Description of problem: Can't run GNOME oxes VMs. This popped up when I tried. Boxes should work "out of the box" without need to tweak SELinux booleans. SELinux is preventing /usr/bin/qemu-system-x86_64 from using the 'execstack' accesses on a process. ***** Plugin catchall_boolean (89.3 confidence) suggests ****************** If you want to allow virt to use execmem Then you must tell SELinux about this by enabling the 'virt_use_execmem' boolean. You can read 'None' man page for more details. Do setsebool -P virt_use_execmem 1 ***** Plugin catchall (11.6 confidence) suggests ************************** If you believe that qemu-system-x86_64 should be allowed execstack access on processes labeled svirt_t by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do 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 unconfined_u:unconfined_r:svirt_t:s0:c103,c599 Target Context unconfined_u:unconfined_r:svirt_t:s0:c103,c599 Target Objects Unknown [ process ] Source qemu-system-x86 Source Path /usr/bin/qemu-system-x86_64 Port <Unknown> Host (removed) Source RPM Packages qemu-system-x86-2.1.0-0.4.rc2.fc21.x86_64 Target RPM Packages Policy RPM selinux-policy-3.13.1-66.fc21.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 3.16.0-0.rc5.git2.2.fc22.x86_64 #1 SMP Fri Jul 18 23:04:00 UTC 2014 x86_64 x86_64 Alert Count 1 First Seen 2014-07-22 23:36:10 IDT Last Seen 2014-07-22 23:36:10 IDT Local ID 7b854396-da35-44a2-a921-84ddc132ecaa Raw Audit Messages type=AVC msg=audit(1406061370.507:216): avc: denied { execstack } for pid=15890 comm="qemu-system-x86" scontext=unconfined_u:unconfined_r:svirt_t:s0:c103,c599 tcontext=unconfined_u:unconfined_r:svirt_t:s0:c103,c599 tclass=process permissive=0 type=SYSCALL msg=audit(1406061370.507:216): arch=x86_64 syscall=mprotect success=no exit=EACCES a0=7fff5a9a2000 a1=1000 a2=1000007 a3=7fbf9646ca60 items=0 ppid=1 pid=15890 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=1 comm=qemu-system-x86 exe=/usr/bin/qemu-system-x86_64 subj=unconfined_u:unconfined_r:svirt_t:s0:c103,c599 key=(null) Hash: qemu-system-x86,svirt_t,svirt_t,process,execstack Version-Release number of selected component: selinux-policy-3.13.1-66.fc21.noarch Additional info: reporter: libreport-2.2.3 hashmarkername: setroubleshoot kernel: 3.16.0-0.rc5.git2.2.fc22.x86_64 type: libreport Potential duplicate: bug 1116519
The problem is most qemu users don't need this priv and it is fairly dangerous. I would argue that we should change libvirt to use a different type is the proper way to fix this problem.
Can you show the libvirt XML (virsh dumpxml $vmname) and /var/log/libvirt/qemu/$vmname.log ? libvirt should be handling this correctly already
/var/log/libvirt/qemu is empty. Here is an example of a VM. This problem affects ALL my gnome-boxes VMs. <domain type='kvm'> <name>boxes-unknown-2</name> <uuid>eef07880-c764-4b61-919e-6884a1bbe120</uuid> <title>Fedora-Live-Workstation-x86_64-rawhide-20140703 2</title> <metadata> <boxes:gnome-boxes xmlns:boxes="http://live.gnome.org/Boxes/"> <os-state>installed</os-state> <media>/home/elad/Fedora-Live-Workstation-x86_64-rawhide-20140703.iso</media> </boxes:gnome-boxes> </metadata> <memory unit='KiB'>2122428</memory> <currentMemory unit='KiB'>2122428</currentMemory> <vcpu placement='static'>8</vcpu> <os> <type arch='x86_64' machine='pc-i440fx-2.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> </features> <cpu mode='host-passthrough'> <topology sockets='1' cores='4' threads='2'/> </cpu> <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <pm> <suspend-to-mem enabled='no'/> <suspend-to-disk enabled='no'/> </pm> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/home/elad/.local/share/gnome-boxes/images/boxes-unknown-2'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/elad/Fedora-Live-Workstation-x86_64-rawhide-20140703.iso' startupPolicy='optional'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> <controller type='usb' index='0' model='ich9-ehci1'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <controller type='ccid' index='0'/> <interface type='bridge'> <mac address='52:54:00:22:9c:02'/> <source bridge='virbr0'/> <model type='rtl8139'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <smartcard mode='passthrough' type='spicevmc'> <address type='ccid' controller='0' slot='0'/> </smartcard> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <channel type='spicevmc'> <target type='virtio' name='com.redhat.spice.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='spice' autoport='yes'> <image compression='off'/> </graphics> <sound model='ac97'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='qxl' ram='65536' vram='65536' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <redirdev bus='usb' type='spicevmc'> </redirdev> <redirdev bus='usb' type='spicevmc'> </redirdev> <redirdev bus='usb' type='spicevmc'> </redirdev> <redirdev bus='usb' type='spicevmc'> </redirdev> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </memballoon> </devices> </domain>
Sorry, that should have been ~/.cache/libvirt/qemu/log/$vmname.log, please provide that as well
LC_ALL=C PATH=/usr/lib64/ccache:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/elad/.local/bin:/home/elad/bin HOME=/home/elad USER=elad LOGNAME=elad QEMU_AUDIO_DRV=spice /usr/bin/qemu-kvm -name boxes-unknown-2 -S -machine pc-i440fx-2.0,accel=kvm,usb=off -cpu host -m 2073 -realtime mlock=off -smp 8,sockets=1,cores=4,threads=2 -uuid eef07880-c764-4b61-919e-6884a1bbe120 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/home/elad/.config/libvirt/qemu/lib/boxes-unknown-2.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -device usb-ccid,id=ccid0 -drive file=/home/elad/.local/share/gnome-boxes/images/boxes-unknown-2,if=none,id=drive-ide0-0-0,format=qcow2,cache=none -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=/home/elad/Fedora-Live-Workstation-x86_64-rawhide-20140703.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=22,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:22:9c:02,bus=pci.0,addr=0x3 -chardev spicevmc,id=charsmartcard0,name=smartcard -device ccid-card-passthru,chardev=charsmartcard0,id=smartcard0,bus=ccid0.0 -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=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device AC97,id=sound0,bus=pci.0,addr=0x4 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -chardev spicevmc,id=charredir2,name=usbredir -device usb-redir,chardev=charredir2,id=redir2 -chardev spicevmc,id=charredir3,name=usbredir -device usb-redir,chardev=charredir3,id=redir3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on Domain id=7 is tainted: host-cpu /usr/bin/qemu-system-x86_64: error while loading shared libraries: librados.so.2: cannot enable executable stack as shared object requires: Permission denied 2014-08-08 14:50:03.106+0000: shutting down
Can you do: virt-xml --connect qemu:///session --edit --cpu clearxml=yes boxes-unknown-2 Then virsh start boxes-unknown-2 And see if the error persists?
Same error: error: Failed to start domain boxes-unknown-2 error: internal error: process exited while connecting to monitor: /usr/bin/qemu-system-x86_64: error while loading shared libraries: librados.so.2: cannot enable executable stack as shared object requires: Permission denied
thanks for the info. now that I look at the error I see it's some library messing up, and googling reveals there's another bug tracking the actual culprit *** This bug has been marked as a duplicate of bug 1118504 ***