Re: Panic] Alignment Fault in pf_state_insert on rpi 2 (ARM64)

On 1/12/26 08:46, Michał Purzyński wrote:
> Hi everyone,
> 
> I am encountering a consistent kernel panic on boot with my Raspberry Pi
> 2 running FreeBSD 15 release.

It would be good to provide the output from:

# uname -apKU


RPi2B v1.1? v1.2? v1.1 is armv7 (just 32-bit), not arm64/aarch64.

For RPi2B v1.2, there could also be the question of armv7 vs. aarch64
FreeBSD being used:

FreeBSD-15.0-RELEASE-arm-armv7-GENERICSD.img.xz
vs. some equivalent of:
FreeBSD-15.0-RELEASE-arm64-aarch64-RPI.img.xz

> 
> The panic is an "Alignment Fault" that appears to trigger within |
> pf_state_insert| during IPv6 output*.*
> 
> Fatal kernel mode data abort: 'Alignment Fault' on read
> trapframe: 0xdb38b560
> FSR=00000001, FAR=c4cec394, spsr=60000013
> r0 =c4cec394, r1 =c09a48e4, r2 =00000001, r3 =00000000
> r4 =00000000, r5 =dc6eccc0, r6 =c097293c, r7 =dc6f0f80
> r8 =dc6f1000, r9 =dc6ecd80, r10=dc6f0f80, r11=db38b640
> r12=dbd9d3f8, ssp=db38b5f0, slr=dbd3fb70, pc =dbd2e290
> 
> panic: Fatal abort
> cpuid = 2
> time = 1768162360
> KDB: stack backtrace:
> #0 0xc0385dd8 at kdb_backtrace+0x40
> #1 0xc032e230 at vpanic+0x140
> #2 0xc032e0f0 at vpanic+0
> #3 0xc0684194 at abort_align+0
> #4 0xc0684204 at abort_align+0x70
> #5 0xc0683e8c at abort_handler+0x430
> #6 0xc0662814 at exception_exit+0
> #7 0xdbd2e290 at pf_state_insert+0xb90
> #8 0xdbd3fb70 at $a+0x2c8
> #9 0xdbd3d7b8 at $a+0x224
> #10 0xdbd5a04c at $a+0x34
> #11 0xc048b9b4 at pfil_mbuf_out+0x44
> #12 0xc05182c4 at ip6_output+0x1184
> #13 0xc05359a0 at udp6_send+0x85c
> #14 0xc03e430c at sosend_dgram+0x4a8
> #15 0xc03e535c at sousrsend+0x5c
> #16 0xc03ef70c at kern_sendit+0x198
> #17 0xc03efbd8 at sendit+0x330
> Uptime: 38s
> 
> The panic happens +- every time I boot. I also tried unplugging for like
> 30 sec with the same effect. The installation was uneventful: I just
> flashed the recent 15 release image, booted and restored my
> configuration files. LMK what other info I could capture.
> 
> --
> 
> Michał Purzyński
> 
> 

In case the context is actually for an RPi2B v1.1:

FreeBSD networking has lots of problems with meeting the armv7
configuration's alignment requirements. Past bugzilla reports include:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272966
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272965

But those did not involve "pf" code, as I remember.

Note: I'm not subscribed to the pf mail list and so removed the reference.


-- 
===
Mark Millard
marklmi at yahoo.com