Comment 0 for bug 1700010

After upgrading to 4.4.0-81-generic some a third party service failed to start after investigating I managed to reproduce the issue using the following method. Note: Issue does not occur after down grading the kernel to 4.4.0-79-generic, but as this report suggests, it is still there in 4.4.0-82-generic

Created a Java file Run.java

import java.util.Date;
import org.apache.commons.daemon.Daemon;
import org.apache.commons.daemon.DaemonContext;
import org.apache.commons.daemon.DaemonInitException;

public class Run implements Daemon {

    private class Runner extends Thread {
        public void run() {
            synchronized(this) {
                try {
                    System.out.println(new Date() + " running ...");
                    wait();
                } catch (Exception e) {}
            }
        }
    }

    Runner r = new Runner();

    @Override
    public void init(DaemonContext context) throws DaemonInitException, Exception {}

    @Override
    public void start() throws Exception {
        System.out.println(new Date() + " Staring...");
        r.start();
    }

    @Override
    public void stop() throws Exception {
        synchronized(r) {
            System.out.println(new Date() + " Stopping ...");
            r.notify();
        }
    }

    @Override
    public void destroy() {}
}

Compiled with

javac -cp /usr/share/java/commons-daemon-1.0.15.jar Run.java

Created a script to launch through JSVC

# Setup variables
EXEC=/usr/bin/jsvc
JAVA_HOME=/usr/lib/jvm/default-java
CLASS_PATH="/usr/share/java/commons-daemon.jar":"/home/nervecentreadm/JavaTest/"
CLASS=Run
USER=nervecentreadm
PID=/tmp/example.pid
LOG_OUT=/tmp/example.out
LOG_ERR=/tmp/example.err

do_exec()
{
    $EXEC -home "$JAVA_HOME" -cp $CLASS_PATH -user $USER -outfile $LOG_OUT -errfile $LOG_ERR -pidfile $PID $1 $CLASS
}

case "$1" in
    start)
        do_exec
            ;;
    stop)
        do_exec "-stop"
            ;;
    restart)
        if [ -f "$PID" ]; then
            do_exec "-stop"
            do_exec
        else
            echo "service not running, will do nothing"
            exit 1
        fi
            ;;
    *)
            echo "usage: daemon {start|stop|restart}" >&2
            exit 3
            ;;
esac

Ran the script with

./service start

The error log file in /tmp/example.err contains.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: jsvc 1.0.15-6
ProcVersionSignature: Ubuntu 4.4.0-82.105-generic 4.4.70
Uname: Linux 4.4.0-82-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.7
Architecture: amd64
Date: Fri Jun 23 08:39:45 2017
ExecutablePath: /usr/bin/jsvc
InstallationDate: Installed on 2014-10-09 (987 days ago)
InstallationMedia: Ubuntu-Server 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
ProcCmdline: jsvc.exec -home /usr/lib/jvm/default-java -cp /usr/share/java/commons-daemon.jar:/home/username/JavaTest/ -user username -outfile /tmp/example.out -errfile /tmp/example.err -pidfile /tmp/example.pid Run
SegvAnalysis:
 Segfault happened at: 0x7f0c51ab0a4f <_expand_stack_to(address)+79>: movb $0x0,(%rax)
 PC (0x7f0c51ab0a4f) ok
 source "$0x0" ok
 destination "(%rax)" (0x7fff5de07ff0) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: commons-daemon
StacktraceTop:
 _expand_stack_to(address) (bottom=0x7fff5de07fff "", bottom@entry=0x7fff5de076b0 "") at /build/openjdk-8-VTMhfL/openjdk-8-8u131-b11/src/hotspot/src/os/linux/vm/os_linux.cpp:673
 os::Linux::manually_expand_stack(JavaThread*, unsigned char*) (t=t@entry=0xa7e000, addr=0x7fff5de076b0 "") at /build/openjdk-8-VTMhfL/openjdk-8-8u131-b11/src/hotspot/src/os/linux/vm/os_linux.cpp:686
 JVM_handle_linux_signal(int, siginfo_t*, void*, int) (sig=sig@entry=11, info=info@entry=0x7fff5de0c230, ucVoid=ucVoid@entry=0x7fff5de0c100, abort_if_unrecognized=abort_if_unrecognized@entry=1) at /build/openjdk-8-VTMhfL/openjdk-8-8u131-b11/src/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp:330
 signalHandler(int, siginfo_t*, void*) (sig=11, info=0x7fff5de0c230, uc=0x7fff5de0c100) at /build/openjdk-8-VTMhfL/openjdk-8-8u131-b11/src/hotspot/src/os/linux/vm/os_linux.cpp:4346
 <signal handler called> () at /lib/x86_64-linux-gnu/libpthread.so.0
Title: jsvc crashed with SIGSEGV in _expand_stack_to()
UpgradeStatus: Upgraded to xenial on 2016-11-01 (233 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo