bad-altstack in ubuntu_stress_smoke_tests failed on AWS ARM64 with X-4.15

[Po-Hsu Lin]

Issue found with 4.15 AWS kernel on X with ARM64 node (amd64 nodes are good)

07:51:49 DEBUG| [stdout] bad-altstack STARTING
07:51:50 DEBUG| [stdout] bad-altstack RETURNED 2
07:51:50 DEBUG| [stdout] bad-altstack FAILED
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] 2 processors online, 2 processors configured
07:51:51 DEBUG| [stdout] stress-ng: info: [15194] dispatching hogs: 4 bad-altstack
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] cache allocate: reducing cache level from L3 (too high) to L2
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] cache allocate: default cache size: 2048K
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] starting stressors
07:51:51 DEBUG| [stdout] stress-ng: debug: [15195] stress-ng-bad-altstack: started [15195] (instance 0)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] 4 stressors spawned
07:51:51 DEBUG| [stdout] stress-ng: debug: [15197] stress-ng-bad-altstack: started [15197] (instance 2)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15196] stress-ng-bad-altstack: started [15196] (instance 1)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15198] stress-ng-bad-altstack: started [15198] (instance 3)
07:51:51 DEBUG| [stdout] stress-ng: ../sysdeps/nptl/fork.c:156: __libc_fork: Assertion `THREAD_GETMEM (self, tid) != ppid' failed.
07:51:51 DEBUG| [stdout] stress-ng: debug: [15196] stress-ng-bad-altstack: exited [15196] (instance 1)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15195] stress-ng-bad-altstack: exited [15195] (instance 0)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] process [15195] terminated
07:51:51 DEBUG| [stdout] stress-ng: error: [15194] process 15196 (stress-ng-bad-altstack) terminated with an error, exit status=5 (killed by signal)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] process [15196] terminated
07:51:51 DEBUG| [stdout] stress-ng: ../sysdeps/nptl/fork.c:156: __libc_fork: Assertion `THREAD_GETMEM (self, tid) != ppid' failed.
07:51:51 DEBUG| [stdout] stress-ng: debug: [15198] stress-ng-bad-altstack: exited [15198] (instance 3)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15197] stress-ng-bad-altstack: exited [15197] (instance 2)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] process [15197] terminated
07:51:51 DEBUG| [stdout] stress-ng: error: [15194] process 15198 (stress-ng-bad-altstack) terminated with an error, exit status=5 (killed by signal)
07:51:51 DEBUG| [stdout] stress-ng: debug: [15194] process [15198] terminated
07:51:51 DEBUG| [stdout] stress-ng: info: [15194] unsuccessful run completed in 1.36s
07:51:51 DEBUG| [stdout]

May 29 07:51:49 ip-172-31-14-254 stress-ng: info: [15194] dispatching hogs: 4 bad-altstack
May 29 07:51:49 ip-172-31-14-254 stress-ng: error: [15194] process 15196 (stress-ng-bad-altstack) terminated with an error, exit status=5 (killed by signal)
May 29 07:51:49 ip-172-31-14-254 AutotestCrashHandler: Application stress-ng-bad-a, PID 15199 crashed
May 29 07:51:49 ip-172-31-14-254 AutotestCrashHandler: Writing core files to ['/home/ubuntu/autotest/client/results/default/ubuntu_stress_smoke_test.stress-smoke-test/debug/crash.stress-ng-bad-a.15199']
May 29 07:51:49 ip-172-31-14-254 AutotestCrashHandler: Application stress-ng-bad-a, PID 15204 crashed
May 29 07:51:49 ip-172-31-14-254 AutotestCrashHandler: Writing core files to ['/home/ubuntu/autotest/client/results/default/ubuntu_stress_smoke_test.stress-smoke-test/debug/crash.stress-ng-bad-a.15204']

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.15.0-1032-aws 4.15.0-1032.34~16.04.1
ProcVersionSignature: User Name 4.15.0-1032.34~16.04.1-aws 4.15.18
Uname: Linux 4.15.0-1032-aws aarch64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: arm64
Date: Wed May 29 08:00:25 2019
Ec2AMI: ami-0ddba1929e996e2dc
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-west-2c
Ec2InstanceType: a1.large
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
SourcePackage: linux-aws-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Colin Ian King (colin-king)]

Fix committed: https://kernel.ubuntu.com/git/cking/stress-ng.git/commit/?id=dcd242164cbf6402154813d2fd148f6a73bda2a7

[Po-Hsu Lin (cypressyew)]

Verified with all 3 AWS ARM64 nodes with 4.15 AWS kernel on X, test passed.
Thanks!