python-gi/arm64 segfaults with the focal-proposed libffi version

[Sebastien Bacher]

Testcase, on focal/arm64

$ sudo apt install python3-goocalendar
$ python3 -c "import goocalendar ; print(goocalendar.__version__)"

-> works fine

install the python3-gi package from focal-proposed it segfaults in libffi

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x0000fffff7390ff8 in ffi_call_SYSV () at ../src/aarch64/sysv.S:114
#2 0x0000fffff7390634 in ffi_call_int (cif=0xa12d78, fn=<optimized out>,
    orig_rvalue=<optimized out>, avalue=0x0, closure=<optimized out>)

[Dimitri John Ledkov (xnox)]

Cannot reproduce:

$ uname -a
Linux Mcdivitt-B0-Cartridge37 5.4.0-9-generic #12-Ubuntu SMP Mon Dec 16 22:33:31 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux

$ dpkg -l | grep -e libffi -e python3-gi
ii libffi6:arm64 3.2.1-9 arm64 Foreign Function Interface library runtime
ii libffi7:arm64 3.3-2.3build1 arm64 Foreign Function Interface library runtime
ii python3-gi 3.34.0-3build2 arm64 Python 3 bindings for gobject-introspection libraries
ii python3-gi-cairo 3.34.0-3build2 arm64 Python 3 Cairo bindings for the GObject library
ii python3-github 1.43.7-1 all Access the full Github API v3 from Python3
ii python3-gitlab 1:1.15.0-1 all Python 3 GitLab API client library

$ python3 -c "import goocalendar ; print(goocalendar.__version__)"
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
0.5

python3-gi depends on libffi7

[Matthias Klose (doko)]

works for me as well.

[Dave Jones (waveform)]

Reproduced on a Pi4 running the current focal daily:

ubuntu@ubuntu:~$ python3 -c "import goocalendar; print(goocalendar.__version__)"
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
0.5
ubuntu@ubuntu:~$ sudo apt install -t focal-proposed python3-gi
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libffi7 python3-gi-cairo
The following NEW packages will be installed:
  libffi7
The following packages will be upgraded:
  python3-gi python3-gi-cairo
2 upgraded, 1 newly installed, 0 to remove and 85 not upgraded.
Need to get 220 kB of archives.
After this operation, 60.4 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3-gi-cairo arm64 3.34.0-3build2 [8336 B]
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libffi7 arm64 3.3-2.3build1 [17.1 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3-gi arm64 3.34.0-3build2 [195 kB]
Fetched 220 kB in 2s (114 kB/s)
(Reading database ... 79794 files and directories currently installed.)
Preparing to unpack .../python3-gi-cairo_3.34.0-3build2_arm64.deb ...
Unpacking python3-gi-cairo (3.34.0-3build2) over (3.34.0-3) ...
Selecting previously unselected package libffi7:arm64.
Preparing to unpack .../libffi7_3.3-2.3build1_arm64.deb ...
Unpacking libffi7:arm64 (3.3-2.3build1) ...
Preparing to unpack .../python3-gi_3.34.0-3build2_arm64.deb ...
Unpacking python3-gi (3.34.0-3build2) over (3.34.0-3) ...
Setting up libffi7:arm64 (3.3-2.3build1) ...
Setting up python3-gi (3.34.0-3build2) ...
Setting up python3-gi-cairo (3.34.0-3build2) ...
Processing triggers for libc-bin (2.30-0ubuntu3) ...
ubuntu@ubuntu:~$ python3 -c "import goocalendar; print(goocalendar.__version__)"
Segmentation fault (core dumped)

[Dimitri John Ledkov (xnox)]

On Fri, 17 Jan 2020 at 16:15, Dave Jones <email address hidden> wrote:
>
> Get:1 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3-gi-cairo arm64 3.34.0-3build2 [8336 B]
> Get:2 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libffi7 arm64 3.3-2.3build1 [17.1 kB]
> Get:3 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3-gi arm64 3.34.0-3build2 [195 kB]
> Fetched 220 kB in 2s (114 kB/s)

Do you have the new python3.7 installed from focal-proposed?

note, i was running everything from proposed. Since libffi6 & 7 might
be used by python3.7.

[Dave Jones (waveform)]

> Do you have the new python3.7 installed from focal-proposed?

> note, i was running everything from proposed. Since libffi6 & 7 might
> be used by python3.7.

