Comment 0 for bug 1744226

This is a potential regression.

The system will hang when running the test_too_early_vsyscall from ubuntu_qrt_kernel_panic test suite with the proposed 3.13.0-140 kernel.

Steps:
1. Deploy a Trusty amd64 node (node pepe in this case)
2. sudo apt-get install git python-minimal -y
3. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests -b master-next
4. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest
5. rm -fr autotest/client/tests
6. ln -sf ~/autotest-client-tests autotest/client/tests
7. Monitor the syslog with tail -f /var/log/syslog
8. AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/ubuntu_qrt_kernel_panic/control

Results:
* The system will hang, no output from syslog. This test can pass with 3.13.0-139

Output with 3.13.0-140
ubuntu@onibi:~$ AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/ubuntu_qrt_kernel_panic/control
06:39:30 INFO | Writing results to /home/ubuntu/autotest/client/results/default
06:39:30 DEBUG| Initializing the state engine
06:39:30 DEBUG| Persistent state client.steps now set to []
06:39:30 DEBUG| Persistent option harness now set to None
06:39:30 DEBUG| Persistent option harness_args now set to None
06:39:30 DEBUG| Selected harness: standalone
06:39:31 INFO | START ---- ---- timestamp=1516343971 localtime=Jan 19 06:39:31
06:39:31 DEBUG| Persistent state client._record_indent now set to 1
06:39:31 INFO | START ubuntu_qrt_kernel_panic.setup ubuntu_qrt_kernel_panic.setup timestamp=1516343971 localtime=Jan 19 06:39:31
06:39:31 DEBUG| Persistent state client._record_indent now set to 2
06:39:31 DEBUG| Persistent state client.unexpected_reboot now set to ('ubuntu_qrt_kernel_panic.setup', 'ubuntu_qrt_kernel_panic.setup')
06:39:31 DEBUG| Running 'apt-get install --yes --force-yes git build-essential libcap2-bin gawk execstack exim4 libcap-dev libkeyutils-dev gcc-multilib'
06:39:31 DEBUG| [stdout] Reading package lists...
06:39:33 DEBUG| [stdout] Building dependency tree...
06:39:33 DEBUG| [stdout] Reading state information...
06:39:33 DEBUG| [stdout] build-essential is already the newest version.
06:39:33 DEBUG| [stdout] execstack is already the newest version.
06:39:33 DEBUG| [stdout] gawk is already the newest version.
06:39:33 DEBUG| [stdout] gcc-multilib is already the newest version.
06:39:33 DEBUG| [stdout] libcap-dev is already the newest version.
06:39:33 DEBUG| [stdout] libcap2-bin is already the newest version.
06:39:33 DEBUG| [stdout] libkeyutils-dev is already the newest version.
06:39:33 DEBUG| [stdout] exim4 is already the newest version.
06:39:33 DEBUG| [stdout] git is already the newest version.
06:39:33 DEBUG| [stdout] 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
06:39:33 DEBUG| Running 'which gcc'
06:39:33 DEBUG| [stdout] /usr/bin/gcc
06:39:33 INFO | GOOD ubuntu_qrt_kernel_panic.setup ubuntu_qrt_kernel_panic.setup timestamp=1516343973 localtime=Jan 19 06:39:33 completed successfully
06:39:33 INFO | END GOOD ubuntu_qrt_kernel_panic.setup ubuntu_qrt_kernel_panic.setup timestamp=1516343973 localtime=Jan 19 06:39:33
06:39:33 DEBUG| Persistent state client._record_indent now set to 1
06:39:33 DEBUG| Persistent state client.unexpected_reboot deleted
06:39:33 INFO | START ubuntu_qrt_kernel_panic.test-kernel-panic.py ubuntu_qrt_kernel_panic.test-kernel-panic.py timestamp=1516343973 localtime=Jan 19 06:39:33
06:39:33 DEBUG| Persistent state client._record_indent now set to 2
06:39:33 DEBUG| Persistent state client.unexpected_reboot now set to ('ubuntu_qrt_kernel_panic.test-kernel-panic.py', 'ubuntu_qrt_kernel_panic.test-kernel-panic.py')
06:39:33 DEBUG| Running 'apt-get install --yes --force-yes git build-essential libcap2-bin gawk execstack exim4 libcap-dev libkeyutils-dev gcc-multilib'
06:39:33 DEBUG| [stdout] Reading package lists...
06:39:33 DEBUG| [stdout] Building dependency tree...
06:39:34 DEBUG| [stdout] Reading state information...
06:39:34 DEBUG| [stdout] build-essential is already the newest version.
06:39:34 DEBUG| [stdout] execstack is already the newest version.
06:39:34 DEBUG| [stdout] gawk is already the newest version.
06:39:34 DEBUG| [stdout] gcc-multilib is already the newest version.
06:39:34 DEBUG| [stdout] libcap-dev is already the newest version.
06:39:34 DEBUG| [stdout] libcap2-bin is already the newest version.
06:39:34 DEBUG| [stdout] libkeyutils-dev is already the newest version.
06:39:34 DEBUG| [stdout] exim4 is already the newest version.
06:39:34 DEBUG| [stdout] git is already the newest version.
06:39:34 DEBUG| [stdout] 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
06:39:34 DEBUG| Running 'which gcc'
06:39:34 DEBUG| [stdout] /usr/bin/gcc
06:39:34 DEBUG| Running 'python ./test-kernel-panic.py -v'
06:39:34 DEBUG| [stdout] Running test: './test-kernel-panic.py' distro: 'Ubuntu 14.04' kernel: '3.13.0-140.189 (Ubuntu 3.13.0-140.189-generic 3.13.11-ckt39)' arch: 'amd64' uid: 0/0 SUDO_USER: 'ubuntu')
06:39:34 ERROR| [stderr] test_cve_2013_2094 (__main__.KernelPanicTest)
06:39:35 ERROR| [stderr] test linux kernel perf out-of-bounds access (CVE-2013-2094) ... ok
06:39:35 ERROR| [stderr] test_cve_2015_7550 (__main__.KernelPanicTest)
06:39:36 DEBUG| [stdout] Skipping private tests
06:39:36 DEBUG| [stdout]
06:43:24 ERROR| [stderr] test linux kernel keyctl race (CVE-2015-7550) ... ok
06:43:24 ERROR| [stderr] test_too_early_vsyscall (__main__.KernelPanicTest)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-140-generic 3.13.0-140.189
ProcVersionSignature: User Name 3.13.0-140.189-generic 3.13.11-ckt39
Uname: Linux 3.13.0-140-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Jan 19 06:49 seq
 crw-rw---- 1 root audio 116, 33 Jan 19 06:49 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.27
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDmesg:
 [ 24.461736]
 [ 24.461818] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
 [ 28.192436] init: plymouth-upstart-bridge main process ended, respawning
Date: Fri Jan 19 06:56:51 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Dell Inc. PowerEdge R310
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-140-generic root=UUID=ded56b2d-3057-4d58-a1e5-422853291ffd ro
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-140-generic N/A
 linux-backports-modules-3.13.0-140-generic N/A
 linux-firmware 1.127.24
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/17/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.8.2
dmi.board.name: 05XKKK
dmi.board.vendor: Dell Inc.
dmi.board.version: A05
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.8.2:bd08/17/2011:svnDellInc.:pnPowerEdgeR310:pvr:rvnDellInc.:rn05XKKK:rvrA05:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R310
dmi.sys.vendor: Dell Inc.