Re: [PATCH] do_wait: do take security_task_wait() into account

[Stephen Smalley]

On Fri, 2009-05-01 at 08:51 +1000, James Morris wrote:
> On Wed, 29 Apr 2009, Oleg Nesterov wrote:
> 
> > I was never able to understand what should we actually do when
> > security_task_wait() fails, but the current code doesn't look right.
> > 
> > If ->task_wait() returns the error, we update *notask_error correctly.
> > But then we either reap the child (despite the fact this was forbidden)
> > or clear *notask_error (and hide the securiy policy problems).
> > 
> > This patch assumes that "stolen by ptrace" doesn't matter. If selinux
> > denies the child we should ignore it but make sure we report -EACCESS
> > instead of -ECHLD if there are no other eligible children.
> > 
> > Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
> 
> Applied to: 
> git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next

FWIW, I confirmed that this corrected a FAIL in the ltp selinux
testsuite (wait test).

Tested-by:  Stephen Smalley <sds@xxxxxxxxxxxxx>

-- 
Stephen Smalley
National Security Agency

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