Re: [PATCH] SELinux: bigendian problems with filename trans rules

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On Thursday, February 20, 2014 01:14:45 PM Stephen Smalley wrote:
> On 02/20/2014 10:56 AM, Eric Paris wrote:
> > When writing policy via /sys/fs/selinux/policy I wrote the type and class
> > of filename trans rules in CPU endian instead of little endian.  On
> > x86_64 this works just fine, but it means that on big endian arch's like
> > ppc64 and s390 userspace reads the policy and converts it from
> > le32_to_cpu.  So the values are all screwed up.  Write the values in le
> > format like it should have been to start.
> > 
> > Signed-off-by: Eric Paris <eparis@xxxxxxxxxx>
> > ---
> > 
> >  security/selinux/ss/policydb.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/security/selinux/ss/policydb.c
> > b/security/selinux/ss/policydb.c index c0f4988..9c5cdc2 100644
> > --- a/security/selinux/ss/policydb.c
> > +++ b/security/selinux/ss/policydb.c
> > @@ -3338,10 +3338,10 @@ static int filename_write_helper(void *key, void
> > *data, void *ptr)> 
> >  	if (rc)
> >  	
> >  		return rc;
> > 
> > -	buf[0] = ft->stype;
> > -	buf[1] = ft->ttype;
> > -	buf[2] = ft->tclass;
> > -	buf[3] = otype->otype;
> > +	buf[0] = cpu_to_le32(ft->stype);
> > +	buf[1] = cpu_to_le32(ft->ttype);
> > +	buf[2] = cpu_to_le32(ft->tclass);
> > +	buf[3] = cpu_to_le32(otype->otype);
> > 
> >  	rc = put_entry(buf, sizeof(u32), 4, fp);
> >  	if (rc)
> 
> Acked-by:  Stephen Smalley <sds@xxxxxxxxxxxxx>

Applied, thanks.

-- 
paul moore
security and virtualization @ redhat

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