Ah, no I didn't. However, doesn't seem like it makes much difference:

ubuntu@ubuntu:~$ sudo apt install -t focal-proposed python3.7
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libpython3.7 libpython3.7-dbg libpython3.7-minimal libpython3.7-stdlib python3.7-dbg python3.7-minimal
Suggested packages:
  python3.7-venv python3.7-doc python3-gdbm-dbg python3-tk-dbg binfmt-support
The following packages will be upgraded:
  libpython3.7 libpython3.7-dbg libpython3.7-minimal libpython3.7-stdlib python3.7 python3.7-dbg
  python3.7-minimal
7 upgraded, 0 newly installed, 0 to remove and 72 not upgraded.
Need to get 32.9 MB of archives.
After this operation, 26.6 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7-dbg arm64 3.7.6-1ubuntu2 [15.9 MB]
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7 arm64 3.7.6-1ubuntu2 [304 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7 arm64 3.7.6-1ubuntu2 [1373 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-dbg arm64 3.7.6-1ubuntu2 [11.4 MB]
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-stdlib arm64 3.7.6-1ubuntu2 [1717 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7-minimal arm64 3.7.6-1ubuntu2 [1723 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-minimal arm64 3.7.6-1ubuntu2 [547 kB]
Fetched 32.9 MB in 25s (1316 kB/s)
(Reading database ... 80531 files and directories currently installed.)
Preparing to unpack .../0-python3.7-dbg_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7-dbg (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../1-python3.7_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../2-libpython3.7_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../3-libpython3.7-dbg_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-dbg:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../4-libpython3.7-stdlib_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-stdlib:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../5-python3.7-minimal_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7-minimal (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../6-libpython3.7-minimal_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-minimal:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Setting up libpython3.7-minimal:arm64 (3.7.6-1ubuntu2) ...
Setting up python3.7-minimal (3.7.6-1ubuntu2) ...
Setting up libpython3.7-stdlib:arm64 (3.7.6-1ubuntu2) ...
Setting up libpython3.7:arm64 (3.7.6-1ubuntu2) ...
Setting up libpython3.7-dbg:arm64 (3.7.6-1ubuntu2) ...
Setting up python3.7 (3.7.6-1ubuntu2) ...
Setting up pytho...

[Matthias Klose (doko)]

so this is not completely updated to focal-proposed?

[Dave Jones (waveform)]

> so this is not completely updated to focal-proposed?

No, that was just certain focal-proposed packages on a focal image (on a pi4). Have now re-run with a full focal-proposed chroot (under the same focal image), and that doesn't reproduce the issue:

(focal-arm64)root@ubuntu:~# cat /etc/apt/sources.list
deb http://ports.ubuntu.com/ubuntu-ports focal main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-proposed main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-proposed main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-security main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-security main restricted universe multiverse
(focal-arm64)root@ubuntu:~# dpkg -l | grep -e "libffi" -e "python3"
ii libffi6:arm64 3.2.1-9 arm64 Foreign Function Interface library runtime
ii libffi7:arm64 3.3-3 arm64 Foreign Function Interface library runtime
ii libpython3-stdlib:arm64 3.7.5-1ubuntu1 arm64 interactive high-level object-oriented language (default python3 version)
ii libpython3.7-minimal:arm64 3.7.6-1ubuntu2 arm64 Minimal subset of the Python language (version 3.7)
ii libpython3.7-stdlib:arm64 3.7.6-1ubuntu2 arm64 Interactive high-level object-oriented language (standard library, version 3.7)
ii python3 3.7.5-1ubuntu1 arm64 interactive high-level object-oriented language (default python3 version)
ii python3-cairo:arm64 1.16.2-2ubuntu1 arm64 Python3 bindings for the Cairo vector graphics library
ii python3-gi 3.34.0-3build2 arm64 Python 3 bindings for gobject-introspection libraries
ii python3-gi-cairo 3.34.0-3build2 arm64 Python 3 Cairo bindings for the GObject library
ii python3-goocalendar 0.5-1 all Calendar widget for GTK+ using PyGoocanvas (Python 3)
ii python3-minimal 3.7.5-1ubuntu1 arm64 minimal subset of the Python language (default python3 version)
ii python3-pkg-resources 44.0.0-1 all Package Discovery and Resource Access using pkg_resources
ii python3.7 3.7.6-1ubuntu2 arm64 Interactive high-level object-oriented language (version 3.7)
ii python3.7-minimal 3.7.6-1ubuntu2 arm64 Minimal subset of the Python language (version 3.7)
(focal-arm64)root@ubuntu:~# python3 -c "import goocalendar; print(goocalendar.__version__)"
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
0.5

[Matthias Klose (doko)]

so this apparently needs re-testing with appropriate triggers, or maybe tightened dependencies on some packages.

[Sebastien Bacher (seb128)]

it's fixed in proposed