[CentOS-devel] centos 7.8 and kernel-3.10.0-1127.18.2.el7

Johnny Hughes

johnny at centos.org
Thu Aug 6 22:41:34 UTC 2020

On 8/6/20 11:58 AM, Stefan Puiu wrote:
> Hi,
> We have a CentOS 7 -based (more accurately, CentOS 7 atomic
> host-based) distro that we build and run on specialized hardware. For
> the kernel, we pick the CentOS 7 kernel, apply two patches (and a
> different configuration) and build it. We're mostly following CentOS
> 7.8 at the moment, and using the 3.10.0-1127.13.1 kernel.
> A few days ago, I noticed kernel-3.10.0-1127.18.2.el7 was out (and
> it's labeled as a security update -
> https://lists.centos.org/pipermail/centos-announce/2020-July/035780.html),
> so I decided to build it. Our kernel build process involves
> downloading the src.rpm, patching the spec and then calling rpmbuild.
> For this latest kernel, our spec patch (which adds our 2 patches)
> failed to apply - as far as I can tell, the hunks where patches are
> listed, like this one:
> ==
> @@ -449,6 +449,8 @@
>  Patch1000: debrand-single-cpu.patch
>  Patch1001: debrand-rh_taint.patch
>  Patch1002: debrand-rh-i686-cpu.patch
> +Patch88881: kernel_ixia.patch
> +Patch88882: at24.patch
>  BuildRoot: %{_tmppath}/kernel-%{KVRA}-root
>  ==
> I checked the new spec file, and the debrand patches are missing.
> Looking at https://git.centos.org/rpms/kernel/commits/c7 (let me know
> if that's the right place), I see there's a debranding change
> (https://git.centos.org/rpms/kernel/c/548139faa91edfe29fc84695da827230de3c5d4f?branch=c7),
> but it simply added a README saying debranding failed.
> Do I need to wait for a new change fixing this? I see older kernels
> have a "debranding" commit and then a "Manual CentOS Debranding"
> commit, is something like that required now as well?
> Thanks in advance,
> Stefan.
> _______________________________________________

We will better debrand the next kernel .. we were eliminating items to
get better builds from the shim / kernel error issues over the weekend
and did not get the debranding completely in that kernel, but it worked,
so we released it.

The next kernel will be more normal and with less urgency .. it should
have all the patches.

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