Linux 4.4 & 4.9 Kernels Get Back-Ported SWAPGS Protection

[Joe Braga]

Blah that patch to exclude AMD seems does not work here

cat /sys/devices/system/cpu/vulnerabilities/spectre_v1
Mitigation: usercopy/swapgs barriers and __user pointer sanitization

This is on AMD with 4.19 kernel, so where that flag is? This looks like to me as shit is enabled Seems this does not correctly exclude AMD or whatever

How this? Because AMD is not affected with SWAPGS

[aufkrawall]

Good thing we got all new cases covered, with mitigations=off. =)

[phoronix]

Phoronix: Linux 4.4 & 4.9 Kernels Get Back-Ported SWAPGS Protection

Greg Kroah-Hartman issued the Linux 4.4.189 and Linux 4.9.189 LTS kernels on Sunday morning that address the new Spectre V1 "SWAPGS" variant mitigations...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.4-4.9-SWAPGS-Kernel