Re: armv7 main's gpart [show]: signal 11 core dump during boot, before login; xo_format_string_direct; official pkgbase distribution (kernel and world)
- Reply: bob prohaska : "Re: armv7 main's gpart [show]: signal 11 core dump during boot, before login; xo_format_string_direct; official pkgbase distribution (kernel and world)"
- In reply to: Mark Millard : "Re: armv7 main's gpart [show]: signal 11 core dump during boot, before login; xo_format_string_direct; official pkgbase distribution (kernel and world)"
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Date: Sun, 28 Dec 2025 17:44:54 UTC
Can someone with a FreeBSD 15 or 16 -CURRENT armv7 machine test if
they're also getting segfaults when running gpart show? Or better yet,
if someone has a test machine to lend me.
On 12/28/25 17:06, Mark Millard wrote:
> [minherit(0x2051e000,1100,INHERIT_ZERO) = 0 (0x0)
> might be involoved?]
>
> On Dec 28, 2025, at 00:23, Mark Millard <marklmi@yahoo.com> wrote:
>
>> On Dec 27, 2025, at 23:55, Mark Millard <marklmi@yahoo.com> wrote:
>>
>>> [Turns out: works on aarch64 kernel's armv7 support, fails
>>> on the armv7 native kernel, exact same world files on the
>>> exact same media.]
>>
>> I got that wrong: a large part of the output occurs before a
>> segmentation fault on the Windows Dev Kit 2023. But it has a
>> very different backtrace and the output before that has numerical
>> garbage values showing.
>>
>>>
>>> On Dec 27, 2025, at 23:35, Mark Millard <marklmi@yahoo.com> wrote:
>>>
>>>> On Dec 27, 2025, at 22:03, Mark Millard <marklmi@yahoo.com> wrote:
>>>>
>>>>> Context:
>>>>>
>>>>> # uname -apKU
>>>>> FreeBSD OPiP2E-RPi2v1p1 16.0-CURRENT FreeBSD 16.0-CURRENT main-n282732-939ac0c8fde2 GENERIC-NODEBUG arm armv7 1600007 1600007
>>>>>
>>>>> That is an official pkgbase distribution that I installed, not
>>>>> a personal build. pkgbase for main has world being a debug
>>>>> build, no matter which of the kernels one choses to boot.
>>>>> For pkgbase, 939ac0c8fde2 would be correct(?) for the kernel
>>>>> but might not be exact for the world: /usr/src/sys/ and
>>>>> /usr/src/ (without sys/) are from different times, last I
>>>>> knew anyway. Changes can happen between.
>>>>>
>>>>> During boot, the time on the Orange Pi Plus 2ed is bad so:
>>>>>
>>>>> # ls -lodT /gpart.core
>>>>> -rw------- 1 root wheel nodump 3174400 Jan 1 00:01:01 2010 /gpart.core
>>>>>
>>>>> Also, for pkgbase, a source file distributed can be newer
>>>>> for its time stamp than the program distributed that was
>>>>> based on the source file. Such happens below.
>>>>>
>>>>>
>>>>>
>>>>> Core was generated by `gpart show'.
>>>>> Program terminated with signal SIGSEGV, Segmentation fault.
>>>>> Address not mapped to object.
>>>>> #0 xo_format_string_direct (xop=xop@entry=0x2009b120, xbp=xbp@entry=0x2009b150, flags=flags@entry=4096, wcp=0x0, cp=0x6e480000 <error: Cannot access memory at address 0x6e480000>, len=-1, max=-1,
>>>>> need_enc=3, have_enc=2) at /usr/src/contrib/libxo/libxo/libxo.c:2715
>>>>>
>>>>> warning: Source file is more recent than executable.
