Pi3B+ illegal instruction in python3 STUR

Marco Moock

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Feb 7, 2024, 9:05:52 AM2/7/24

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Hello!

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253

Can people here confirm that problem with their Pi and Debian 12?
3.11.2-1+b1
Python3 is completely broken on that machine.

--
kind regards
Marco

Spam und Werbung bitte an ichwillges...@nirvana.admins.ws

Andy Burns

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Feb 7, 2024, 10:00:48 AM2/7/24

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Marco Moock wrote:

> Can people here confirm that problem with their Pi and Debian 12?
> 3.11.2-1+b1
> Python3 is completely broken on that machine.

Mine isn't a 3B+ so the following may be of no use ...

andy@raspberrypi:~ $ dmesg | grep -i machine
[ 0.000000] Machine model: Raspberry Pi 3 Model B Rev 1.2

andy@raspberrypi:~ $ uname -a
Linux raspberrypi 5.15.61-v8+ #1579 SMP PREEMPT Fri Aug 26 11:16:44 BST
2022 aarch64 GNU/Linux

andy@raspberrypi:~ $ python3 -V
Python 3.9.2

druck

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Feb 7, 2024, 4:11:11 PM2/7/24

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On 07/02/2024 14:05, Marco Moock wrote:
> Hello!
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253
>
> Can people here confirm that problem with their Pi and Debian 12?
> 3.11.2-1+b1
> Python3 is completely broken on that machine.
>

Are you running just the 64 bit kernel or the 64 bit userland too?
If it's the latter I don't recommend that with only 1GB of memory.

I'm only running full 64 bit Bookworm on Pi 4s and 5s, and there are no
Python issues on those.

---druck

Richard Kettlewell

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Feb 8, 2024, 6:44:50 AM2/8/24

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Marco Moock <mm+use...@dorfdsl.de> writes:
> Hello!
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253
>
> Can people here confirm that problem with their Pi and Debian 12?
> 3.11.2-1+b1
> Python3 is completely broken on that machine.

“It works on my computer”

richard@chulka:~ $ cat /proc/cpuinfo
[...]
Revision : a02082
Serial : 0000000068bf39e8
Model : Raspberry Pi 3 Model B Rev 1.2

richard@chulka:~ $ uname -a
Linux chulka 6.1.0-rpi8-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.73-1+rpt1 (2024-01-25) aarch64 GNU/Linux

richard@chulka:~ $ dpkg -l linux-image-* python3-minimal libpython3.11 libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=============================-===================-============-===============================================================
ii libc6:arm64 2.36-9+rpt2+deb12u4 arm64 GNU C Library: Shared libraries
ii libpython3.11:arm64 3.11.2-6 arm64 Shared Python runtime library (version 3.11)
ii linux-image-6.1.0-rpi7-rpi-v8 1:6.1.63-1+rpt1 arm64 Linux 6.1 for Raspberry Pi v8, Raspberry Pi
ii linux-image-6.1.0-rpi8-rpi-v8 1:6.1.73-1+rpt1 arm64 Linux 6.1 for Raspberry Pi v8, Raspberry Pi
ii linux-image-rpi-v8 1:6.1.73-1+rpt1 arm64 Linux for Raspberry Pi v8 (meta-package)
ii python3-minimal 3.11.2-1+b1 arm64 minimal subset of the Python language (default python3 version)

richard@chulka:~ $ file -L /usr/bin/python3
/usr/bin/python3: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, BuildID[sha1]=15a1b7b17a3e246ca60bac3646ced99af27ca711, for GNU/Linux 3.7.0, stripped

richard@chulka:~ $ sha256sum /usr/bin/python3
37e79c476a2b3feb191fb4af8012363bbde2461fce10418a569bed0765f86e95 /usr/bin/python3

richard@chulka:~ $ python3
Python 3.11.2 (main, Mar 13 2023, 12:18:29) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

