On Thu, 15 Mar 2018, Peter Steinmetz wrote: > should be fixed wrt meltdown. But I see this > # grep -R . /sys/devices/system/cpu/vulnerabilities/ > /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full generic > retpoline > /sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user pointer > sanitization > /sys/devices/system/cpu/vulnerabilities/meltdown:Vulnerable > > Why / what am I missing?
Check the kernel boot log using either dmesg or "journalctl -k -b". Look for "Kernel/User page tables isolation". Here, that same kernel reports "Mitigation: PTI" in /sys/devices/system/cpu/vulnerabilities/meltdown and: # uname -rv ; journalctl -k -b | grep isolation 4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02) [redacted] kernel: Kernel/User page tables isolation: enabled -- Henrique Holschuh