>>>>> 2715 if (*cp == '\0')
>>>>> (gdb) bt
>>>>> #0 xo_format_string_direct (xop=xop@entry=0x2009b120, xbp=xbp@entry=0x2009b150, flags=flags@entry=4096, wcp=0x0, cp=0x6e480000 <error: Cannot access memory at address 0x6e480000>, len=-1, max=-1,
>>>>> need_enc=3, have_enc=2) at /usr/src/contrib/libxo/libxo/libxo.c:2715
>>>>> #1 0x20150908 in xo_format_string (xop=0x2009b120, xbp=0x2009b150, flags=4096, xfp=0xbfbfd280) at /usr/src/contrib/libxo/libxo/libxo.c:2982
>>>>> #2 xo_do_format_field (xop=<optimized out>, xop@entry=0x2009b120, xbp=0x2009b150, fmt=fmt@entry=0x20130635 "%s", flen=flen@entry=2, flags=4096) at /usr/src/contrib/libxo/libxo/libxo.c:3503
>>>>> #3 0x2014c69c in xo_simple_field (xop=0x2009b120, encode_only=0, value=0x0, vlen=0, fmt=0x20130635 "%s", flen=2, flags=<optimized out>) at /usr/src/contrib/libxo/libxo/libxo.c:3817
>>>>> #4 xo_format_value (xop=<optimized out>, xop@entry=0x2009b120, name=<optimized out>, name@entry=0x204bf931 "state}\n", nlen=<optimized out>, nlen@entry=5, value=0x0, vlen=0, fmt=0x20130635 "%s",
>>>>> flen=2, encoding=0x0, elen=0, flags=<optimized out>) at /usr/src/contrib/libxo/libxo/libxo.c:4373
>>>>> #5 0x20148710 in xo_do_emit_fields (xop=<optimized out>, xop@entry=0x2009b120, fields=<optimized out>, fields@entry=0xbfbfd7e8, 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=0xbfbfed90) at /usr/src/sbin/geom/core/geom.c:861
>>>>> (gdb) list
>>>>> 2710 for (;;) {
>>>>> 2711 if (len == 0)
>>>>> 2712 break;
>>>>> 2713
>>>>> 2714 if (cp) {
>>>>> 2715 if (*cp == '\0')
>>>>> 2716 break;
>>>>> 2717 if ((flags & XFF_UNESCAPE) && (*cp == '\\' || *cp == '%')) {
>>>>> 2718 cp += 1;
>>>>> 2719 len -= 1;
>>>>> (gdb) up
>>>>> #1 0x20150908 in xo_format_string (xop=0x2009b120, xbp=0x2009b150, flags=4096, xfp=0xbfbfd280) at /usr/src/contrib/libxo/libxo/libxo.c:2982
>>>>> 2982 cols = xo_format_string_direct(xop, xbp, flags, wcp, cp, len,
>>>>> (gdb) list
>>>>> 2977
>>>>> 2978 return rc;
>>>>> 2979 }
>>>>> 2980 }
>>>>> 2981
>>>>> 2982 cols = xo_format_string_direct(xop, xbp, flags, wcp, cp, len,
>>>>> 2983 xfp->xf_width[XF_WIDTH_MAX],
>>>>> 2984 need_enc, xfp->xf_enc);
>>>>> 2985 if (cols < 0)
>>>>> 2986 goto bail;
>>>>> (gdb) list
>>>>> 3498
>>>>> 3499 xf.xf_enc = (xf.xf_fc == 'm') ? XF_ENC_UTF8
>>>>> 3500 : (xf.xf_lflag || (xf.xf_fc == 'S')) ? XF_ENC_WIDE
>>>>> 3501 : xf.xf_hflag ? XF_ENC_LOCALE : XF_ENC_UTF8;
>>>>> 3502
>>>>> 3503 rc = xo_format_string(xop, xbp, flags, &xf);
>>>>> 3504
>>>>> 3505 if ((flags & XFF_TRIM_WS) && xo_style_is_encoding(xop))
>>>>> 3506 rc = xo_trim_ws(xbp, rc);
>>>>> 3507
>>>>> (gdb) up
>>>>> #3 0x2014c69c in xo_simple_field (xop=0x2009b120, encode_only=0, value=0x0, vlen=0, fmt=0x20130635 "%s", flen=2, flags=<optimized out>) at /usr/src/contrib/libxo/libxo/libxo.c:3817
>>>>> 3817 xo_do_format_field(xop, NULL, fmt, flen, flags);
