[PATCH v3 2.6.39-rc1-tip 15/26] 15: uprobes: Handing int3 and singlestep exception.

[Steven Rostedt]

On Tue, 2011-04-19 at 15:03 +0200, Peter Zijlstra wrote:
> On Fri, 2011-04-01 at 20:05 +0530, Srikar Dronamraju wrote:
> > +       if (unlikely(!utask)) {
> > +               utask = add_utask();
> > +
> > +               /* Failed to allocate utask for the current task. */
> > +               BUG_ON(!utask);
> 
> That's not really nice is it ;-) means I can make the kernel go BUG by
> simply applying memory pressure.

Agreed,

None of these patches should have a single BUG_ON(). They all must fail
nicely.

-- Steve

> 
> > +               utask->state = UTASK_BP_HIT;
> > +       }