Selinux so badly corrupted machine can't start

[Daniel J Walsh]

Claude Jones wrote:
> In a different thread "Re: Package managers gone haywire! yum, apt, rpm: pam 
> is totally borked" I've described a series of failures that occurred with my 
> package management system beginning on Saturday. There were 36 hours+ of 
> attempts to repair this which involved multiple attempted updates that failed 
> with frozen GUI's in Smart, Yumex, and Synaptic and command line errors 
> including multiple segfaults when updates were attempted. Gradually, all the 
> updates were eventually done. 
>
> Two of the packages that were involved were selinux-policy and 
> selinux-policy-targeted. While most issues seem to be getting resolved, 
> running with selinux enabled is impossible. If I enable it, I get a flood of 
> error messages on boot up and eventually, Fedora drops me to a shell and 
> suggests a file system check or Ctl-D to continue; Ctl-D just reboots the 
> machine with the same results; fsck always returns a clean file system with 
> no reported problems. I've removed and reinstalled selinux-policy and 
> selinux-policy-targeted but that didn't change matters. touch /.autorelabel 
> is impossible, because it never gets to that point. I looked at removing 
> other parts of selinux but they involve dependencies on every other package 
> installed, it seems like. Is there any other tool I can use to repair the 
> selinux installation? As I'm looking closer at last night's log after 
> attempting to start with selinux running, I see that all the failures have to 
> do with /dev entries, hardware -- I noticed during the bootup that the 
> messages flying by seemed to largely associated with udev problems; here's an 
> example of three of the failure messages:
>
> type=AVC msg=audit(1181875931.670:6570): avc:  denied  { getattr } for  
> pid=9482 comm="rpc.mountd" name="audio" dev=tmpfs ino=6018 
> scontext=system_u:system_r:nfsd_t:s0 
> tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file
> type=SYSCALL msg=audit(1181875931.670:6570): arch=40000003 syscall=195 
> success=no exit=-13 a0=bf852054 a1=bf851f30 a2=873ff4 a3=3 items=0 ppid=1 
> pid=9482 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 
> tty=(none) comm="rpc.mountd" exe="/usr/sbin/rpc.mountd" 
> subj=system_u:system_r:nfsd_t:s0 key=(null)
> type=AVC_PATH msg=audit(1181875931.670:6570):  path="/dev/audio"
>
> type=AVC msg=audit(1181875931.670:6571): avc:  denied  { getattr } for  
> pid=9482 comm="rpc.mountd" name="mixer" dev=tmpfs ino=6006 
> scontext=system_u:system_r:nfsd_t:s0 
> tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file
> type=SYSCALL msg=audit(1181875931.670:6571): arch=40000003 syscall=195 
> success=no exit=-13 a0=bf852054 a1=bf851f30 a2=873ff4 a3=3 items=0 ppid=1 
> pid=9482 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 
> tty=(none) comm="rpc.mountd" exe="/usr/sbin/rpc.mountd" 
> subj=system_u:system_r:nfsd_t:s0 key=(null)
> type=AVC_PATH msg=audit(1181875931.670:6571):  path="/dev/mixer"
> type=AVC msg=audit(1181875931.670:6572): avc:  denied  { getattr } for  
> pid=9482 comm="rpc.mountd" name="dsp" dev=tmpfs ino=5980 
> scontext=system_u:system_r:nfsd_t:s0 
> tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file
> type=SYSCALL msg=audit(1181875931.670:6572): arch=40000003 syscall=195 
> success=no exit=-13 a0=bf852054 a1=bf851f30 a2=873ff4 a3=3 items=0 ppid=1 
> pid=9482 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 
> tty=(none) comm="rpc.mountd" exe="/usr/sbin/rpc.mountd" 
> subj=system_u:system_r:nfsd_t:s0 key=(null)
> type=AVC_PATH msg=audit(1181875931.670:6572):  path="/dev/dsp"
>
> type=AVC msg=audit(1181875931.670:6573): avc:  denied  { getattr } for  
> pid=9482 comm="rpc.mountd" name="adsp" dev=tmpfs ino=5946 
> scontext=system_u:system_r:nfsd_t:s0 
> tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file
> type=SYSCALL msg=audit(1181875931.670:6573): arch=40000003 syscall=195 
> success=no exit=-13 a0=bf852054 a1=bf851f30 a2=873ff4 a3=3 items=0 ppid=1 
> pid=9482 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 
> tty=(none) comm="rpc.mountd" exe="/usr/sbin/rpc.mountd" 
> subj=system_u:system_r:nfsd_t:s0 key=(null)
> type=AVC_PATH msg=audit(1181875931.670:6573):  path="/dev/adsp"
>
> Does this make sense to anyone? Is this a udev problem, a selinux problem, or 
> something else entirely? With selinux disabled, things seem to back to normal 
> this morning
>
> I don't think I ever mentioned this in all these trouble reports - this is F7 
> running on a 2.8 GHz P4 with 1 GB of ram - Windows XP is also installed on 
> this box, and it runs perfectly. My F7 installation is about two weeks old. 
>   

Are you sharing /dev via nfs?