FS#43625 - [systemd] segfaults since 218

Attached to Project: Arch Linux
Opened by Geert Hendrickx (ghen) - Thursday, 29 January 2015, 13:10 GMT
Last edited by Dave Reisner (falconindy) - Sunday, 15 February 2015, 16:46 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To Thomas Bächler (brain0)
Dave Reisner (falconindy)
Tom Gundersen (tomegun)
Architecture All
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Various systemd tools segfault since update to systemd 218-1

- "systemctl" (no arguments) segfaults ("systemctl status" works though)
- ssh+console login is impossible due to systemd-logind segfault
- kernel prints "invalid opcode: 0000 [#91] SMP"

rollback to systemd 217-8 fixed the problem.

This is on an i686 VPS. All packages are up to date, the problem started since systemd upgrade + reboot, and fixed since systemd downgrade + manual systemd-logind restart.
This task depends upon

Closed by  Dave Reisner (falconindy)
Sunday, 15 February 2015, 16:46 GMT
Reason for closing:  Won't fix
Additional comments about closing:  Specific to a VPS provided kernel.
Comment by Dave Reisner (falconindy) - Thursday, 29 January 2015, 13:30 GMT
Please install debug symbols and provide proper backtraces of the crashes. I provide symbols in a separate repo:

[falconindy]
Server = http://repo.falconindy.com/$repo/os/$arch
Comment by Geert Hendrickx (ghen) - Thursday, 29 January 2015, 13:57 GMT
It seems none of the systemd binaries wants to core dump, despite ulimit -c unlimited? (other processes sent SIGSEGV do dump core)
Comment by Dave Reisner (falconindy) - Thursday, 29 January 2015, 14:02 GMT
You don't need a coredump, just a backtrace.

$ gdb systemctl
set height 0
run
bt full
Comment by Geert Hendrickx (ghen) - Thursday, 29 January 2015, 14:10 GMT
Tried that too: no stack.

(gdb) set height 0
(gdb) run
Starting program: /usr/bin/systemctl
warning: Could not load shared library symbols for linux-gate.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb) bt full
No stack.
(gdb)
Comment by Geert Hendrickx (ghen) - Thursday, 29 January 2015, 14:21 GMT
Btw, even with the bad systemd-logind, when attaching strace to sshd, I can login succesfully (but with a long delay).
Comment by Geert Hendrickx (ghen) - Thursday, 29 January 2015, 16:06 GMT
The problem does not show with more recent kernel 3.16 provided by VPS hoster (previously 3.13).
Comment by Dave Reisner (falconindy) - Thursday, 29 January 2015, 18:47 GMT
Then the problem is with your VPS host, not with Arch's systemd package.
Comment by Geert Hendrickx (ghen) - Sunday, 01 February 2015, 08:08 GMT
Do you want to investigate this further (as it coincides with systemd 218 upgrade), otherwise I just proceed with newer kernel and close this ticket?

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