[systemd-bugs] [Bug 81327] New: Crash in systemd 210 when ssh is disconnected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81327

          Priority: medium
            Bug ID: 81327
          Assignee: systemd-bugs at lists.freedesktop.org
           Summary: Crash in systemd 210 when ssh is disconnected
        QA Contact: systemd-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: All
          Reporter: umut at tezduyar.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: general
           Product: systemd

We started seeing frequent systemd crashes when ssh connections are closed. We
were able to get a stack trace and the signal number which is SIGSEGV. Stack
trace is telling me some kind of memory problem in systemd.

Systemd version 210.

ssh.service

[Unit]
Description=Per-Connection SSH Daemon
IgnoreOnIsolate=yes
After=sshdgenkeys.service

[Service]
ExecStart=-/usr/sbin/sshd -i
StandardInput=socket
KillMode=process

Stack trace:

#0  0x77f5daf8 in pause () from
target/mipsisa32r2el-axis-linux-gnu/lib/libpthread.so.0
#1  0x0049a480 in freeze () at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/shared/util.c:3440
#2  0x0046fc30 in crash.1636 (sig=<optimized out>) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/main.c:207
#3  <signal handler called>
#4  0x0046ad98 in unit_unwatch_pid (u=0xd44700, pid=21222) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/unit.c:1734
#5  0x004472c4 in invoke_sigchld_event.2765 (m=<optimized out>, u=0xd44700,
si=0x7f9da448) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/manager.c:1429
#6  0x0047265c in manager_dispatch_sigchld.2770 (m=m at entry=0xcbe230) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/manager.c:1477
#7  0x0045990c in manager_dispatch_signal_fd.part.32 (userdata=<optimized out>)
at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/manager.c:1723
#8  manager_dispatch_signal_fd.2718 (source=<optimized out>, fd=<optimized
out>, revents=<optimized out>, userdata=0xcbe230)
   at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/manager.c:1508
#9  0x0046eb04 in source_dispatch (s=0xcbe770) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/libsystemd/sd-event/sd-event.c:1861
#10 0x0046f494 in sd_event_run (e=0xcbe4d8, timeout=<optimized out>) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/libsystemd/sd-event/sd-event.c:2117
#11 0x00407fb4 in manager_loop (m=0xcbe230) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/manager.c:1844
#12 main (argc=1, argv=0x7f9dab74) at
/home/antonn/axis/P3367_new/unpacked/apps/systemd-IR210-2/systemd/src/core/main.c:1704

Please close the bug if this has been fixed in new version of systemds.

Umut

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