectors": 268435456,
>           "index": 7,
>           "name": "da0p7",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp128",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 516433920,
>           "sectors": 7340032,
>           "index": 8,
>           "name": "da0p8",
>           "type": "freebsd-swap",
>           "label": "PBaseSwp3p5",
>           "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 523773952,
>           "sectors": 13096960,
>           "free": true,
>           "size": 0
>         },
>         {
>           "start": 536870912,
>           "sectors": 2357198848,
>           "index": 9,
>           "name": "da0p9",
>           "type": "freebsd-ufs",
>           "label": "PBaseUFS",
>           "rawtype": "516e7cb6-6ecf-11d6-8ff8-00022d09712b",
>           "size": 541854500
>         },
>         {
>           "start": 2894069760,
>           "sectors": 36207375,
>           "free": true,
>           "size": 0
>         }
>       ]
>     }Segmentation fault (core dumped)
>
> # gpart show
> =>        34  1000215149  nda0  GPT  (2)(null)
>           34        2014        - free -  (2)
>         2048      532480     1  efi  (517M)
>       534528       32768     2  ms-reserved  (517M)
>       567296   997287936     3  ms-basic-data  (517M)
>    997855232     2359296     4  ms-recovery  (517M)
>   1000214528         655        - free -  (2)
>
> =>        34  2930277101  da0  GPT  (0)(null)
>           34       32734       - free -  (0)
>        32768      501760    1  efi  (517M)
>       534528    20971520    2  freebsd-swap  (517M)
>     21506048    29360128    3  freebsd-swap  (517M)
>     50866176    33554432    4  freebsd-swap  (517M)
>     84420608    67108864    5  freebsd-swap  (517M)
>    151529472    96468992    6  freebsd-swap  (517M)
>    247998464   268435456    7  freebsd-swap  (517M)
>    516433920     7340032    8  freebsd-swap  (517M)
>    523773952    13096960       - free -  (0)
>    536870912  2357198848    9  freebsd-ufs  (517M)
>   2894069760    36207375       - free -  (0)
>
> Segmentation fault (core dumped)
>
> From an aarch64 context instead pf the armv7 chroot:
>
> # gpart show
> you have mail
> =>        34  1000215149  nda0  GPT  (477G)
>           34        2014        - free -  (1007K)
>         2048      532480     1  efi  (260M)
>       534528       32768     2  ms-reserved  (16M)
>       567296   997287936     3  ms-basic-data  (476G)
>    997855232     2359296     4  ms-recovery  (1G)
>   1000214528         655        - free -  (328K)
>
> =>        34  2930277101  da0  GPT  (1T)
>           34       32734       - free -  (16M)
>        32768      501760    1  efi  (245M)
>       534528    20971520    2  freebsd-swap  (10G)
>     21506048    29360128    3  freebsd-swap  (14G)
>     50866176    33554432    4  freebsd-swap  (16G)
>     84420608    67108864    5  freebsd-swap  (32G)
>    151529472    96468992    6  freebsd-swap  (46G)
>    247998464   268435456    7  freebsd-swap  (128G)
>    516433920     7340032    8  freebsd-swap  (4G)
>    523773952    13096960       - free -  (6G)
>    536870912  2357198848    9  freebsd-ufs  (1T)
>   2894069760    36207375       - free -  (17G)
>
> Here is a "diff -u" of the libxo:JP outputs:
>
> # diff -u gpart_show_armv7_failure_libxo_jp.txt 
> gpart_show_aarch64_good_libxo_jp.txt
> --- gpart_show_armv7_failure_libxo_jp.txt       2025-12-28 10:27:57.985558000 
> -0800
> +++ gpart_show_aarch64_good_libxo_jp.txt        2025-12-28 10:28:41.456968000 
> -0800
> @@ -7,14 +7,14 @@
>        "sectors": 1000215149,
>        "name": "nda0",
>        "scheme": "GPT",
> -      "size": 2,
> -      "state": "(null)",
> +      "size": 512110190592,
> +      "state": "",
>        "partitions": [
>          {
>            "start": 34,
>            "sectors": 2014,
>            "free": true,
> -          "size": 2
> +          "size": 1031168
>          },
>          {
>            "start": 2048,
> @@ -24,7 +24,7 @@
>            "type": "efi",
>            "label": "EFI system partition",
