[Bug 272966] armv7 Kernel page fault with non-sleepable locks held panic during in6ifa_ifwithaddr for kyua's sys/netpfil/pf/killstate:v6; more tests too

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272966

--- Comment #5 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
For this first round of testing I applied only one patch:

QUOTE
A new one for ipv6 problem in exthdr test:
https://github.com/strejda/tegra/commit/4b51c967a61abc90aad5fd0f3083961e42562664
END QUOTE

With this patch, none of the tests reported here panic.
But all of them fail.

The other "v6" and netinet6 ones that had gotten panics
from my debug build when I was checking the bugzilla
272965 status (that looked like this bugzilla's
panics) also did not panic with the patch. Also: failed.

The one unique panic from my preliminary bugzilla 272965
checking of status under my debug build got its panic in
tcp_input_with_port. That is still true in this test
context:

/usr/bin/kyua test -k /usr/tests/Kyuafile sys/netpfil/pf/get_state:many
sys/netpfil/pf/get_state:many  ->  Fatal kernel mode data abort: 'Alignment
Fault' on read

I'll try adding the other patch and see if I observe any
behavioral changes with both patches in place in the
install.

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