** Changed in: linux-azure-cvm (Ubuntu Focal)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1956793
Title:
linux-azure-cvm: Avoid leaking guest memory when communicating with
the host
Status in linux-azure-cvm package in Ubuntu:
New
Status in linux-azure-cvm source package in Focal:
Fix Committed
Bug description:
[Impact]
Initialize memory of request offers message to be sent to the host so
padding or uninitialized fields do not leak guest memory contents.
Patch:
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?h=hyperv-
next
[Test case]
Testing the information leakage to the host is not viable, but since
the patch the vmbus layer that affects all the hyper-v drivers, a boot
test on Hyper-V and on Azure should be enough to validate the patch,
considering how small the change is.
[Potential regression]
The change is very restricted, but on an eventual regression it might
affect any of the hyperv guest drivers.
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