This issue can be reproduced with KVM nodes on our BareMetal MAAS Step to reproduce: 1. Deploy a KVM node with Xenial / Bionic 2. sudo apt install gcc build-essential cpu-checker qemu-kvm git 3. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/kvm-unit-tests/ -b disco 4. cd kvm-unit-tests 5. ./configure 6. make standalone 7. cd tests 8. sudo ./vmx_nm_test BUILD_HEAD=4671e4ba timeout -k 1s --foreground 30 /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.wHvN1CDAeZ -smp 1 -cpu host,+vmx -append vmx_nm_test # -initrd /tmp/tmp.J5VNtXChPd enabling ap (Test interrupted here)
When this happens, the node will stop responding, nothing special can be found in syslog. The virsh on the host will show it's been paused: $ virsh list Id Name State ---------------------------------------------------- 533 curly paused ** Summary changed: - vmx_nm_test in ubuntu_kvm_unit_tests interrupted on X-oracle-4.15 + vmx_nm_test in ubuntu_kvm_unit_tests interrupted on X-oracle-4.15 / X-KVM / B-KVM ** Tags added: 4.4 bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-oracle in Ubuntu. https://bugs.launchpad.net/bugs/1872401 Title: vmx_nm_test in ubuntu_kvm_unit_tests interrupted on X-oracle-4.15 / X-KVM / B-KVM Status in ubuntu-kernel-tests: New Status in linux-signed-oracle package in Ubuntu: New Bug description: This issue was first spotted on Mar.16 [1] The ubuntu_kvm_unit_tests will be interrupted on X-oracle-4.15 on both VM.Standard2.1 and VM.Standard2.16, this is not a regression since it can be reproduced with 4.15.0-1031-oracle #34~16.04.1: Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/vmx_nm_test' BUILD_HEAD=4671e4ba timeout -k 1s --foreground 30 /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.da3iFrsCzC -smp 1 -cpu host,+vmx -append vmx_nm_test # -initrd /tmp/tmp.h2DFw8L0AF enabling apic paging enabled cr0 = 80010011 cr3 = 477000 cr4 = 20 Test suite: vmx_nm_test client_loop: send disconnect: Broken pipe (node disconnected here) Before the test started, this can be found in syslog: Apr 13 06:26:25 selfprovisioned-phlin-kvm-unit kernel: [ 1073.529005] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. After that, noting was printed and node disconnected. If you try to run this case manually, it will stop at: # ./vmx_nm_test BUILD_HEAD=4671e4ba ready!!! timeout -k 1s --foreground 30 /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.ZcGrnXu6se -smp 1 -cpu host,+vmx -append vmx_nm_test # -initrd /tmp/tmp.ADjEOAcRKM enabling ap (stopped here, even the "enabling apic" string was not printed) It looks like this is a new test case added since the cycle of 4.15.0-1037.41~16.04.1-oracle [1] https://bugs.launchpad.net/ubuntu-kernel- tests/+bug/1867623/comments/2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-1031-oracle 4.15.0-1031.34~16.04.1 ProcVersionSignature: User Name 4.15.0-1031.34~16.04.1-oracle 4.15.18 Uname: Linux 4.15.0-1031-oracle x86_64 ApportVersion: 2.20.1-0ubuntu2.21 Architecture: amd64 Date: Mon Apr 13 05:18:03 2020 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-oracle UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1872401/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
