[SRU][Bionic/Artful] fix false positives in W+X checking

Manoj Iyer manoj.iyer at canonical.com
Wed May 9 13:45:44 UTC 2018

On Wed, 9 May 2018, Paolo Pisati wrote:

> On Tue, May 8, 2018 at 6:24 PM, Manoj Iyer <manoj.iyer at canonical.com> wrote:
>> Please consider this patch to Bionic, Artful and apply to Cosmic. On
>> ARM64 system from Cavium and Qualcomm we see random false positive
>> warning messages wrt W+X checking.  "arm64/mm: Found insecure W+X mapping at address 0000000000a99000/0xa99000" while booting.
>> A kernel with the upstream patch is avaliable in ppa:manjo/lp1769696,
>> the patch was cleanly cherry-picked from linux-next on to bionic and
>> also cleanly applies to Artful. I tested the kernel on a QTI QDF2400 and
>> Cavium ThunderX system. Since we cannot reliably and consistently
>> reproduce the warning, I did not see the warning after doing repeated
>> reboots with stock bionic.
> Which patch?
> There's no patch attached to this message, resend following the SRU guideline:

Here it is on the mailing list.. did it now show up on your inbox?

[SRU][Bionic/Artful] fix false positives in W+X checking   Manoj Iyer
[PATCH] init: fix false positives in W+X checking   Manoj Iyer
[SRU][Bionic/Artful] fix false positives in W+X checking   Paolo Pisati

> https://wiki.ubuntu.com/Kernel/Dev/StablePatchFormat
> -- 
> bye,
> p.

Manoj Iyer
ARM Servers - Cloud

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