RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 631952 - policy prevents qemu-kvm wrapper script
Summary: policy prevents qemu-kvm wrapper script
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: selinux-policy
Version: 6.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Karel Srot
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-09-08 18:14 UTC by Alex Williamson
Modified: 2011-05-19 11:54 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-19 11:54:57 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0526 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2011-05-19 09:37:41 UTC

Description Alex Williamson 2010-09-08 18:14:18 UTC
Description of problem:

Trying to create a simple wrapper:

$ cat /usr/libexec/qemu-kvm.foo
#!/bin/sh
exec /usr/libexec/qemu-kvm "$@"

And setting permissions via restorecon:

$ ls -Z /usr/libexec/qemu-kvm*
-rwxr-xr-x. root root system_u:object_r:qemu_exec_t:s0 /usr/libexec/qemu-kvm
-rwxr-xr-x. root root system_u:object_r:qemu_exec_t:s0 /usr/libexec/qemu-kvm.foo

Results in exec_no_trans errors in audit.log.  audit2allow resolves the problem.  As the transition is safe, selinux should allow this by default.

Version-Release number of selected component (if applicable):
selinux-policy-3.7.19-42.el6.noarch

How reproducible:
100%

Steps to Reproduce:
1. See description above
2. virsh edit <guest domain> # point emulator at qemu-kvm.foo
3. virst start <guest domain>
  
Actual results:
Fail, audit.log error

Expected results:
Works

Additional info:

This is the change that seems to make it work:

module qemutxtimer 1.0;

require {
	type svirt_t;
	type qemu_exec_t;
	type qemu_t;
	class file execute_no_trans;
}

#============= qemu_t ==============
#!!!! This avc is allowed in the current policy

allow qemu_t qemu_exec_t:file execute_no_trans;

#============= svirt_t ==============
allow svirt_t qemu_exec_t:file execute_no_trans;

Comment 1 Daniel Walsh 2010-09-08 18:19:55 UTC
Miroslav can you grab the updates for F14 which have fixes for this.

Comment 3 Miroslav Grepl 2010-09-16 15:57:13 UTC
Fixed in selinux-policy-3.7.19-55.el6.noarch.

Comment 9 errata-xmlrpc 2011-05-19 11:54:57 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0526.html


Note You need to log in before you can comment on or make changes to this bug.