Private bug reported:
The current implementation is incomplete and there are paths from kernel
to userspace on which the CPU buffers are not cleared.
Fix that by backporting the MDS_USER_CLEAR_CPU_BUFFERS macro from stable
3.16 and use that in assembly entry/exit code.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Information type changed from Public to Private
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1833047
Title:
MDS: CPU buffers are not cleared on all paths from kernel to userspace
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Precise:
New
Status in linux source package in Trusty:
New
Bug description:
The current implementation is incomplete and there are paths from
kernel to userspace on which the CPU buffers are not cleared.
Fix that by backporting the MDS_USER_CLEAR_CPU_BUFFERS macro from
stable 3.16 and use that in assembly entry/exit code.
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1833047/+subscriptions
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