Re: warning about spectre with last kernel update

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On 17/2/18 10:59 pm, Ed Greshko wrote:
On 02/17/18 18:12, François Patte wrote:
I just updated f27 and the new installed kernel
(4.15.3-300.fc27.x86_64), sends these messages at boot time:

kernel: Spectre V2 : Mitigation: Full generic retpoline
kernel: Spectre V2 : System may be vulnerable to spectre v2

What do they mean and what to do? Waiting for next kernel update?

It may mean that your particular CPU is not fully protected by the recent kernel patches.

Cat the files in /sys/devices/system/cpu/vulnerabilities

FWIW, my systems have ....

[egreshko@acer vulnerabilities]$ cat meltdown
Mitigation: PTI
Mine says 'Not affected'.

[egreshko@acer vulnerabilities]$ cat spectre_v1
Mitigation: __user pointer sanitization
Mine is the same.

[egreshko@acer vulnerabilities]$ cat spectre_v2
Mitigation: Full generic retpoline

Mine says 'Mitigation: Full AMD retpoline'.


regards,

Steve




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