>>>>> (gdb) list
>>>>> 3812 {
>>>>> 3813 if (encode_only)
>>>>> 3814 flags |= XFF_NO_OUTPUT;
>>>>> 3815
>>>>> 3816 if (vlen == 0)
>>>>> 3817 xo_do_format_field(xop, NULL, fmt, flen, flags);
>>>>> 3818 else if (!encode_only)
>>>>> 3819 xo_data_append_content(xop, value, vlen, flags);
>>>>> 3820 }
>>>>> 3821
>>>>> (gdb) up
>>>>> #4 xo_format_value (xop=<optimized out>, xop@entry=0x2009b120, name=<optimized out>, name@entry=0x204bf931 "state}\n", nlen=<optimized out>, nlen@entry=5, value=0x0, vlen=0, fmt=0x20130635 "%s",
>>>>> flen=2, encoding=0x0, elen=0, flags=<optimized out>) at /usr/src/contrib/libxo/libxo/libxo.c:4373
>>>>> 4373 xo_simple_field(xop, FALSE, value, vlen, fmt, flen, flags);
>>>>> (gdb) list
>>>>> 4368
>>>>> 4369 save.xhs_offset = xbp->xb_curp - xbp->xb_bufp;
>>>>> 4370 save.xhs_columns = xop->xo_columns;
>>>>> 4371 save.xhs_anchor_columns = xop->xo_anchor_columns;
>>>>> 4372
>>>>> 4373 xo_simple_field(xop, FALSE, value, vlen, fmt, flen, flags);
>>>>> 4374
>>>>> 4375 if (flags & XFF_HUMANIZE)
>>>>> 4376 xo_format_humanize(xop, xbp, &save, flags);
>>>>> 4377 break;
>>>>> (gdb) up
>>>>> #5 0x20148710 in xo_do_emit_fields (xop=<optimized out>, xop@entry=0x2009b120, fields=<optimized out>, fields@entry=0xbfbfd7e8, max_fields=max_fields@entry=17, fmt=<optimized out>)
>>>>> at /usr/src/contrib/libxo/libxo/libxo.c:6372
>>>>> 6372 xo_format_value(xop, content, clen, NULL, 0,
>>>>> (gdb) list
>>>>> 6367 flags &= ~XFF_WS; /* Prevent later handling of this flag */
>>>>> 6368 }
>>>>> 6369 }
>>>>> 6370
>>>>> 6371 if (ftype == 'V')
>>>>> 6372 xo_format_value(xop, content, clen, NULL, 0,
>>>>> 6373 xfip->xfi_format, xfip->xfi_flen,
>>>>> 6374 xfip->xfi_encoding, xfip->xfi_elen, flags);
>>>>> 6375 else if (ftype == '[')
>>>>> 6376 xo_anchor_start(xop, xfip, content, clen);
>>>>> (gdb) up
>>>>> #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
>>>>> 6551 return xo_do_emit_fields(xop, fields, max_fields, fmt);
>>>>> (gdb) list
>>>>> 6546 /* Retain the info */
>>>>> 6547 xo_retain_add(fmt, fields, max_fields);
>>>>> 6548 }
>>>>> 6549 }
>>>>> 6550
>>>>> 6551 return xo_do_emit_fields(xop, fields, max_fields, fmt);
>>>>> 6552 }
>>>>> 6553
>>>>> 6554 /*
>>>>> 6555 * Rebuild a format string in a gettext-friendly format. This function
>>>>> (gdb) up
>>>>> #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
>>>>> 6622 rc = xo_do_emit(xop, 0, fmt);
>>>>> (gdb) list
>>>>> 6617 {
>>>>> 6618 xo_handle_t *xop = xo_default(NULL);
>>>>> 6619 ssize_t rc;
>>>>> 6620
>>>>> 6621 va_start(xop->xo_vap, fmt);
>>>>> 6622 rc = xo_do_emit(xop, 0, fmt);
>>>>> 6623 va_end(xop->xo_vap);
>>>>> 6624 bzero(&xop->xo_vap, sizeof(xop->xo_vap));
>>>>> 6625
>>>>> 6626 return rc;
>>>>> (gdb) up
>>>>> #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
>>>>> warning: Source file is more recent than executable.
