Re: debugging 15.0-RELEASE kernel on 15.0p3?

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From: vermaden <vermaden_at_interia.pl>
Date: Tue, 17 Feb 2026 22:57:45 UTC
Hi,



> pkg: No SRV record found for the repo 'FreeBSD-base'

Generally this switch helps to overcome that (if its not DNS issue):

-  url: "pkg+https://pkg.FreeBSD.org/${ABI}/base_release_${VERSION_MINOR}",
+  url: "https://pkg.FreeBSD.org/${ABI}/base_release_${VERSION_MINOR}",
-  mirror_type: "srv",
+  mirror_type: "none",

Details here:
- https://vermaden.wordpress.com/2026/01/07/freebsd-and-poudriere-in-high-security-environments/



> The older packages are actually still there, but there's no way for you to find them.

I would consider enabling 'dirlisting' for all pkg(8) related repositories ... this 'blindness' does not help - it has been reported many times that how many 'workarounds' one needs to do to manually fetch needed pkg(8) package.



Regards,
vermaden











Temat: Re: debugging 15.0-RELEASE kernel on 15.0p3?
Data: 2026-02-17 21:17
Nadawca: "Colin Percival" &lt;cperciva@tarsnap.com>
Adresat: "Alan Somers" &lt;asomers@freebsd.org>; "Michael W. Lucas" &lt;mwl@mwl.io>; 
DW: stable@freebsd.org; 

> 
>> On 2/17/26 11:41, Alan Somers wrote:
>> On Tue, Feb 17, 2026 at 12:37 PM Michael W. Lucas 
wrote:
>>> This host didn't have kernel debug symbols. I went to install them
and
>>> discovered my host needed updates. Thoughtlessly, I grabbed the new
>>> kernel and the new symbols.
>>>
>>> Oops. You can't debug a 15.0 kernel on 15.0p3.
>>>
>>> bucket/var/crash;kgdb -n 0
>>> kgdb: couldn't find a suitable kernel image
>>>
>>> I have a 15.0 boot environment I could boot into, if there's a way
to
>>> install the debugging symbols? Or is there a way to pull the old
>>> kernel and debug symbols down on the current BE?
>>>
>>> On dch's advice I tried setting the pkg.conf URL:
>>>    url:
>>>
"pkg+https://cloudfront.aws.pkgbase.freebsd.org/FreeBSD:15:amd64/base_release_
>>> 0/"
>>> but got:
>>> pkg: No SRV record found for the repo 'FreeBSD-base'
> 
> That isn't going to work because pkg+https says "look up SRV records"
and the
> cloudfront.aws.pkgbase.freebsd.org endpoint is *what the SRV record
points
> at*.  You could have used pkg+https://pkg.freebsd.org/, but that
wasn't going
> to work anyway since the repo will give you the latest packages (aka
the -p3
> kernel).
> 
> The older packages are actually still there, but there's no way for
you to
> find them.
> 
>> You can probably install the symbols from the DVD image.  They're in
>> the kernel-dbg.txz dist set.  That should work for you, since your
>> crash happened in 15.0.  But the same technique wouldn't work if you
>> had crashed at, say, 15.0-p1.
> 
> The DVD image is the way to go.  Either from kernel-dbg.txz or from
the
> pkgbase repo on the DVD image.  But as Alan notes, this only works
because
> you crashed on the original release.
> 
> We should probably consider creating a separate stash of kernel debug
packages
> so people can fetch a not-most-recent version if needed.  I never
thought
> about this until now.
> 
> Oh, a third option is to boot up an EC2 15.0-RELEASE-p1 image ("base"
or
> "cloud-init"; "small" doesn't have debug symbols).  But I'm guessing
you'd
> prefer to look at your panic locally.
> 
> -- 
> Colin Percival
> FreeBSD Release Engineering Lead &amp; EC2 platform maintainer
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly
paranoid
> 
> 
> 
>