>            "rawtype": "c12a7328-f81f-11d2-ba4b-00a0c93ec93b",
> -          "size": 541854500
> +          "size": 272629760
>          },
>          {
>            "start": 534528,
> @@ -34,7 +34,7 @@
>            "type": "ms-reserved",
>            "label": "Microsoft reserved partition",
>            "rawtype": "e3c9e316-0b5c-4db8-817d-f92df00215ae",
> -          "size": 541854500
> +          "size": 16777216
>          },
>          {
>            "start": 567296,
> @@ -44,7 +44,7 @@
>            "type": "ms-basic-data",
>            "label": "Basic data partition",
>            "rawtype": "ebd0a0a2-b9e5-4433-87c0-68b6b72699c7",
> -          "size": 541854500
> +          "size": 510611423232
>          },
>          {
>            "start": 997855232,
> @@ -54,13 +54,13 @@
>            "type": "ms-recovery",
>            "label": "(null)",
>            "rawtype": "de94bba4-06d1-4d40-a16a-bfd50179d6ac",
> -          "size": 541854500
> +          "size": 1207959552
>          },
>          {
>            "start": 1000214528,
>            "sectors": 655,
>            "free": true,
> -          "size": 2
> +          "size": 335360
>          }
>        ]
>      },
> @@ -69,14 +69,14 @@
>        "sectors": 2930277101,
>        "name": "da0",
>        "scheme": "GPT",
> -      "size": 0,
> -      "state": "(null)",
> +      "size": 1500301910016,
> +      "state": "",
>        "partitions": [
>          {
>            "start": 34,
>            "sectors": 32734,
>            "free": true,
> -          "size": 0
> +          "size": 16759808
>          },
>          {
>            "start": 32768,
> @@ -86,7 +86,7 @@
>            "type": "efi",
>            "label": "PBaseEFI",
>            "rawtype": "c12a7328-f81f-11d2-ba4b-00a0c93ec93b",
> -          "size": 541854500
> +          "size": 256901120
>          },
>          {
>            "start": 534528,
> @@ -96,7 +96,7 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp10",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 10737418240
>          },
>          {
>            "start": 21506048,
> @@ -106,7 +106,7 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp14",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 15032385536
>          },
>          {
>            "start": 50866176,
> @@ -116,12 +116,17 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp16",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 17179869184
>          },
> +        {
> +          "start": 84420608,
> +          "sectors": 67108864,
> -          "size": 541854500
> +          "size": 34359738368
>          },
>          {
>            "start": 151529472,
> @@ -131,7 +136,7 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp46",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 49392123904
>          },
>          {
>            "start": 247998464,
> @@ -141,7 +146,7 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp128",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 137438953472
>          },
>          {
>            "start": 516433920,
> @@ -151,13 +156,13 @@
>            "type": "freebsd-swap",
>            "label": "PBaseSwp3p5",
>            "rawtype": "516e7cb5-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 3758096384
>          },
>          {
>            "start": 523773952,
>            "sectors": 13096960,
>            "free": true,
> -          "size": 0
> +          "size": 6705643520
>          },
>          {
>            "start": 536870912,
> @@ -167,13 +172,16 @@
>            "type": "freebsd-ufs",
>            "label": "PBaseUFS",
>            "rawtype": "516e7cb6-6ecf-11d6-8ff8-00022d09712b",
> -          "size": 541854500
> +          "size": 1206885810176
>          },
>          {
>            "start": 2894069760,
>            "sectors": 36207375,
>            "free": true,
> -          "size": 0
> +          "size": 18538176000
>          }
>        ]
> -    }Segmentation fault (core dumped)
> +    }
> +  ]
> +}
> +
>
>
>
>
> ===
> Mark Millard
> marklmi at yahoo.com
>
>

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