>>>>> 654 xo_emit("=>{t:start/%*jd} {t:sectors/%*jd} {t:name/%*s} {:scheme} ({h:size/%ld}){t:state}\n",
>>>>> (gdb) list
>>>>> 649 }
>>>>> 650 wname = wmax;
>>>>> 651 pp = LIST_FIRST(&gp->lg_consumer)->lg_provider;
>>>>> 652 secsz = pp->lg_sectorsize;
>>>>> 653 xo_open_instance("part");
>>>>> 654 xo_emit("=>{t:start/%*jd} {t:sectors/%*jd} {t:name/%*s} {:scheme} ({h:size/%ld}){t:state}\n",
>>>>> 655 wblocks, (intmax_t)first, wblocks, (intmax_t)(last - first + 1),
>>>>> 656 wname, gp->lg_name,
>>>>> 657 scheme, pp->lg_mediasize,
>>>>> 658 s ? " [CORRUPT]": "");
>>>>> (gdb) up
>>>>> #9 0x204d1048 in gpart_show (req=0x20089000, fl=<optimized out>) at /usr/src/lib/geom/part/geom_part.c:793
>>>>> 793 gpart_show_geom(gp, element, show_providers);
>>>>> (gdb) list
>>>>> 788 else
>>>>> 789 errx(EXIT_FAILURE, "No such geom: %s.", name);
>>>>> 790 }
>>>>> 791 } else {
>>>>> 792 LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
>>>>> 793 gpart_show_geom(gp, element, show_providers);
>>>>> 794 }
>>>>> 795 }
>>>>> 796 xo_close_list(name);
>>>>> 797 geom_deletetree(&mesh);
>>>>> (gdb) up
>>>>> #10 0x000230dc in run_command (argc=0, argv=<optimized out>) at /usr/src/sbin/geom/core/geom.c:497
>>>>> warning: Source file is more recent than executable.
>>>>> 497 cmd->gc_func(req, flags);
>>>>> (gdb) list
>>>>> 492 buf[0] = '\0';
>>>>> 493 if (cmd->gc_func != NULL) {
>>>>> 494 unsigned flags;
>>>>> 495
>>>>> 496 flags = set_flags(cmd);
>>>>> 497 cmd->gc_func(req, flags);
>>>>> 498 errstr = req->error;
>>>>> 499 } else {
>>>>> 500 gctl_add_param(req, "output", sizeof(buf), buf,
>>>>> 501 GCTL_PARAM_WR | GCTL_PARAM_ASCII);
>>>>> (gdb) up
>>>>> #11 0x00022308 in main (argc=1, argv=0xbfbfed90) at /usr/src/sbin/geom/core/geom.c:861
>>>>> 861 run_command(argc, argv);
>>>>> (gdb) list
>>>>> 856 show_tree();
>>>>> 857 return (0);
>>>>> 858 }
>>>>> 859
>>>>> 860 get_class(&argc, &argv);
>>>>> 861 run_command(argc, argv);
>>>>> 862 /* NOTREACHED */
>>>>> 863
>>>>> 864 exit(EXIT_FAILURE);
>>>>> 865 }
>>>>>
>>>>>
>>>>> For reference:
>>>>>
>>>>> # ls -lodT /usr/src/contrib/libxo/libxo/libxo.c /usr/src/lib/geom/part/geom_part.c /usr/src/sbin/geom/core/geom.c /sbin/gpart
>>>>> -r-xr-xr-x 17 root wheel - 30720 Dec 18 07:22:59 2025 /sbin/gpart
>>>>> -rw-r--r-- 1 root wheel - 211505 Dec 24 08:29:29 2025 /usr/src/contrib/libxo/libxo/libxo.c
>>>>> -rw-r--r-- 1 root wheel - 35380 Dec 24 08:29:29 2025 /usr/src/lib/geom/part/geom_part.c
>>>>> -rw-r--r-- 1 root wheel - 36298 Dec 24 08:29:29 2025 /usr/src/sbin/geom/core/geom.c
>>>>>
>>>>> That explains the "warning: Source file is more recent than executable"
>>>>> messages.
