8:23 a.m.
I have just tagged v9.1.0-rc1 in the repository and pushed signed
tarballs and source RPMs to https://libvirt.org/sources/
Please give the release candidate some testing and in case you find a
serious issue which should have a fix in the upcoming release, feel
free to reply to this thread to make sure the issue is more visible.
If you have not done so yet, please update NEWS.rst to document any
significant change you made since the last release.
Thanks,
Jirka
10:02 a.m.
On Wed, 22 Feb 2023 15:23:04 +0100
Jiri Denemark <jdenemar(a)redhat.com> wrote:
I have just tagged v9.1.0-rc1 in the repository and pushed signed
tarballs and source RPMs to https://libvirt.org/sources/
Please give the release candidate some testing and in case you find a
serious issue which should have a fix in the upcoming release, feel
free to reply to this thread to make sure the issue is more visible.
The "passt" network back-end is entirely non-functional on distributions
shipping with SELinux: the binary helper can't be executed. The
'virsh start' command reports:
error: internal error: Could not start 'passt': libvirt: error : cannot execute
binary /usr/bin/passt: Permission denied
and the guest doesn't start. This is on Fedora 37, but it should be
universally reproducible.
I provided more details on the thread at:
https://listman.redhat.com/archives/libvir-list/2023-February/238096.html
This is the relevant snippet from my domain XML file:
<interface type='user'>
<mac address='52:54:00:36:21:6f'/>
<model type='virtio'/>
<backend type='passt'/>
<address type='pci' domain='0x0000' bus='0x01'
slot='0x00' function='0x0'/>
</interface>
--
Stefano
3:25 a.m.
On Wed, Feb 22, 2023 at 17:02:48 +0100, Stefano Brivio wrote:
On Wed, 22 Feb 2023 15:23:04 +0100
Jiri Denemark <jdenemar(a)redhat.com> wrote:
> I have just tagged v9.1.0-rc1 in the repository and pushed signed
> tarballs and source RPMs to https://libvirt.org/sources/
>
> Please give the release candidate some testing and in case you find a
> serious issue which should have a fix in the upcoming release, feel
> free to reply to this thread to make sure the issue is more visible.
The "passt" network back-end is entirely non-functional on distributions
shipping with SELinux: the binary helper can't be executed. The
'virsh start' command reports:
error: internal error: Could not start 'passt': libvirt: error : cannot
execute binary /usr/bin/passt: Permission denied
and the guest doesn't start. This is on Fedora 37, but it should be
universally reproducible.
I provided more details on the thread at:
https://listman.redhat.com/archives/libvir-list/2023-February/238096.html
This is the relevant snippet from my domain XML file:
<interface type='user'>
<mac address='52:54:00:36:21:6f'/>
<model type='virtio'/>
<backend type='passt'/>
<address type='pci' domain='0x0000' bus='0x01'
slot='0x00' function='0x0'/>
</interface>
Yes, this is quite unfortunate, but there are even distributions that do
not ship SELinux. And this is not a regression since 9.0.0, is it? As
we're in freeze for 9.1.0 release so reasonable bug fixes considered
safe (as in the chance for them to break more than they are fixing is
considered low) are welcome. But if, e.g., a patch (series) even though
being a bug fix contains a nontrivial refactor, it should really wait
until after the release. Unless it's fixing a critical bug.
That said, if this can reasonably be fixed without risking other issues
before the release, we can do so. But otherwise since this is a new
functionality and SELinux is not present in all distributions, there's
no reason to push something big and risky at the last moment or delay
the release because of this issue. We don't do this for AppArmor either.
Jirka
5 a.m.
On Thu, 23 Feb 2023 10:25:28 +0100
Jiri Denemark <jdenemar(a)redhat.com> wrote:
On Wed, Feb 22, 2023 at 17:02:48 +0100, Stefano Brivio wrote:
> On Wed, 22 Feb 2023 15:23:04 +0100
> Jiri Denemark <jdenemar(a)redhat.com> wrote:
>
> > I have just tagged v9.1.0-rc1 in the repository and pushed signed
> > tarballs and source RPMs to https://libvirt.org/sources/
> >
> > Please give the release candidate some testing and in case you find a
> > serious issue which should have a fix in the upcoming release, feel
> > free to reply to this thread to make sure the issue is more visible.