However there is an inconsistency with the material in the bug report.
Stefano quotes a STUR insn but if I disassemble it I get LDP at that
location:

richard@chulka:~ $ gdb /usr/bin/python3 junk/python3_core_dump.34704
[..]
Reading symbols from /usr/bin/python3...
Reading symbols from /usr/lib/debug/.build-id/15/a1b7b17a3e246ca60bac3646ced99af27ca711.debug...
[New LWP 34704]

warning: Build-id of /lib/aarch64-linux-gnu/libm.so.6 does not match core file.

warning: Build-id of /lib/aarch64-linux-gnu/libc.so.6 does not match core file.

warning: Build-id of /lib/ld-linux-aarch64.so.1 does not match core file.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
Core was generated by `python3'.
Program terminated with signal SIGILL, Illegal instruction.
#0 0x0000000000510d48 in _PyObject_GC_UNTRACK (op=<optimized out>) at ../Include/internal/pycore_object.h:169
169 ../Include/internal/pycore_object.h: No such file or directory.
(gdb) disassemble 0x0000000000510d48
Dump of assembler code for function gen_dealloc:
0x0000000000510d40 <+0>: stp x29, x30, [sp, #-96]!
0x0000000000510d44 <+4>: mov x29, sp
=> 0x0000000000510d48 <+8>: ldp x3, x2, [x0, #-16]
0x0000000000510d4c <+12>: stp x19, x20, [sp, #16]

This could reflect the libc-level differences, but gen_dealloc is part
of the Python implementation, not the C library.

--
https://www.greenend.org.uk/rjk/

Marco Moock

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Feb 8, 2024, 2:30:11 PM2/8/24

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On 07.02.2024 um 21:11 Uhr druck wrote:

> On 07/02/2024 14:05, Marco Moock wrote:
> > Hello!
> >
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253
> >
> > Can people here confirm that problem with their Pi and Debian 12?
> > 3.11.2-1+b1
> > Python3 is completely broken on that machine.
> >
> Are you running just the 64 bit kernel or the 64 bit userland too?
> If it's the latter I don't recommend that with only 1GB of memory.

All the packages are arm64.

I am aware that they need more RAM, but does that create such errors?

--
kind regards
Marco

Send spam to muel...@cartoonies.org

druck

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Feb 8, 2024, 4:24:45 PM2/8/24

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On 08/02/2024 19:30, Marco Moock wrote:
> On 07.02.2024 um 21:11 Uhr druck wrote:
>
>> On 07/02/2024 14:05, Marco Moock wrote:
>>> Hello!
>>>
>>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253
>>>
>>> Can people here confirm that problem with their Pi and Debian 12?
>>> 3.11.2-1+b1
>>> Python3 is completely broken on that machine.
>>>
>> Are you running just the 64 bit kernel or the 64 bit userland too?
>> If it's the latter I don't recommend that with only 1GB of memory.
>
> All the packages are arm64.
>
> I am aware that they need more RAM, but does that create such errors?

It doesn't, you've got some configuration problem that will probably
only be installed by a reinstall. If you are going down that route I'm
suggesting that for machines which only have 1GB and function worse with
a 64 bit OS and programs, you reinstall a 32 bit OS.

---druck

Robert Riches

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Feb 8, 2024, 11:10:27 PM2/8/24

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On 2024-02-08, Marco Moock <mm+use...@dorfdsl.de> wrote:
> On 07.02.2024 um 21:11 Uhr druck wrote:
>
>> On 07/02/2024 14:05, Marco Moock wrote:
>> > Hello!
>> >
>> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063253
>> >
>> > Can people here confirm that problem with their Pi and Debian 12?
>> > 3.11.2-1+b1
>> > Python3 is completely broken on that machine.
>> >
>> Are you running just the 64 bit kernel or the 64 bit userland too?
>> If it's the latter I don't recommend that with only 1GB of memory.
>
> All the packages are arm64.
>
> I am aware that they need more RAM, but does that create such errors?

Just a wild guess on my part, but in theory if the program in
question called malloc() and neglected to check whether the
result was NULL, lack of RAM could be a contributing factor to a
number of segmentation faults or similar. There might be a
scenario where it could end up in an illegal instruction fault.

--
Robert Riches
spamt...@jacob21819.net
(Yes, that is one of my email addresses.)