Bug 1019003 - SELinux is preventing /usr/bin/qemu-system-x86_64 from 'search' accesses on the directory net.
SELinux is preventing /usr/bin/qemu-system-x86_64 from 'search' accesses on t...
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
x86_64 Unspecified
unspecified Severity unspecified
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Assigned To: Miroslav Grepl
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-10-14 18:45 EDT by Eric Blake
Modified: 2013-11-04 21:52 EST (History)
5 users (show)

See Also:
Fixed In Version: selinux-policy-3.12.1-74.11.fc19
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-11-04 21:52:08 EST
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Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Eric Blake 2013-10-14 18:45:58 EDT
Description of problem:
I'm trying to set up libvirt to use gluster for disk image storage.  I validated that I can set up the gluster volume:

# mount -t glusterfs red:/vol1 /mnt/sysroot/
# truncate --size 10M /mnt/sysroot/img
# ls /mnt/sysroot/
# umount /mnt/sysroot 

Then added this to the libvirt domainXML:

    <disk type='network' device='disk'>
      <driver name='qemu' type='raw'/>
      <source protocol='gluster' name='vol1/img'>
        <host name='red'/>
      <target dev='vdb' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>

which results in attempting this qemu command line:

LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=spice /usr/bin/qemu-kvm -name f18-live -S -machine pc-i440fx-1.6,accel=kvm,usb=off -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 6f47e00c-0342-4df9-87a2-824585d1b5d5 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/f18-live.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/home/eblake/Downloads/Fedora-18-x86_64-netinst.iso,if=none,id=drive-virtio-disk0,readonly=on,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=gluster://red/vol1/img,if=none,id=drive-virtio-disk1,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk1,id=virtio-disk1 -netdev tap,fd=25,id=hostnet0,vhost=on,vhostfd=26 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:56:7f:f0,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -spice port=5900,addr=,disable-ticketing,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7

and this error message:

# virsh start f18-live
error: Failed to start domain f18-live
error: internal error: early end of file from monitor: possible problem:
qemu-system-x86_64: -drive file=gluster://red/vol1/img,if=none,id=drive-virtio-disk1,format=raw: Gluster connection failed for server=red port=0 volume=vol1 image=img transport=tcp
qemu-system-x86_64: -drive file=gluster://red/vol1/img,if=none,id=drive-virtio-disk1,format=raw: could not open disk image gluster://red/vol1/img: Transport endpoint is not connected

as well as the AVC.  Obviously, I've still got something wrong with my XML to not be able to connect to gluster properly; but I also don't think an AVC should be happening.

Oddly enough, I get the same AVC plus two others even when re-testing in permissive mode.
SELinux is preventing /usr/bin/qemu-system-x86_64 from 'search' accesses on the directory net.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that qemu-system-x86_64 should be allowed search access on the net directory by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
allow this access for now by executing:
# grep qemu-system-x86 /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:svirt_t:s0:c427,c614
Target Context                system_u:object_r:sysctl_net_t:s0
Target Objects                net [ dir ]
Source                        qemu-system-x86
Source Path                   /usr/bin/qemu-system-x86_64
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           qemu-system-x86-1.6.0-10.fc19.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-74.9.fc19.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.10.7-200.fc19.x86_64 #1 SMP Thu
                              Aug 15 23:19:45 UTC 2013 x86_64 x86_64
Alert Count                   2
First Seen                    2013-10-14 16:29:53 MDT
Last Seen                     2013-10-14 16:29:56 MDT
Local ID                      503b1f62-7bdb-4f21-9101-5b0aa4624560

Raw Audit Messages
type=AVC msg=audit(1381789796.114:1255): avc:  denied  { search } for  pid=25361 comm="qemu-system-x86" name="net" dev="proc" ino=12331 scontext=system_u:system_r:svirt_t:s0:c427,c614 tcontext=system_u:object_r:sysctl_net_t:s0 tclass=dir

type=SYSCALL msg=audit(1381789796.114:1255): arch=x86_64 syscall=open success=no exit=EACCES a0=7f7a2a214748 a1=0 a2=10 a3=0 items=0 ppid=1 pid=25361 auid=4294967295 uid=107 gid=107 euid=107 suid=107 fsuid=107 egid=107 sgid=107 fsgid=107 ses=4294967295 tty=(none) comm=qemu-system-x86 exe=/usr/bin/qemu-system-x86_64 subj=system_u:system_r:svirt_t:s0:c427,c614 key=(null)

Hash: qemu-system-x86,svirt_t,sysctl_net_t,dir,search

Additional info:
reporter:       libreport-2.1.8
hashmarkername: setroubleshoot
kernel:         3.10.7-200.fc19.x86_64
type:           libreport
Comment 1 Eric Blake 2013-10-15 14:38:01 EDT
Description of problem:
successfully set up libvirt to use a gluster <disk>, but got the AVC while starting the domain.

# mount -t glusterfs red:/vol1 /mnt/sysroot
# ls -l /mnt/sysroot/
total 0
-rw-r--r--. 1 qemu qemu 10485760 Oct 14 16:00 img
# umount /mnt/sysroot 

domain XML includes:

    <disk type='network' device='disk'>
      <driver name='qemu' type='raw'/>
      <source protocol='gluster' name='vol1/img'>
        <host name='red'/>
      <target dev='vdb' bus='virtio'/>
      <alias name='virtio-disk1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>

Additional info:
reporter:       libreport-2.1.8
hashmarkername: setroubleshoot
kernel:         3.10.7-200.fc19.x86_64
type:           libreport
Comment 2 Eric Blake 2013-10-15 14:40:27 EDT
Hmm - odd that the same AVC happens even when I changed gluster configuration per http://www.ovirt.org/Features/GlusterFS_Storage_Domain so that the domain actually boots.  Don't know what the AVC is blocking since the domain still booted.
Comment 3 Daniel Walsh 2013-10-16 15:55:11 EDT
c1041a266f26e80a6de479c38dc4ee36711592e1 allows this in git.
Comment 4 Lukas Vrabec 2013-10-16 16:06:49 EDT
back ported.
Comment 5 Fedora Update System 2013-10-23 07:37:34 EDT
selinux-policy-3.12.1-74.11.fc19 has been submitted as an update for Fedora 19.
Comment 6 Fedora Update System 2013-10-23 20:52:27 EDT
Package selinux-policy-3.12.1-74.11.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.12.1-74.11.fc19'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Comment 7 Fedora Update System 2013-11-04 21:52:08 EST
selinux-policy-3.12.1-74.11.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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