Bug 652644

Summary: SELinux is preventing qemu-kvm (svirt_t) "read, write, unlink" to ./kvm.MhzoQ3 (hugetlbfs_t)
Product: Red Hat Enterprise Linux 5 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: low    
Version: 5.6CC: dwalsh, yoyzhang
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-2.4.6-294.el5 Doc Type: Bug Fix
Doc Text:
Due to an error in the SELinux policy, SELinux prevented the qemu-kvm command from accessing HugeTLBfs devices. This update corrects the SELinux rules to allow this access.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2011-01-13 21:51:17 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Milos Malik 2010-11-12 12:40:13 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
kmod-kvm-83-207.el5
kvm-83-207.el5
kvm-tools-83-207.el5
selinux-policy-2.4.6-292.el5
selinux-policy-devel-2.4.6-292.el5
selinux-policy-minimum-2.4.6-292.el5
selinux-policy-mls-2.4.6-292.el5
selinux-policy-strict-2.4.6-292.el5
selinux-policy-targeted-2.4.6-292.el5

How reproducible:
always

Steps to Reproduce:
Run following automated test on x86_64 machine which supports virtualization:
/CoreOS/selinux-policy/Regression/bz530552-virDomainSave-and-dd-execution

Actual results:
----
time->Fri Nov 12 07:32:36 2010
type=SYSCALL msg=audit(1289565156.823:74): arch=c000003e syscall=87 success=no exit=-13 a0=9ae3dd0 a1=c2 a2=7 a3=0 items=0 ppid=1 pid=31143 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2 comm="qemu-kvm" exe="/usr/libexec/qemu-kvm" subj=system_u:system_r:svirt_t:s0:c668,c792 key=(null)
type=AVC msg=audit(1289565156.823:74): avc:  denied  { unlink } for  pid=31143 comm="qemu-kvm" name="kvm.MhzoQ3" dev=hugetlbfs ino=118439 scontext=system_u:system_r:svirt_t:s0:c668,c792 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=file
----
time->Fri Nov 12 07:32:36 2010
type=SYSCALL msg=audit(1289565156.823:75): arch=c000003e syscall=77 success=no exit=-13 a0=8 a1=21600000 a2=ffe00000 a3=0 items=0 ppid=1 pid=31143 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2 comm="qemu-kvm" exe="/usr/libexec/qemu-kvm" subj=system_u:system_r:svirt_t:s0:c668,c792 key=(null)
type=AVC msg=audit(1289565156.823:75): avc:  denied  { write } for  pid=31143 comm="qemu-kvm" name="kvm.MhzoQ3" dev=hugetlbfs ino=118439 scontext=system_u:system_r:svirt_t:s0:c668,c792 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=file
----
time->Fri Nov 12 07:32:36 2010
type=SYSCALL msg=audit(1289565156.823:76): arch=c000003e syscall=9 success=no exit=-13 a0=0 a1=21600000 a2=3 a3=2 items=0 ppid=1 pid=31143 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2 comm="qemu-kvm" exe="/usr/libexec/qemu-kvm" subj=system_u:system_r:svirt_t:s0:c668,c792 key=(null)
type=AVC msg=audit(1289565156.823:76): avc:  denied  { read } for  pid=31143 comm="qemu-kvm" path="/mnt/huge/libvirt/qemu/kvm.MhzoQ3" dev=hugetlbfs ino=118439 scontext=system_u:system_r:svirt_t:s0:c668,c792 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=file
----

Expected results:
no AVCs
Comment 1 Daniel Walsh 2010-11-12 14:41:08 UTC 
I am not sure hugetlbfs supports labeling in RHEL5, so you might need to allow svirt_t to manage this file system.
Comment 2 Miroslav Grepl 2010-11-18 13:05:12 UTC 
*** Bug 638161 has been marked as a duplicate of this bug. ***
Comment 3 Miroslav Grepl 2010-11-23 16:33:17 UTC 
Fixed in selinux-policy-2.4.6-294.el5.noarch
Comment 6 Jaromir Hradilek 2011-01-05 16:27:14 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Due to an error in the SELinux policy, SELinux prevented the qemu-kvm command from accessing HugeTLBfs devices. This update corrects the SELinux rules to allow this access.
Comment 8 errata-xmlrpc 2011-01-13 21:51:17 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-2011-0026.html