[Bug 272965] 14.0-ALPHA1 too: armv7 'Alignment Fault' on read panic during udp_input for kyua's sys/netinet6/exthdr:exthdr ; other udp_input related panics

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 20 Feb 2024 19:23:27 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272965

--- Comment #13 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Warner Losh from comment #8)

armv7 infrastructure has problems with handling core dumps. This
was on an Orange Pi+ 2e:

# uname -apKU
FreeBSD armv7-main-pkgs 15.0-CURRENT FreeBSD 15.0-CURRENT
main-n267775-6ec8bf9f3d17 GENERIC-NODEBUG arm armv7 1500012 1500012

which is from pkgbase. I tested that the panic still happens and
dumped a core out.

armv7-main-pkgs dumped core - see /var/crash/vmcore.0

Tue Feb 20 18:36:46 UTC 2024

FreeBSD armv7-main-pkgs 15.0-CURRENT FreeBSD 15.0-CURRENT
main-n267775-6ec8bf9f3d17 GENERIC-NODEBUG  arm

panic: Fatal abort

Reading symbols from /boot/kernel.GENERIC-NODEBUG/kernel...
Reading symbols from
/usr/lib/debug//boot/kernel.GENERIC-NODEBUG/kernel.debug...
/wrkdirs/usr/ports/devel/gdb/work-py39/gdb-14.1/gdb/thread.c:1362:
internal-error: switch_to_thread: Assertion `thr != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
----- Backtrace -----
0xce8f93 ???
0x11dbd7b ???
---------------------
/wrkdirs/usr/ports/devel/gdb/work-py39/gdb-14.1/gdb/thread.c:1362:
internal-error: switch_to_thread: Assertion `thr != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.


It has been a while since pkgbase updated for armv7. May be there are
build failures. As yet there is no published way to monitor the build
status or completions: all I can monitor is what is published.

What pkgbase published still has /boot/dtb/ files bound with the kernel.
So kernels conflict: at most one kernel at a time as far as pkgbase is
concerned. (And not stable about  what it picks by default.)

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