>>>>
>>>> Additional context notes:
>>>>
>>>> ) On the Cortex-A7 SUT the above is repeatable at the
>>>> shell prompt when logged in: just try "gpart show",
>>>> including via gdb use. "/rescue/gpart show" also
>>>> core dumps.
>>>>
>>>> ) In a armv7 chroot on a aarch64 system (the Windows
>>>> Dev Kit 2023), the "gpart show" works just fine.
>>>>
>>>> But the vintages could well be a little different.
>>>> (Tracing to git commits for pkgbase is problematical.)
>>>>
>>>>
>>>> I'll note:
>>>>
>>>> Johan Söllvander <js_at_FreeBSD.org>
>>>> Date: Thu, 18 Dec 2025 15:23:29 UTC
>>>> The branch main has been updated by js:
>>>>
>>>> URL: https://cgit.FreeBSD.org/src/commit/?id=4f809ffec69cd6ede3e7be9a5bc876b2e5931028
>>>>
>>>> commit 4f809ffec69cd6ede3e7be9a5bc876b2e5931028
>>>> Author: Johan Söllvander <js@FreeBSD.org>
>>>> AuthorDate: 2025-12-18 15:06:09 +0000
>>>> Commit: Johan Söllvander <js@FreeBSD.org>
>>>> CommitDate: 2025-12-18 15:22:59 +0000
>>>>
>>>> gpart: add libxo support for "show" subcommand + man page updates
>>>>
>>>> Added libxo support to `gpart show`, also updated the man
>>>> pages for geom and gpart to show where you can expect
>>>> libxo formatted output.
>>>>
>>>> PR: 290629
>>>> MFC after: 1 week
>>>> Sponsored by: ConnectWise
>>>> Reviewed by: asomers, mckusick, phil
>>>> Approved by: asomers (mentor)
>>>> Differential Revision: https://reviews.freebsd.org/D53950
>>>> ---
>>>> . . .
>>>>
>>>>
>>>> Note: Dec 18 07:22:59 2025 /sbin/gpart for my time zone
>>>> would be 2025-12-18 15:22:59 +0000 (the CommitDate) UTC.
>>>
>>>
>>> I shut down the OPi+2e and mounted the boot media
>>> on the Windows Dev Kit 2023 and then did a chroot
>>> into that boot media and tried "gpart show":
>>>
>>> "gpart show" worked just fine.
>>>
>>> What matters is which kernel it runs on for the
>>> exact same world files on the exact same media.
>>>
>>
>> I got that wrong: a large part of the output occurs before
>> a segmentation fault on the Windows Dev Kit 2023. But it has a
>> very different backtrace. Also, note all the "517M" that make no
>> sense --and the "0" and "2" junk as well:
>>
>> # 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)
>>
>> => 40 1953525088 da1 GPT (0)(null)
>> 40 532480 1 efi (517M)
>> 532520 2008 - free - (0)
>> 534528 3563520 2 freebsd-swap (517M)
>> 4098048 6504448 - free - (0)
>> 10602496 1740636160 4 freebsd-ufs (517M)
>> 1751238656 7546880 3 freebsd-swap (517M)
>> 1758785536 194739592 - free - (0)
>>
>> Segmentation fault (core dumped)
>>
>> As for gdb's backtrace:
>>
>> Program terminated with signal SIGSEGV, Segmentation fault.
