[Fwd: Re: sparc64 kernel won't boot with selinux enabled]

[Karl MacMillan <kmacmill@redhat.com>]

[Forwarding to the correct list this time]

Tom 'spot' Callaway wrote:
> I'm working on Aurora, which is a rebuild of Fedora Core for SPARC.
> Lately, I've been testing with selinux enabled on the targeted policy,
> but I haven't gotten very far. When I try to boot on a sparc64, I get
> the following (copied by hand, apologies for any typos, I tried to be
> accurate):
> 

[CC'ing selinux list]

> EXT3-fs: mounted filesystem with ordered data mode.
> audit(1168807648.026:2): enforcing=1 old_enforcing=0 auid=4294967295
> security:  3 users, 6 roles, 1584 types, 172 bools, 1 sens, 1024 cats
> security:  59 classes, 49650 rules
> security:  class dccp_socket not defined in policy
> security:  permission dccp_recv in class node not defined in policy
> security:  permission dccp_send in class node not defined in policy
> security:  permission dccp_recv in class netif not defined in policy
> security:  permission dccp_send in class netif not defined in policy

Seems that there is a mismatch between your policy and the kernel.

> SELinux:  Completing initialization
> SELinux:  Setting up existing superblocks.
> SELinux: initialized (dev dm-0, type ext3), uses xattr
> SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> SELinux: initialized (dev usbfs, type usbfs), uses genfs_contexts
> SELinux: initialized (dev selinuxfs, type selinuxfs), uses
> genfs_contexts
> SELinux: initialized (dev mqueue, type mqueue), uses transition SIDs
> SELinux: initialized (dev hugetlbfs, type hugetlbfs), uses
> genfs_contexts
> SELinux: initialized (dev devpts, type devpts), uses transition SIDs
> SELinux: initialized (dev eventpollfs, type eventpollfs), uses task SIDs
> SELinux: initialized (dev inotifyfs, type inotifyfs), uses
> genfs_contexts
> SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> SELinux: initialized (dev futexfs, type futexfs), uses genfs_contexts
> SELinux: initialized (dev pipefs, type pipefs), uses task SIDs
> SELinux: initialized (dev sockfs, type sockfs), uses task SIDs
> SELinux: initialized (dev proc, type proc), uses genfs_contexts
> SELinux: initialized (dev bdev, type bdev), uses genfs_contexts
> SELinux: initialized (dev rootfs, type rootfs), uses genfs_contexts
> SELinux: initialized (dev sysfs, type sysfs), uses genfs_contexts
> audit(1168807652.930:3): policy loaded auid=4294967295
> audit(1168807653.174:4): avc:  denied  { execmem } for  pid=1
> comm="init" scontext=system_u:system_r:kernel_t:s0
> tcontext=system_u:system_r:kernel_t:s0 tclass=process
> 
> ...And there it sits, as init is denied. :)
> 

Init requiring execmem is surprising to say the least - it certainly
doesn't on i386. Are you seeing a lot of execmem denials in the logs? I
don't really know what is going on, but there is likely a kernel or
compiler / toolchain issue causing overly broad execmem requests.

As a work around you can do (after booting into permissive):

setsebool -P allow_execmem=1

The next reboot will allow this globally and you may get farther in
permissive. You can also change this default in the policy packages.

Karl

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