** Changed in: ubuntu-kernel-tests
Status: Triaged => Fix Released
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To manage
This bug was fixed in the package linux - 4.15.0-91.92
---
linux (4.15.0-91.92) bionic; urgency=medium
* bionic/linux: 4.15.0-91.92 -proposed tracker (LP: #1865109)
* CVE-2020-2732
- KVM: x86: emulate RDPID
- KVM: nVMX: Don't emulate instructions in guest mode
- KVM:
** Changed in: ubuntu-kernel-tests
Status: New => Triaged
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To manage
Confirmed this is now fixed with bionic/linux 4.15.0-90.91:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac
/autopkgtest-bionic/bionic/amd64/l/linux/20200227_101305_5debc@/log.gz
---
10:00:50 DEBUG| [stdout] vm-segv STARTING
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => In Progress
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To
On a arm64 node we had some more useful console logs:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac
/autopkgtest-bionic/bionic/arm64/l/linux/20200223_153549_99119@/log.gz
[ 7400.666431] rcu_sched kthread starved for 240027 jiffies! g460241 c460240
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To manage
I confirm in my testing I get a hard kernel lockup with no log output.
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To manage
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => Confirmed
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The offending commit appears to be:
5b9276f0312a apparmor: don't try to replace stale label in ptrace access
check
Which isn't surprising (it's both ptrace and apparmor related). Note however
that I did not encounter the log-flooding that was seen in the ADT testing. The
only symptom I
** Changed in: stress-ng
Assignee: Colin Ian King (colin-king) => Kleber Sacilotto de Souza
(kleber-souza)
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Title:
vm-segv from
To reproduce (on an 8 CPU VM):
sudo apt-get update && sudo apt-get dist-upgrade
sudo apt-get build-dep stress-ng
git clone git://kernel.ubuntu.com/cking/stress-ng
cd stress-ng
make
sudo ./stress-ng --vm-segv 0 -t 10 -v
Comment out a ptrace line and rebuild and re-run and the hang does not
occur.
I spoke too soon. I was able to trip this 4.15.0-89.89 but not
4.15.0-88. So this looks like a regression.
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Title:
vm-segv from
I can't reproduce this on the systems I'm using. Can I get access to
onibi to try and reproduce this issue?
** Changed in: stress-ng
Status: In Progress => Incomplete
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Do you have any info on the number of CPUs, memory and swap size of
onibi? I can then see if I can reproduce the issue. Or better, access to
onibi would be most helpful to see if I can repro this issue.
** Changed in: stress-ng
Status: New => In Progress
** Changed in: stress-ng
BTW this test has passed on another node "kili" on 4.15.0-89.89~16.04.1
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Title:
vm-segv from ubuntu_stress_smoke_test failed on B
To manage
** Description changed:
- Issue found on node onibi
+ Issue found on node onibi, with kernel 4.15.0-89.89/ 4.15.0-89.89~16.04.1
Reproduce rate: 2/2 on generic kernel, 2/2 on lowlatency kernel, 2/2 on X-hwe
generic kernel
Test hang with vm-segv:
05:58:36 DEBUG| [stdout] vm-addr PASSED
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