Summary
SELinux is preventing qemu (qemu-kvm) "read" to HelpdeskRHEL4-RHEL4.x86_64 (fixed_disk_device_t).
Detailed Description
SELinux denied qemu access to the block device HelpdeskRHEL4-RHEL4.x86_64. If this is a virtualization image, it needs to be labeled with a virtualization file context (virt_image_t). You can relabel HelpdeskRHEL4-RHEL4.x86_64 to be virt_image_t using chcon. You also need to execute semanage fcontext -a -t virt_image_t 'HelpdeskRHEL4-RHEL4.x86_64' to add this new path to the system defaults. If you did not intend to use HelpdeskRHEL4-RHEL4.x86_64 as a qemu image it could indicate either a bug or an intrusion attempt.
Allowing Access
You can alter the file context by executing chcon -t virt_image_t 'HelpdeskRHEL4-RHEL4.x86_64' You must also change the default file context files on the system in order to preserve them even on a full relabel. "semanage fcontext -a -t virt_image_t 'HelpdeskRHEL4-RHEL4.x86_64'"
Fix Command
chcon -t virt_image_t 'HelpdeskRHEL4-RHEL4.x86_64'
Additional Information
Source Context:  system_u:system_r:qemu_t:s0
Target Context:  system_u:object_r:fixed_disk_device_t:s0
Target Objects:  HelpdeskRHEL4-RHEL4.x86_64 [ blk_file ]
Source:  qemu-kvm
Source Path:  /usr/bin/qemu-kvm
Port:  <Unknown>
Host:  dhcppc2
Source RPM Packages:  kvm-74-2.fc10
Target RPM Packages:  
Policy RPM:  selinux-policy-3.5.7-1.fc10
Selinux Enabled:  True
Policy Type:  targeted
MLS Enabled:  True
Enforcing Mode:  Enforcing
Plugin Name:  qemu_blk_image
Host Name:  localhost.localdomain
Platform:  Linux localhost.localdomain 2.6.27-0.305.rc5.git6.fc10.x86_64 #1 SMP Thu Sep 4 21:42:09 EDT 2008 x86_64 x86_64
Alert Count:  1
First Seen:  Tue Jul 22 08:19:48 2008
Last Seen:  Tue Jul 22 08:19:48 2008
Local ID:  f327c428-a924-44f2-9fc2-29bb20fd51dc
Line Numbers:  1

Raw Audit Messages :

host=dhcppc2 type=AVC msg=audit(1216729188.853:241): avc: denied { read } for pid=14066 comm="qemu-kvm" name="HelpdeskRHEL4-RHEL4.x86_64" dev=tmpfs ino=333 scontext=system_u:system_r:qemu_t:s0 tcontext=system_u:object_r:fixed_disk_device_t:s0 tclass=blk_file host=dhcppc2 type=SYSCALL msg=audit(1216729188.853:241): arch=c000003e syscall=2 success=no exit=-13 a0=7fff6f654680 a1=0 a2=1a4 a3=3342f67a70 items=0 ppid=2953 pid=14066 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="qemu-kvm" exe="/usr/bin/qemu-kvm" subj=system_u:system_r:qemu_t:s0 key=(null)