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Bug 1141228 - --attach doesn't work with SELinux
Summary: --attach doesn't work with SELinux
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: virt-viewer
Version: 7.2
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: rc
: 7.2
Assignee: Virt Viewer Maint
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 999926 1181288
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-09-12 13:27 UTC by Ján Tomko
Modified: 2015-11-19 07:34 UTC (History)
18 users (show)

Fixed In Version: virt-viewer-2.0-1.el7
Doc Type: Bug Fix
Doc Text:
Clone Of: 999926
Environment:
Last Closed: 2015-11-19 07:34:40 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2211 0 normal SHIPPED_LIVE virt-viewer, spice-gtk, and libgovirt bug fix and enhancement update 2015-11-19 08:27:40 UTC

Description Ján Tomko 2014-09-12 13:27:03 UTC 
virt-viewer doing --attach passes a socket created by socketpair() to libvirtd via the virDomainOpenGraphics API.

Libvirt is unable to change the label on the socket after it has been created, so this results in AVC denials (see bug 999926).

To fix this, virDomainOpenGraphicsFD has been introduced, which leaves the socket creation to libvirt:
https://bugzilla.redhat.com/show_bug.cgi?id=999926#c39

Pending upstream patch for virt-viewer that uses the new API for --attach:
https://www.redhat.com/archives/virt-tools-list/2014-September/msg00096.html
Comment 2 RHEL Program Management 2014-09-29 22:45:55 UTC 
Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.
Comment 3 Ján Tomko 2014-09-30 14:07:57 UTC 
v2 of the patch:
https://www.redhat.com/archives/virt-tools-list/2014-September/msg00275.html
Comment 4 Fabiano Fidêncio 2014-10-01 17:04:26 UTC 
Patch was pushed upstream but, the fix itself, depends on libvirt 1.2.8.
Comment 9 zhoujunqin 2015-06-23 08:33:13 UTC 
Environment setup:
# getenforce 
Enforcing

I can reproduce this issue with package:
libvirt-1.2.16-1.el7.x86_64
virt-viewer-0.6.0-12.el7.x86_64

Steps to reproduce:
# virt-viewer -c qemu:///session --debug --attach rhel7.1
...

Get audit.log:
# cat  /var/log/audit/audit.log |grep -i AVC 
type=AVC msg=audit(1435047455.297:1367): avc:  denied  { setopt } for  pid=21672 comm="qemu-kvm" scontext=system_u:system_r:svirt_t:s0:c10,c912 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket
type=AVC msg=audit(1435047455.297:1368): avc:  denied  { getattr } for  pid=21672 comm="qemu-kvm" scontext=system_u:system_r:svirt_t:s0:c10,c912 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket
type=AVC msg=audit(1435047455.297:1369): avc:  denied  { getattr } for  pid=21672 comm="qemu-kvm" scontext=system_u:system_r:svirt_t:s0:c10,c912 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket
type=AVC msg=audit(1435047455.297:1370): avc:  denied  { getattr } for  pid=21672 comm="qemu-kvm" scontext=system_u:system_r:svirt_t:s0:c10,c912 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket
type=AVC msg=audit(1435047455.297:1371): avc:  denied  { getattr } for  pid=21672 comm="qemu-kvm" scontext=system_u:system_r:svirt_t:s0:c10,c912 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket


Then try to verify this bug with new build:
libvirt-1.2.16-1.el7.x86_64
virt-viewer-2.0-3.el7.x86_64

Steps to verify:

# virt-viewer -c qemu:///session --debug --attach rhel7.1 
...

# cat  /var/log/audit/audit.log |grep -i AVC

Result: There is no AVC info in audit.log.

So move this bug from ON_QA to VERIFIED.
Comment 11 errata-xmlrpc 2015-11-19 07:34:40 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2211.html
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