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 'verification-needed-bionic' to 'verification-failed- bionic'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1798897 Title: Linux: insufficient shootdown for paging-structure caches Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Committed Status in linux source package in Cosmic: Fix Released Status in linux source package in DD-Series: Fix Released Bug description: https://bugs.chromium.org/p/project-zero/issues/detail?id=1633 [Impact] Paging structure caches are not always flushed as part of a TLB shootdown operation on x86. [Test Case] Ideally, we'd be able to use the test case described in the Project Zero bug report. However, it depends on certain processor features as well as custom kernel changes to make the proof-of-concept more likely to be successful. Instead, I think we're limited to simple boot testing and then will need to rely on our regular SRU testing. [Regression Potential] Considerable since the changes are in mm/ but these three patches have been released in the upstream linux-stable trees for a while now. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798897/+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
