This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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With intel-microcode 3.20180312, kernel reports as broken spectre v2
Status in linux package in Ubuntu:
With an intel-microcode package based off of
Microcode-Data-File, when booting, the kernel 4.15.0-10.11-generic
reports the following in dmesg:
[ 0.000000] microcode: microcode updated early to revision 0x84, date =
[ 0.000000] Intel Spectre v2 broken microcode detected; disabling
And indeed, none of ibrs, ibpb, or stibp show up in /proc/cpuinfo.
Other testers of the updated microcode report seeing the same thing.
The processor this is being tested on is:
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0x84
The test for the microcode is in https://git.launchpad.net/~ubuntu-
; specifically, it looks like bad_spectre_microcode(c) is returning
has not been pulled in yet (though it's staged as
3e442a86b70eea274d01569244584d91e2f287e7 in bionic/master-next and is
in 4.15.0-12.13 in bionic-proposed), which addresses things for Kaby
Lake processors, but other processers may need to be verified for
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