On Thu, 5 Mar 2015, Naoya Horiguchi wrote: > walk_page_test() is purely pagewalk's internal stuff, and its positive return > values are not intended to be passed to the callers of pagewalk. However, in > the current code if the last vma in the do-while loop in walk_page_range() > happens to return a positive value, it leaks outside walk_page_range(). > So the user visible effect is invalid/unexpected return value (according to > the reporter, mbind() causes it.) > > This patch fixes it simply by reinitializing the return value after checked. > > Another exposed interface, walk_page_vma(), already returns 0 for such cases > so no problem. > > Fixes: 6f4576e3687b ("mempolicy: apply page table walker on > queue_pages_range()") > Reported-by: Kazutomo Yoshii <kazutomo.yos...@gmail.com> > Signed-off-by: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
Acked-by: David Rientjes <rient...@google.com> This is exactly what I had in mind, thanks for fixing it up so fast! -- 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/