libreport version: 2.0.10 executable: /usr/bin/python2.7 hashmarkername: setroubleshoot kernel: 3.3.7-1.fc17.x86_64 time: Wed 30 May 2012 12:46:37 AM WEST description: :SELinux is preventing /usr/bin/qemu-kvm from 'write' accesses on the blk_file sda1. : :***** Plugin catchall (100. confidence) suggests *************************** : :If you believe that qemu-kvm should be allowed write access on the sda1 blk_file 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-kvm /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context system_u:system_r:svirt_t:s0:c154,c176 :Target Context system_u:object_r:virt_content_t:s0 :Target Objects sda1 [ blk_file ] :Source qemu-kvm :Source Path /usr/bin/qemu-kvm :Port <Unknown> :Host (removed) :Source RPM Packages qemu-system-x86-1.0-17.fc17.x86_64 :Target RPM Packages :Policy RPM selinux-policy-3.10.0-125.fc17.noarch :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux (removed) 3.3.7-1.fc17.x86_64 #1 SMP Mon : May 21 22:32:19 UTC 2012 x86_64 x86_64 :Alert Count 1 :First Seen Wed 30 May 2012 12:45:28 AM WEST :Last Seen Wed 30 May 2012 12:45:28 AM WEST :Local ID 6675601d-ab49-482c-bc88-4017e2fad10b : :Raw Audit Messages :type=AVC msg=audit(1338335128.295:229): avc: denied { write } for pid=2595 comm="qemu-kvm" name="sda1" dev="devtmpfs" ino=51644 scontext=system_u:system_r:svirt_t:s0:c154,c176 tcontext=system_u:object_r:virt_content_t:s0 tclass=blk_file : : :type=SYSCALL msg=audit(1338335128.295:229): arch=x86_64 syscall=open success=no exit=EACCES a0=7f78f5a33900 a1=81002 a2=0 a3=48 items=0 ppid=1 pid=2595 auid=4294967295 uid=107 gid=107 euid=107 suid=107 fsuid=107 egid=107 sgid=107 fsgid=107 tty=(none) ses=4294967295 comm=qemu-kvm exe=/usr/bin/qemu-kvm subj=system_u:system_r:svirt_t:s0:c154,c176 key=(null) : :Hash: qemu-kvm,svirt_t,virt_content_t,blk_file,write : :audit2allowunable to open /sys/fs/selinux/policy: Permission denied : : :audit2allow -Runable to open /sys/fs/selinux/policy: Permission denied : :
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: se
Miroslav, I assume that technical note piece was an accident. Can you explain what the issue is here? It claims the file is labeled virt_content_t so I don't understand the issue.
Content under /dev should never be labeled virt_content_t, it is not virt_content_t, it is either a fixed_disk_device_t or a removable_device_t. In this AVC it looks like libvirt relabeled the device sda1 to virt_content_t in stead of fixed_disk_device_t. The avc is fine, since we do not want svirt_t able to write to virt_content_t.
(In reply to comment #3) > Content under /dev should never be labeled virt_content_t, it is not > virt_content_t, it is either a fixed_disk_device_t or a removable_device_t. > In this AVC it looks like libvirt relabeled the device sda1 to > virt_content_t in stead of fixed_disk_device_t. The avc is fine, since we > do not want svirt_t able to write to virt_content_t. There's another bug tracking similar issues with /dev/sr0, duping to that. *** This bug has been marked as a duplicate of bug 755535 ***