On Tue, May 7, 2013 at 6:58 PM, <j.gli...@gmail.com> wrote: > From: Jerome Glisse <jgli...@redhat.com> > > Do not increase page count if FOLL_GET is not set. None of the > current user can trigger the issue because none of the current > user call __get_user_pages with both the pages array ptr non > NULL and the FOLL_GET flags non set in other word all caller > of __get_user_pages that don't set the FOLL_GET flags also call > with pages == NULL.
Because, __get_user_pages() doesn't allow pages==NULL and FOLL_GET is on. long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, { (snip) VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET)); -- 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/