Description of problem:

In /etc/fstab:

tmpfs                   /var/spool/exim/input   tmpfs  
uid=exim,gid=exim,context=system_u:object_r:var_spool_t,size=20M,mode=0750 0 0
tmpfs                   /var/spool/spamikaze    tmpfs  
uid=exim,gid=exim,context=system_u:object_r:var_spool_t,size=20M,mode=0750 0 0

Trying to mount these filesystems fails with:

# mount /var/spool/spamikaze/
SELinux: security_context_to_sid(system_u:object_r:var_spool_t) failed for (dev
tmpfs, type tmpfs) errno=-22

Version-Release number of selected component (if applicable):

2.6.18-53.1.6.el5xen

Expected results:

The security context is valid, since other directories are labeled that way.  I
have no idea why security_context_to_sid would fail for an already known context.

It would be nice if the tmpfs mount worked...