Kerberos Authentication for CUPS web interface is not working when selinux is in enforcing mode.

CUPS package version:
cups-1.4.2-39.el6.x86_64

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/var/log/cups/error_log:

E [23/Aug/2011:09:14:33 -0400] cupsdAuthorize: pam_authenticate() returned 7 (Authentication failure)!

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AVC, confirmed to be solving the issue:

type=AVC msg=audit(1314106699.568:97774): avc:  denied  { unlink } for  pid=2553 comm="cupsd" name="host_0" dev=sda3 ino=3663569 scontext=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:user_tmp_t:s0 tclass=file
type=SYSCALL msg=audit(1314106699.568:97774): arch=c000003e syscall=87 success=no exit=-13 a0=7f1ce094a8b0 a1=ffffffff a2=0 a3=10 items=0 ppid=1 pid=2553 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=2076 comm="cupsd" exe="/usr/sbin/cupsd" subj=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 key=(null)
type=USER_AUTH msg=audit(1314106701.647:97775): user pid=2553 uid=0 auid=0 ses=2076 subj=unconfined_u:system_r:cupsd_t:s0-s0:c0.c1023 msg='op=PAM:authentication acct="jmontleo" exe="/usr/sbin/cupsd" hostname=10.11.131.75 addr=10.11.131.75 terminal=cups res=failed'

module cupsauth 1.0;

require {
	type user_tmp_t;
	type cupsd_t;
	class file unlink;
}

#============= cupsd_t ==============
allow cupsd_t user_tmp_t:file unlink;