[Bug 1952542] Re: systemd randomly crashes

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Please execute the following command only once, as it will automatically
gather debugging information, in a terminal:

apport-collect 1952542

When reporting bugs in the future please use apport by using 'ubuntu-
bug' and the name of the package affected. You can learn more about this
functionality at https://wiki.ubuntu.com/ReportingBugs.

ie. this bug report should have been filed with
`ubuntu-bug /var/crash/_usr_lib_systemd_systemd.0.crash`
as an uploaded file added as an attachment is less useful than the fields being populated from details from your machine which is done when apport tools are used.


** Changed in: systemd (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1952542

Title:
  systemd randomly crashes

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  When screensaver is on, I often can't wake the system back up again.
  Screen comes, up, clock shows but frozen and login does nothing.

  I have a file `/var/crash/_usr_lib_systemd_systemd.0.crash` from
  around the incident time, so I guess it's systemd itself that's
  crashing.

  Trying to dig into the crash report, this is how far I get:

  ```
  $ gdb `cat ExecutablePath` CoreDump
  GNU gdb (Ubuntu 11.1-0ubuntu2) 11.1
  Copyright (C) 2021 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 "x86_64-linux-gnu".
  Type "show configuration" for configuration details.
  For bug reporting instructions, please see:
  <https://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/lib/systemd/systemd...
  (No debugging symbols found in /usr/lib/systemd/systemd)
  [New LWP 2241488]
  [New LWP 1]
  [Thread debugging using libthread_db enabled]
  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  Core was generated by `/sbin/init recovery dis_ucode_ldr'.
  Program terminated with signal SIGABRT, Aborted.
  #0  0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
  120	../sysdeps/unix/syscall-template.S: No such file or directory.
  [Current thread is 1 (LWP 2241488)]
  (gdb) bt
  #0  0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
  #1  0x0000561ece72cb5c in ?? ()
  #2  <signal handler called>
  #3  __pthread_kill_implementation (no_tid=0, signo=6, threadid=139637107291648) at pthread_kill.c:44
  #4  __pthread_kill_internal (signo=6, threadid=139637107291648) at pthread_kill.c:80
  #5  __GI___pthread_kill (threadid=139637107291648, signo=signo at entry=6) at pthread_kill.c:91
  #6  0x00007effcc991476 in __GI_raise (sig=sig at entry=6) at ../sysdeps/posix/raise.c:26
  #7  0x00007effcc9777b7 in __GI_abort () at abort.c:79
  #8  0x00007effccced6fe in ?? () from /lib/systemd/libsystemd-shared-248.so
  #9  0x0000561ece7758c4 in ?? ()
  #10 0x0000561ece77a7aa in ?? ()
  #11 0x0000561ece72b8a7 in ?? ()
  #12 0x00007effcc978fd0 in __libc_start_call_main (main=main at entry=0x561ece729330, argc=argc at entry=3, argv=argv at entry=0x7ffc9cbad768) at ../sysdeps/nptl/libc_start_call_main.h:58
  #13 0x00007effcc97907d in __libc_start_main_impl (main=0x561ece729330, argc=3, argv=0x7ffc9cbad768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc9cbad758)
      at ../csu/libc-start.c:409
  #14 0x0000561ece72c6f5 in ?? ()
  (gdb) 
  #0  0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
  #1  0x0000561ece72cb5c in ?? ()
  #2  <signal handler called>
  #3  __pthread_kill_implementation (no_tid=0, signo=6, threadid=139637107291648) at pthread_kill.c:44
  #4  __pthread_kill_internal (signo=6, threadid=139637107291648) at pthread_kill.c:80
  #5  __GI___pthread_kill (threadid=139637107291648, signo=signo at entry=6) at pthread_kill.c:91
  #6  0x00007effcc991476 in __GI_raise (sig=sig at entry=6) at ../sysdeps/posix/raise.c:26
  #7  0x00007effcc9777b7 in __GI_abort () at abort.c:79
  #8  0x00007effccced6fe in ?? () from /lib/systemd/libsystemd-shared-248.so
  #9  0x0000561ece7758c4 in ?? ()
  #10 0x0000561ece77a7aa in ?? ()
  #11 0x0000561ece72b8a7 in ?? ()
  #12 0x00007effcc978fd0 in __libc_start_call_main (main=main at entry=0x561ece729330, argc=argc at entry=3, argv=argv at entry=0x7ffc9cbad768) at ../sysdeps/nptl/libc_start_call_main.h:58
  #13 0x00007effcc97907d in __libc_start_main_impl (main=0x561ece729330, argc=3, argv=0x7ffc9cbad768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc9cbad758)
      at ../csu/libc-start.c:409
  #14 0x0000561ece72c6f5 in ?? ()
  quit) 
  ```

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