Re: Strange AVC with latest rawhide kernel.

[Stephen Smalley <sds@tycho.nsa.gov>]

On 02/25/2016 01:02 PM, Daniel J Walsh wrote:
> audit2allow -wla
> type=AVC msg=audit(1456422969.279:1434): avc:  denied  { entrypoint }
> for  pid=23847 comm="exe" path="/usr/bin/bash" dev="dm-2" ino=25165968
> scontext=system_u:system_r:svirt_lxc_net_t:s0:c337,c895
> tcontext=system_u:object_r:svirt_sandbox_file_t:s0:c337,c895
> tclass=file permissive=0
> 	Was caused by:
> 		Unknown - would be allowed by active policy
> 		Possible mismatch between this policy and the one under
> which the audit message was generated.
>
> 		Possible mismatch between current in-memory boolean
> settings vs. permanent ones.
>
> When trying to run a docker container on Rawhide, I am seeing this AVC.
> The policy as audit2allow -w shows allows svirt_sandbox_file_t as an
> entrypoint for svirt_lxc_net_t.
>
> # sesearch -A -s svirt_lxc_net_t -t svirt_sandbox_file_t -c file -p
> entrypoint
> Found 1 semantic av rules:
>     allow svirt_sandbox_domain file_type : file entrypoint ;
>
> But when I run try to start the container, docker blocks the access.  I
> don't see any constraints that would block this, and don't think
> NO_NEW_PRIV is enabled any way, and I don't think it would be involved
> here.
>
> Any idea why SELinux is blocking the access?

kernel version?