** Tags added: cscc
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https://bugs.launchpad.net/bugs/1798897
Title:
Linux: insufficient shootdown for paging-structure caches
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This bug was fixed in the package linux - 4.15.0-39.42
---
linux (4.15.0-39.42) bionic; urgency=medium
* linux: 4.15.0-39.42 -proposed tracker (LP: #1799411)
* Linux: insufficient shootdown for paging-structure caches (LP: #1798897)
- mm: move tlb_table_flush to tlb_flush_mmu
Bionic kernel 4.15.0-39.42 (bug 1799411) containing these fixes has been
tested successfully without any regression. Marking verification done
for Bionic.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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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 'verifica
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1798897
Title:
Linux: insufficient shootdown for paging-structure cache
** Description changed:
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
+
This issue is already fixed in the Cosmic kernel (which means that "D"
is also fixed). The Bionic kernel needs these patches:
db7ddef301128dad394f1c0f77027f86ee9a4edb ("mm: move tlb_table_flush to
tlb_flush_mmu_free")
a6f572084fbee8b30f91465f4a085d7a90901c57 ("mm/tlb: Remove tlb_remove_table()
n
