Samba crashes when connecting to it with Android app

[Johan van Dijk]

When I connect to Samba with the Android App "Solid Explorer", I can reliably crash Samba.
The same app works without problems when I connect to Samba on Ubuntu 22.10

Samba does not crash when I connect to it from another Ubuntu or Windows machine.

I use a username and password to access Samba.

Also, when I run "ubuntu-bug /var/crash/_usr_sbin_smbd.0.crash" I get an error:
........................................................................................ERROR: hook /usr/share/apport/package-hooks/source_samba.py crashed:
...........Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/report.py", line 228, in _run_hook
    symb['add_info'](report, ui)
...... File "/usr/share/apport/package-hooks/source_samba.py", line 93, in add_info
    ui.information("As a part of the bug reporting process, you'll be asked as series of questions to help provide a more descriptive bug report. Please answer the following questions to the best of your abilities. Afterwards, a browser will be opened to finish filing this as a bug in the Launchpad bug tracking system.")
.AttributeError: 'NoneType' object has no attribute 'information'
...........................................................................................

Other information:

lsb_release -rd
Description: Ubuntu 22.04.2 LTS
Release: 22.04

apt-cache policy samba
samba:
  Installed: 2:4.15.13+dfsg-0ubuntu1.1
  Candidate: 2:4.15.13+dfsg-0ubuntu1.1
  Version table:
 *** 2:4.15.13+dfsg-0ubuntu1.1 500
        500 http://nl.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        500 http://nl.archive.ubuntu.com/ubuntu jammy-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2:4.15.5~dfsg-0ubuntu5 500
        500 http://nl.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: samba 2:4.15.13+dfsg-0ubuntu1.1
ProcVersionSignature: Ubuntu 5.15.0-69.76-generic 5.15.87
Uname: Linux 5.15.0-69-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
CasperMD5CheckResult: pass
Date: Sun Apr 9 05:16:54 2023
InstallationDate: Installed on 2022-06-20 (292 days ago)
InstallationMedia: Ubuntu-Server 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220421)
NmbdLog:

OtherFailedConnect: Yes
SambaServerRegression: Yes
SmbConfIncluded: Yes
SmbLog:

SourcePackage: samba
TestparmExitCode: 0
UpgradeStatus: No upgrade log present (probably fresh install)

[Bryce Harrington (bryce)]

Regarding the apport hook crash, that should rather be its own bug report since it'll need a distinct fix. I've filed that for you as LP: #2016776.

Regarding the crash, I decoded your crash dump manually to get a stack trace. I wasn't able to get the symbols to load even with debuginfod, but maybe this will give some clue anyway:

#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=140407134892032) at ./nptl/pthread_kill.c:44
        tid = <optimized out>
        ret = 0
        pd = 0x7fb315663000
        old_mask = {__val = {140407203554592, 32, 94457834845924, 94457834845824, 94457834845924, 0, 0, 0, 0, 0, 0, 13675241866861084416, 140407134891864, 140722223243408, 140407209314080, 10}}
        ret = <optimized out>
        pd = <optimized out>
        old_mask = <optimized out>
        ret = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
        resultvar = <optimized out>
        resultvar = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
        __futex = <optimized out>
        resultvar = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
        __futex = <optimized out>
        __private = <optimized out>
        __oldval = <optimized out>
        result = <optimized out>
#1 __pthread_kill_internal (signo=6, threadid=140407134892032) at ./nptl/pthread_kill.c:78
No locals.
#2 __GI___pthread_kill (threadid=140407134892032, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
No locals.
#3 0x00007fb3197de476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
        ret = <optimized out>
#4 0x00007fb3197c47f3 in __GI_abort () at ./stdlib/abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0 <repeats 14 times>, 268435456, 0}}, sa_flags = -70385920, sa_restorer = 0x0}
        sigs = {__val = {32, 0, 0, 0, 0, 13675241866861084416, 140407134891864, 140722223243408, 140407209314080, 10, 4, 94455256317952, 140407203554592, 140722223243712, 0, 32}}
#5 0x00007fb319ce13e4 in dump_core () from /lib/x86_64-linux-gnu/libsmbconf.so.0
No symbol table info available.
#6 0x00007fb319cb5b35 in smb_panic_s3 () from /lib/x86_64-linux-gnu/libsmbconf.so.0
No symbol table info available.
#7 0x00007fb31a0dd47e in smb_panic () from /lib/x86_64-linux-gnu/libsamba-util.so.0
No symbol table info available.
#8 0x00007fb31a0dd505 in ?? () from /lib/x86_64-linux-gnu/libsamba-util.so.0
No symbol table info available.
#9 <signal handler called>
No locals.
#10 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74
No locals.
#11 0x00007fb319cc7711 in volume_label () from /lib/x86_64-linux-gnu/libsmbconf.so.0
No symbol table info available.
#12 0x00007fb319ecc703 in smbd_do_qfsinfo () from /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0
No symbol table info available.
#13 0x00007fb319f2f385 in smbd_smb2_request_proce...

[Launchpad Janitor (janitor)]

[Expired for samba (Ubuntu) because there has been no activity for 60 days.]