<div dir="ltr"><div>Hi,</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 14 Mar 2022 at 12:50, Lexi Haley <<a href="mailto:lhaley@meditech.com">lhaley@meditech.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Khaled,<br><div><br></div><div>Thank you for your reply; and also for the tip that this setting is enabled in the 5.15 series. I wonder if a 5.15 gcp package will make its way into the 20.04 focal release; that would be perfectly sufficient to meet my interests in this.</div></div></blockquote><div><br></div><div><br></div><div>Eventually the v5.15 based gcp package will make its way into the 20.04 focal release. The exact timings depend on release schedules, testing & validation. As a rough guide it will probably happen during the "spring/summer 2022".</div><div><br></div><div>Regards,</div><div><br></div><div>Dimitri.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Best wishes,</div><div>Lexi</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 10, 2022 at 4:26 PM Khaled Elmously <<a href="mailto:khalid.elmously@canonical.com" target="_blank">khalid.elmously@canonical.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
<br>
On 2022-03-10 13:02:03 , Lexi Haley wrote:<br>
> Hello and greetings,<br>
> <br>
> I am attempting to gain some insight into the decision making process that<br>
> goes into the kernel configuration choices selected for a given variant<br>
> kernel. I have rummaged around the Ubuntu Kernel Wiki, applied search<br>
> strings to the downloaded kernel-archive mailing list mbox, and bounced<br>
> around on the Ubuntu Launchpad - all without finding either information on<br>
> the general review process, or finding specifics on the particular detail<br>
> I'm interested in.<br>
> <br>
> What am I interested in exactly? In the gcp kernel variants the<br>
> CONFIG_UNICODE (UTF-8 normalization and casefolding support) option is<br>
> disabled. This configuration option arrived via (assuming I've trawled<br>
> around correctly):<br>
> <a href="https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-gcp/+git/eoan/commit/debian.gcp/config/config.common.ubuntu?id=2116ddb07ec8700610fbb17f751d76e0602a6109" rel="noreferrer" target="_blank">https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-gcp/+git/eoan/commit/debian.gcp/config/config.common.ubuntu?id=2116ddb07ec8700610fbb17f751d76e0602a6109</a><br>
> , and was set to unset (off).<br>
> <br>
> As to why, there are two guesses I might make:<br>
> <br>
> One: As the gcp kernel variant already exists with a set of known<br>
> configuration values, perhaps anything new and considered optional is left<br>
> unset, until such time as an issue is made asking for it (example,<br>
> <a href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1849493" rel="noreferrer" target="_blank">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1849493</a>) - perhaps I<br>
> should submit an issue?<br>
> <br>
> Two: Perhaps this specific configuration was left unset per concerns a la<br>
> <a href="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21300" rel="noreferrer" target="_blank">https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21300</a> - in which<br>
> case submitting an issue would probably not be fruitful? ( though I<br>
> believe the post<br>
> <a href="https://groups.google.com/g/linux.debian.kernel/c/cjjL57wyVYY/m/ld3tC39UBgAJ" rel="noreferrer" target="_blank">https://groups.google.com/g/linux.debian.kernel/c/cjjL57wyVYY/m/ld3tC39UBgAJ</a><br>
> makes a nice case for why the CVE isn't precisely cause to leave this<br>
> unavailable).<br>
<br>
I think your guesses are mostly accurate.<br>
<br>
The Ubuntu variant kernels are based on the Ubuntu master kernels, which are in <br>
turn based on the mainline kernels (plus patches from upstream stable kernels).<br>
At any stage, we generally make changes only as necessary.<br>
<br>
That necessity can come from any of several places. It can come from our<br>
own needs/testing, or in the case of something like the cloud kernels, it<br>
can come as a request from the cloud partner, or it can come from users <br>
who call our attention to specific things. It can be for CVEs or <br>
bug-fixes, or it can be for feature-enablement. There is no one hard rule.<br>
<br>
I do not know why CONFIG_UNICODE specifically is off. My guess is that we just <br>
simply had no reason to change the default value. (That CVE that you mentioned <br>
appears to be a git CVE, not a kernel CVE, so it may not be relevant).<br>
<br>
CONFIG_UNICODE is enabled in the main kernels and in the 5.15 gcp kernel. I <br>
am not aware of a reason that prevents it from being enabled for the 5.4 gcp <br>
kernel too.<br>
<br>
I have created this bug to track the issue:<br>
<a href="https://bugs.launchpad.net/ubuntu/+source/linux-gcp/+bug/1964527" rel="noreferrer" target="_blank">https://bugs.launchpad.net/ubuntu/+source/linux-gcp/+bug/1964527</a><br>
<br>
<br>
Feel free to add any additional info.<br>
Thanks<br>
Khaled<br>
<br>
> <br>
> And of course, the rationale might be something I have no clue at - So I am<br>
> asking if someone might point me in the right direction - either towards<br>
> the background information I seek, or perhaps specifically suggesting that<br>
> I open an issue.<br>
> <br>
> My thanks, and I appreciate your time,<br>
> Lexi Haley<br>
> <br>
> -- <br>
> <br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:13pt;font-family:Verdana;color:rgb(0,0,0);font-weight:700;vertical-align:baseline;white-space:pre-wrap">Lexi Haley </span><span style="color:rgb(102,102,102);font-family:Verdana;font-size:13.3333px;white-space:pre-wrap">(she/her/hers)</span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap">Computer Scientist, System Tools, Advanced Technology Division</span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap">Medical Information Technology, Inc.</span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap">Office: 781-774-5156 | Mobile: 508-713-2499</span></p><p style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><font face="Verdana"><span style="font-size:13.3333px;white-space:pre-wrap"><a href="mailto:lhaley@meditech.com" target="_blank">lhaley@meditech.com</a></span></font></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap">MEDITECH Circle, Westwood, MA 02090</span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap">Main: 781-821-3000 | Fax: 781-821-2199</span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap"><br></span></p><p dir="ltr" style="color:rgb(80,0,80);line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Verdana;color:rgb(102,102,102);vertical-align:baseline;white-space:pre-wrap"><a href="https://ehr.meditech.com/diversity-at-meditech" target="_blank"><b>Diversity at MEDITECH</b></a><br></span></p></div></div></div></div></div></div>
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