>
> The "passt" network back-end is entirely non-functional on distributions
> shipping with SELinux: the binary helper can't be executed. The
> 'virsh start' command reports:
>
> error: internal error: Could not start 'passt': libvirt: error : cannot
execute binary /usr/bin/passt: Permission denied
>
> and the guest doesn't start. This is on Fedora 37, but it should be
> universally reproducible.
>
> I provided more details on the thread at:
> https://listman.redhat.com/archives/libvir-list/2023-February/238096.html
>
> This is the relevant snippet from my domain XML file:
>
> <interface type='user'>
> <mac address='52:54:00:36:21:6f'/>
> <model type='virtio'/>
> <backend type='passt'/>
> <address type='pci' domain='0x0000' bus='0x01'
slot='0x00' function='0x0'/>
> </interface>
Yes, this is quite unfortunate, but there are even distributions that do
not ship SELinux.
There's an issue with a similar outcome (albeit different nature) for
AppArmor, and I'm working on it with Andrea (who maintains the libvirt
Debian package -- I maintain the passt one). Fixing that doesn't require
code changes in libvirt, though.
And this is not a regression since 9.0.0, is it?
It's not.
As we're in freeze for 9.1.0 release so reasonable bug fixes
considered
safe (as in the chance for them to break more than they are fixing is
considered low) are welcome. But if, e.g., a patch (series) even though
being a bug fix contains a nontrivial refactor, it should really wait
until after the release. Unless it's fixing a critical bug.
I totally agree (of course...). I think it's a reasonable policy.
A refactor of even two/three functions of the security manager wouldn't
seem to fit this. I might be wrong as I'm not familiar with that code,
but that's the impression I had. Big or small, nobody implemented it
in time for 9.1.0.
That said, if this can reasonably be fixed without risking other
issues
before the release, we can do so. But otherwise since this is a new
functionality and SELinux is not present in all distributions, there's
no reason to push something big and risky at the last moment or delay
the release because of this issue. We don't do this for AppArmor either.
Note: I'm not discussing about progress here -- this is just for the
records.
Also for the records: wouldn't it be appropriate to mark the
functionality as broken (with SELinux), so that users don't waste their
time thinking they're doing something wrong? This is the main reason
why I wanted to have this working in 9.1.0 by the way.
I proposed two different fixes (one was almost entirely proposed by
Michal to be fair -- I just added the bugs you found), which I tested
quite thoroughly (unlike what was merged in 9.0.0, which, my bad, I
didn't have time to review).
Neither of them is what I'd call "big". Note that 2/3 and 3/3 are
unrelated fixes (and 3/3 is already merged):
v1:
1 file changed, 1 insertion(+), 6 deletions(-)
The functionality can be used without disabling SELinux, the correct
domain transition happens.
Risk: the MCS part of the labels of different passt instances is the
same, which is not ideal (i.e. SELinux wouldn't prevent one passt
process to write the PID file of another passt process), but it's
obviously a minor degradation compared to "setenforce 0".
v2:
1 file changed, 27 insertions(+), 6 deletions(-)
The MCS part of SELinux labels is also differentiated between
instances.
Risk: the missing #ifdef you just pointed out and (potentially)
similar issues.
--
Stefano
8:08 a.m.
New subject: libvirt-9.1.0 release candidate 2
I have just tagged v9.1.0-rc2 in the repository and pushed signed
tarballs and source RPMs to https://libvirt.org/sources/
Please give the release candidate some testing and in case you find a
serious issue which should have a fix in the upcoming release, feel
free to reply to this thread to make sure the issue is more visible.
If you have not done so yet, please update NEWS.rst to document any
significant change you made since the last release.
Thanks,
Jirka
802
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4 comments
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participants (2)
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Jiri Denemark -
Stefano Brivio