msgstress03 in ubuntu_ltp_syscalls failed on B-AWS-4.15

Issue found on Bionic AWS 4.15.0-1118.125 with the following instance:
  * a1.medium
  * t3.medium

This issue can be found with Bionic AWS 4.15.0-1116.123 as well, thus it's not a regression.

Test log:
INFO: Test start time: Wed Dec 22 08:59:02 UTC 2021
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 8148 -n 8148 -f /tmp/ltp-JhTeCNwSay/alltests -l /dev/null -C /dev/null -T /dev/null
LOG File: /dev/null
FAILED COMMAND File: /dev/null
TCONF COMMAND File: /dev/null
Running tests.......
msgstress03 0 TINFO : Cannot read session user limits from '/sys/fs/cgroup/user.slice/user-1000.slice/pids.max'
msgstress03 0 TINFO : Found limit of processes 4818 (from /sys/fs/cgroup/pids/user.slice/user-1000.slice/pids.max)
msgstress03 0 TINFO : Requested number of processes higher than limit (10000 > 4581), setting to 4581
Fork failed (may be OK if under stress)
msgstress03 1 TFAIL : msgstress03.c:165: Fork failed (may be OK if under stress)
msgrcv() error in child 4347, read # = 9699: Invalid argument
msgrcv() error in child 4348, read # = 9739: Invalid argument
msgrcv() error in child 4350, read # = 9715: Invalid argument
msgrcv() error in child 4345, read # = 9924: Invalid argument
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17336).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17325).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17323).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17321).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17319).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17316).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17314).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17312).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17310).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17308).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17306).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
...
...
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgsnd() error in child 4424, write # = 10000, key = 5fb9c233: Interrupted system call
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17044).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgsnd() error in child 4443, write # = 10000, key = 19a3b4d: Interrupted system call
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17063).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgsnd() error in child 4428, write # = 10000, key = 5bf27232: Interrupted system call
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17048).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
msgsnd() error in child 4467, write # = 10000, key = 2914be4d: Interrupted system call
msgstress03 1 TBROK : tst_sig.c:234: unexpected signal SIGINT(2) received (pid = 17087).
msgstress03 2 TBROK : tst_sig.c:234: Remaining cases broken
msgstress03 0 TWARN : tst_tmpdir.c:343: tst_rmdir: rmobj(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed: unlink(/tmp/ltp-JhTeCNwSay/msgp4tQLw) failed; errno=2: ENOENT
INFO: ltp-pan reported some tests FAIL
LTP Version: 20210927
INFO: Test end time: Wed Dec 22 09:01:22 UTC 2021