msgstress04 test in ubuntu_ltp_syscalls failed with X-KVM

[Po-Hsu Lin]

Test failed with many "message queue mismatch" error message:
    Message queue mismatch in the reader of child group 75 for message queue id 545948306

And

<<<test_start>>>
tag=msgstress04 stime=1539249959
cmdline="msgstress04"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
msgstress04 0 TINFO : Found 31997 available message queues
msgstress04 0 TINFO : Using upto 1986 pids
Message queue mismatch in the reader of child group 37 for message queue id 524910642
Message queue mismatch in the reader of child group 37 for message queue id 524943411
Message queue mismatch in the reader of child group 40 for message queue id 525271101
....
Child exit status = 1 from child group 37
Message queue mismatch in the reader of child group 38 for message queue id 526123096
....
Child exit status = 1 from child group 39
....
Child exit status = 1 from child group 42
msgstress04 1 TFAIL : msgstress04.c:220: Child exit status = 1
Message queue mismatch in the reader of child group 66 for message queue id 543883860
<<<execution_status>>>
initiation_status="ok"
duration=197 termination_type=exited termination_id=1 corefile=no
cutime=575 cstime=1037
<<<test_end>>>

Complete test log: https://pastebin.ubuntu.com/p/YtTXBh2tvP/

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-1036-kvm 4.4.0-1036.42
ProcVersionSignature: User Name 4.4.0-1036.42-kvm 4.4.155
Uname: Linux 4.4.0-1036-kvm x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Thu Oct 11 09:33:08 2018
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)

[Po-Hsu Lin (cypressyew)]

Found on Disco KVM (5.0.0-1020.21 - kvm) as well:
msgstress04 1 TBROK : msgstress04.c:365: Kill failed to kill child 3