Public bug reported:
This is a request to include the following two commits in 16.04 and
18.04 linux-azure:
fc96df16a1ce ("Drivers: hv: vmbus: Return -EINVAL for the sys files for
unopened channels")
ba50bf1ce9a5 ("Drivers: hv: vmbus: Check for ring when getting debug info")
Both commits are fixes to prior commits and have been cc'd to upstream
stable.
Commit fc96df16a1ce is in mainline as of v4.20
Commit ba50bf1ce9a5 is in mainline as of v5.0-rc4
The problem these commits fix is that some of the code for displaying
values for entries in /sys/bus/vmbus don't have appropriate locking to
prevent reading an entry while it is being created or being freed. The
result is accessing a bogus memory address.
** Affects: linux-azure (Ubuntu)
Importance: Undecided
Status: New
** Tags: kernel-hyper-v
** Tags added: kernel-hyper-v
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https://bugs.launchpad.net/bugs/1821378
Title:
[linux-azure] Include mainline commits fc96df16a1ce and ba50bf1ce9a5
in Azure kernel
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