Opened 6 months ago

Closed 5 months ago

#15236 closed bug (fixed)

[x86_64] Add LFENCE after SWAPGS

Reported by: waddlesplash Owned by: waddlesplash
Priority: normal Milestone: Unscheduled
Component: System/Kernel Version: R1/Development
Keywords: Cc:
Blocked By: Blocking:
Has a Patch: no Platform: x86-64

Description

FreeBSD commit: https://github.com/freebsd/freebsd/commit/f4038696064b8626020cb176ebd564395b833795

This is to patch yet another CPU vulerability: https://arstechnica.com/information-technology/2019/08/silent-windows-update-patched-side-channel-that-leaked-data-from-intel-cpus/

This looks like the simplest Intel mitigation yet, so there's no reason we can't apply it.

Change History (1)

comment:1 by waddlesplash, 5 months ago

Resolution: fixed
Status: assignedclosed

Fixed in hrev53375.

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