SELinux is preventing /bin/systemd-tty-ask-password-agent from using the 'dac_override' capabilities.

*****  Plugin dac_override (91.4 confidence) suggests  ***********************

If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system
Then turn on full auditing to get path information about the offending file and generate the error again.
Do

Turn on full auditing
# auditctl -w /etc/shadow -p w
Try to recreate AVC. Then execute
# ausearch -m avc -ts recent
If you see PATH record check ownership/permissions on file, and fix it, 
otherwise report as a bugzilla.

*****  Plugin catchall (9.59 confidence) suggests  ***************************

If you believe that systemd-tty-ask-password-agent should have the dac_override capability 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 systemd-tty-ask /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:systemd_passwd_agent_t:s0
Target Context                system_u:system_r:systemd_passwd_agent_t:s0
Target Objects                Unknown [ capability ]
Source                        systemd-tty-ask
Source Path                   /bin/systemd-tty-ask-password-agent
Port                          <Unbekannt>
Host                          (removed)
Source RPM Packages           systemd-19-1.fc15
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.15-2.fc15
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.38-rc7-00142-g212e349 #267 Sat Mar 5 21:22:31
                              CET 2011 i686 i686
Alert Count                   3
First Seen                    So 06 Mär 2011 12:49:22 CET
Last Seen                     So 06 Mär 2011 13:35:02 CET
Local ID                      266ae09b-6a80-444d-b44d-1d437f1f24a3

Raw Audit Messages
type=AVC msg=audit(1299414902.482:558): avc:  denied  { dac_override } for  pid=870 comm="systemd-tty-ask" capability=1  scontext=system_u:system_r:systemd_passwd_agent_t:s0 tcontext=system_u:system_r:systemd_passwd_agent_t:s0 tclass=capability


type=AVC msg=audit(1299414902.482:558): avc:  denied  { open } for  pid=870 comm="systemd-tty-ask" name="tty4" dev=tmpfs ino=6107 scontext=system_u:system_r:systemd_passwd_agent_t:s0 tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file


type=SYSCALL msg=audit(1299414902.482:558): arch=i386 syscall=open success=yes exit=ENOEXEC a0=8cd9338 a1=80901 a2=80518c4 a3=0 items=0 ppid=1 pid=870 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=systemd-tty-ask exe=/bin/systemd-tty-ask-password-agent subj=system_u:system_r:systemd_passwd_agent_t:s0 key=(null)

Hash: systemd-tty-ask,systemd_passwd_agent_t,systemd_passwd_agent_t,capability,dac_override

audit2allow

#============= systemd_passwd_agent_t ==============
allow systemd_passwd_agent_t self:capability dac_override;
#!!!! This avc can be allowed using the boolean 'allow_daemons_use_tty'

allow systemd_passwd_agent_t user_tty_device_t:chr_file open;

audit2allow -R

#============= systemd_passwd_agent_t ==============
allow systemd_passwd_agent_t self:capability dac_override;
#!!!! This avc can be allowed using the boolean 'allow_daemons_use_tty'

allow systemd_passwd_agent_t user_tty_device_t:chr_file open;