>> Address not mapped to object.
>> #0 0x200c5ef0 in delete_config (gp=0x2053e224) at /usr/src/lib/libgeom/geom_xml2tree.c:502
>>
>> warning: Source file is more recent than executable.
>> 502 LIST_REMOVE(cf, lg_config);
>> (gdb) bt
>> #0 0x200c5ef0 in delete_config (gp=0x2053e224) at /usr/src/lib/libgeom/geom_xml2tree.c:502
>> #1 geom_deletetree (gmp=gmp@entry=0xffffcb48) at /usr/src/lib/libgeom/geom_xml2tree.c:524
>> #2 0x204d2064 in gpart_show (req=<optimized out>, fl=<optimized out>) at /usr/src/lib/geom/part/geom_part.c:797
>> #3 0x000230dc in run_command (argc=0, argv=<optimized out>) at /usr/src/sbin/geom/core/geom.c:497
>> #4 0x00022308 in main (argc=1, argv=0xffffdc70) at /usr/src/sbin/geom/core/geom.c:861
>>
>>
>> (I need to get some sleep.)
>
> Back to the Cortex-A7 context (armv7 without aatch64)
> for that same media . . .
>
> The tail of a truss output from a run looks like
> (note the "minherit(0x2051e000,1100,INHERIT_ZERO)"?):
>
> . . .
> modfind("g_part") = 190 (0xbe)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 537432064 (0x20089000)
> mmap(0x0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 537452544 (0x2008e000)
> mmap(0x0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 537456640 (0x2008f000)
> mmap(0x0,12288,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542076928 (0x204f7000)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542089216 (0x204fa000)
> mmap(0x0,12288,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542109696 (0x204ff000)
> mmap(0x0,28672,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542121984 (0x20502000)
> __sysctl("sysctl.name2oid kern.geom.confxml",2,0xbfbfdbb8,0xbfbfdbb0,0x200b4716,17) = 0 (0x0)
> __sysctl("kern.geom.confxml",3,0x0,0xbfbfdbb4,0x0,0) = 0 (0x0)
> mmap(0x0,24576,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542150656 (0x20509000)
> __sysctl("kern.geom.confxml",3,0x20509180,0xbfbfdbb4,0x0,0) = 0 (0x0)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542175232 (0x2050f000)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542195712 (0x20514000)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542216192 (0x20519000)
> mmap(0x0,1100,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 542236672 (0x2051e000)
> minherit(0x2051e000,1100,INHERIT_ZERO) = 0 (0x0)
> getrandom("\M-,\M-;\M^P\^Rl\^VHP\M->'\M-v"...,40,0) = 40 (0x28)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542240768 (0x2051f000)
> mmap(0x0,28672,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542261248 (0x20524000)
> mmap(0x0,12288,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542289920 (0x2052b000)
> mmap(0x0,20480,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542302208 (0x2052e000)
> mmap(0x0,12288,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542322688 (0x20533000)
> mmap(0x0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542334976 (0x20536000)
> mmap(0x0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542339072 (0x20537000)
> mmap(0x0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_ALIGNED(12),-1,0x0) = 542343168 (0x20538000)
> SIGNAL 11 (SIGSEGV) code=SEGV_MAPERR trapno=5 addr=0x6e480000
> process killed, signal = 11 (core dumped)
>
>
> Given recent work on anonymous zeroed pages, I note for
> minherit:
>
> QUOTE
> INHERIT_ZERO This option causes the address space in question to be
> mapped as new anonymous pages, which would be initial-
> ized to all zero bytes, in the child process.
> END QUOTE
>
> Not that I've any specific evidence of it being an issue.
>
> I'll note that trying the official debug kernel did not report
> anything special and got the same behavior.
>
>
> ===
> Mark Millard
> marklmi at yahoo.com
>