On Thu, 18 Oct 2012 11:35:53 +0100 Ian Campbell <ian.campb...@citrix.com> wrote:
> > > @@ -439,6 +490,19 @@ static long privcmd_ioctl(struct file *file, > > return ret; > > } > > > > +static void privcmd_close(struct vm_area_struct *vma) > > +{ > > + struct page **pages = vma ? vma->vm_private_data : NULL; > > Can VMA really be NULL?... Good programming I thought! > > + int numpgs = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; > > ...I assume not since you unconditionally dereference it here. Added this later, and just didn't change the earlier part. > > + if (!pages || !numpgs > > || !xen_feature(XENFEAT_auto_translated_physmap)) > > In the non-xlat case pages will (or should!) be 1 here which will pass > the first clause of the test. > > Although the later clauses will catch this I think it would be worth > ordering the checks such that they are each valid, perhaps by pulling > the feature check to the front or by separating the !xlat case from > the other two which are valid iff xlat == True. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/