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Bug 436269 - SELinux is preventing libvirtd (virtd_t) "sigkill" to <Neznámé> (dnsmasq_t)
SELinux is preventing libvirtd (virtd_t) "sigkill" to <Neznámé> (dnsmasq_t)
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
All Linux
low Severity low
: ---
: ---
Assigned To: Daniel Walsh
Fedora Extras Quality Assurance
: SELinux
Depends On:
  Show dependency treegraph
Reported: 2008-03-06 04:38 EST by Matěj Cepl
Modified: 2018-04-11 03:17 EDT (History)
5 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-03-06 10:21:30 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Matěj Cepl 2008-03-06 04:38:49 EST
Description of problem:


SELinux is preventing libvirtd (virtd_t) "sigkill" to <Neznámé> (dnsmasq_t).

Podrobný popis:

SELinux denied access requested by libvirtd. It is not expected that this access
is required by libvirtd and this access may signal an intrusion attempt. It is
also possible that the specific version or configuration of the application is
causing it to require additional access.

Povolení přístupu:

You can generate a local policy module to allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable
SELinux protection altogether. Disabling SELinux protection is not recommended.
Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.

Další informace:

Kontext zdroje                system_u:system_r:virtd_t
Kontext cíle                 system_u:system_r:dnsmasq_t
Objekty cíle                 None [ process ]
Zdroj                         libvirtd
Cesta zdroje                  /usr/sbin/libvirtd
Port                          <Neznámé>
Počítač                    hubmaier.ceplovi.cz
RPM balíčky zdroje          libvirt-0.4.1-2.fc9
RPM balíčky cíle           
RPM politiky                  selinux-policy-3.3.1-10.fc9
Selinux povolen               True
Typ politiky                  targeted
MLS povoleno                  True
Vynucovací režim            Enforcing
Název zásuvného modulu     catchall
Název počítače            hubmaier.ceplovi.cz
Platforma                     Linux hubmaier.ceplovi.cz 2.6.25-0.90.rc3.git5.fc9
                              #1 SMP Tue Mar 4 20:19:33 EST 2008 x86_64 x86_64
Počet uporoznění           2
Poprvé viděno               Út 4. březen 2008, 14:41:23 CET
Naposledy viděno             St 5. březen 2008, 09:58:41 CET
Místní ID                   406e1f6e-0312-4426-9d18-5c361bd9b1df
Čísla řádků              

Původní zprávy auditu      

host=hubmaier.ceplovi.cz type=AVC msg=audit(1204707521.220:14): avc:  denied  {
sigkill } for  pid=2793 comm="libvirtd" scontext=system_u:system_r:virtd_t:s0
tcontext=system_u:system_r:dnsmasq_t:s0 tclass=process

host=hubmaier.ceplovi.cz type=SYSCALL msg=audit(1204707521.220:14):
arch=c000003e syscall=62 success=no exit=-13 a0=ae8 a1=9 a2=a a3=0 items=0
ppid=2741 pid=2793 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0
sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="libvirtd"
exe="/usr/sbin/libvirtd" subj=system_u:system_r:virtd_t:s0 key=(null)

("Neznámé" is "Unknown" in Czech).

Version-Release number of selected component (if applicable):
Comment 1 Daniel Veillard 2008-03-06 04:44:45 EST
How did you get this error, i.e. how to reproduce the problem ? Any idea ?

Comment 2 Daniel Berrange 2008-03-06 08:06:06 EST
Dan, can you add ability for libvirtd  to send KILL/TERM to  dnsmasq to the
SELinux policy, because we spawn / kill  dnsmasq processes from libvirtd to
provide DHCP/DNS services.
Comment 3 Matěj Cepl 2008-03-06 09:35:35 EST
(In reply to comment #1)
> How did you get this error, i.e. how to reproduce the problem ? Any idea ?

Hi, Daniel,

nothing special, just restarted my computer with libvirtd service on, and then
filed (as usual) everything in sealert here. Notice, that I haven't even started
any virtual machine on the computer.
Comment 4 Daniel Walsh 2008-03-06 10:21:30 EST
Fixed in selinux-policy-3.3.1-11.fc9

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