Two crash files were already uploaded - see above, but manually. I just created another nice(er) 'apport-retrace --gdb' output locally on that system (w/ dbgsym):
$ sudo apport-retrace --gdb --rebuild-package-info /var/crash/_usr_sbin_sshd.0.crash GNU gdb (Ubuntu 8.2.90-0ubuntu1) 8.2.90 Copyright (C) 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "s390x-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word". Reading symbols from /usr/sbin/sshd... Reading symbols from /usr/lib/debug/.build-id/18/2cb9bda0be98e50d87a4104872aead696f1998.debug... [New LWP 4508] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/s390x-linux-gnu/libthread_db.so.1". Core was generated by `/usr/sbin/sshd -T'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __pthread_rwlock_wrlock_full (abstime=0x0, rwlock=0x0) at pthread_rwlock_common.c:581 581 pthread_rwlock_common.c: No such file or directory. (gdb) bt #0 __pthread_rwlock_wrlock_full (abstime=0x0, rwlock=0x0) at pthread_rwlock_common.c:581 #1 __GI___pthread_rwlock_wrlock (rwlock=0x0) at pthread_rwlock_wrlock.c:27 #2 0x000003ffab27238a in CRYPTO_THREAD_write_lock () from /lib/s390x-linux-gnu/libcrypto.so.1.1 #3 0x000003ffab208b32 in ERR_unload_strings () from /lib/s390x-linux-gnu/libcrypto.so.1.1 #4 0x000003ffab6868b4 in ERR_unload_IBMCA_strings () at e_ibmca_err.c:122 #5 0x000003ffab684dd2 in ibmca_destructor () at e_ibmca.c:754 #6 0x000003ffab7100ea in ?? () from /lib/ld64.so.1 #7 0x000003ffaabc79e8 in __run_exit_handlers (status=<optimized out>, listp=0x3ffaad189a8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:108 #8 0x000003ffaabc7ad8 in __GI_exit (status=<optimized out>) at exit.c:139 #9 0x000002aa192909c0 in main (ac=<optimized out>, av=<optimized out>) at ../../sshd.c:2257 (gdb) quit (if you wanna see it colored, see attachment) ** Attachment added: "gbd_session.png" https://bugs.launchpad.net/ubuntu-z-systems/+bug/1819487/+attachment/5246118/+files/gbd_session.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1819487 Title: sshd crashed on s390x with hw crypto enabled Status in Ubuntu on IBM z Systems: Triaged Status in openssh package in Ubuntu: New Bug description: While using today's daily image of disco (either in z/VM or on LPAR) and enabling s309x hardware crypto support in openssh, sshd crashes with the following messages: $ ssh ubuntu@localhost The authenticity of host 'localhost (::1)' can't be established. ECDSA key fingerprint is SHA256:KoTYC0jCQPtmsOMmBW9DrCiBbkrKTL0leQ/zoIaInNw. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts. ubuntu@localhost's password: packet_write_wait: Connection to ::1 port 22: Broken pipe (local session is sufficient to reproduce) Steps to reproduce - on disco daily: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Disco Dingo (development branch) Release: 19.04 Codename: disco $ uname -a Linux zlin42 5.0.0-7-generic #8-Ubuntu SMP Mon Mar 4 16:25:21 UTC 2019 s390x s390x s390x GNU/Linux - enable z hw crypto support for openssh on an Ubuntu host (zlin42) on s390x like this: - sudo apt-get install openssl-ibmca libica-utils libica3 - sudo tee -a /etc/ssl/openssl.cnf < /usr/share/doc/openssl-ibmca/examples/openssl.cnf.sample - sudo sed -i 's/^\(openssl_conf = openssl_def.*$\)/# \1/g' /etc/ssl/openssl.cnf - sudo sed -i '10i openssl_conf = openssl_def' /etc/ssl/openssl.cnf - afterwards ssh login attempts fail (existing session are unaffected): $ ssh ubuntu@localhost The authenticity of host 'localhost (::1)' can't be established. ECDSA key fingerprint is SHA256:KoTYC0jCQPtmsOMmBW9DrCiBbkrKTL0leQ/zoIaInNw. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts. ubuntu@localhost's password: packet_write_wait: Connection to ::1 port 22: Broken pipe [94629.032586] User process fault: interruption code 003b ilc:2 in libpthread-2.29.so[3ff7d480000+1c000] [94629.032597] Failing address: 0000000000000000 TEID: 0000000000000800 [94629.032598] Fault in primary space mode while using user ASCE. [94629.032601] AS:00000007450281c7 R3:0000000000000024 [94629.032606] CPU: 0 PID: 8183 Comm: sshd Not tainted 5.0.0-7-generic #8-Ubuntu [94629.032607] Hardware name: IBM 2964 N63 400 (LPAR) [94629.032608] User PSW : 0705200180000000 000003ff7d48e954 [94629.032610] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 RI:0 EA:3 [94629.032611] User GPRS: 0000000000000000 0000000000000000 0000000000000000 000003ff7e0085c8 [94629.032612] 000003ff7e510108 000003ff7db1c3a8 0000000000000000 000003fff857eea0 [94629.032613] 000003ff7e525040 000002aa3f5ec090 000003ff7e4916f0 000003ff7e4921a8 [94629.032614] 000003ff7db17c18 0000000000000002 000003ff7e07238a 000003fff857ea20 [94629.032622] User Code: 000003ff7d48e946: b9040012 lgr %r1,%r2 000003ff7d48e94a: e3f0ff60ff71 lay %r15,-160(%r15) #000003ff7d48e950: 47000000 bc 0,0 >000003ff7d48e954: 58202018 l %r2,24(%r2) 000003ff7d48e958: b24f00b0 ear %r11,%a0 000003ff7d48e95c: ebbb0020000d sllg %r11,%r11,32 000003ff7d48e962: b24f00b1 ear %r11,%a1 000003ff7d48e966: 5920b0d0 c %r2,208(%r11) [94629.032634] Last Breaking-Event-Address: [94629.032638] [<000003ff7df773b4>] 0x3ff7df773b4 For more details see attachments ... 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