SRU Template
------------
[Impact]
Currently, Hyper-V may be notified of a panic for any die event.
However, this results in false panic notifications for various user
space traps that are die events.
The following commit fixes this by ignoring die events that is not an
oops:
608a973bd52e ("Drivers: hv: vmbus: Only notify Hyper-V for die events
that are oops")
[Test Case]
Without the fix in the Linux VM, do the following to demonstrate the
problem:
1. Create a VM in Azure.
2. Run a user space program that does a divide-by-zero. The user space
program will terminate abnormally because of the error.
3. Monitor notifications in the Azure portal in the Resource Health
section of the VM. There should be a report that the Linux VM has
panicked.
With the fix, do the same steps. The panic report in Step #3 should not
happen.
[Regression Potential]
The risk of regression is low. This patch fixes the issue by ignoring
die events that aren't oops.
The upstream LKML thread mentions that DIE_PANIC may also be something
that should be reported, but it doesn't get emitted anywhere so this
might not be significantly different than DIE_OOPS.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-azure in Ubuntu.
https://bugs.launchpad.net/bugs/1891222
Title:
Only notify Hyper-V for die events that are oops
Status in linux-azure package in Ubuntu:
In Progress
Status in linux-azure-4.15 package in Ubuntu:
In Progress
Status in linux-azure source package in Bionic:
Invalid
Status in linux-azure-4.15 source package in Bionic:
In Progress
Status in linux-azure source package in Focal:
In Progress
Status in linux-azure-4.15 source package in Focal:
Invalid
Bug description:
Currently, Hyper-V may be notified of a panic for any die event.
However, this results in false panic notifications for various user space
traps
that are die events.
The following commit fixes this by ignoring die events that is not an
oops:
608a973bd52e ("Drivers: hv: vmbus: Only notify Hyper-V for die events
that are oops")
We would like to request this commit in all releases supported on
Azure and Hyper-V.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1891222/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
