** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
Status: New => Incomplete
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu Trusty)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Trusty)
Status: Incomplete => Triaged
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Tags added: kernel-da-key trusty
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https://bugs.launchpad.net/bugs/1789834
Title:
off-by-one bug in L1TF mitigation
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Trusty:
Triaged
Bug description:
due to an off-by-one bug in the L1TF patch, the "rare" case of systems still
vulnerable
is more frequent.
This typically happens on Nehalem+ destop/entry-level server systems
with 32G memory installed.
Originally this was reported in OpenSUSE, but I can confirm this is
also happens with the latest trusty kernel (3.13.0-157-generic)
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b0a182f875689647b014bc01d36b340217792852
The following patch increases the memory limit for the mitigation on
these systems in general:
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/urgent&id=cc51e5428ea54f575d49cfcede1d4cb3a72b4ec4
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1789834/+subscriptions
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