From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [RFC v2 2/8] iommu/iova: fix __alloc_and_insert_iova_range Date: Thu, 10 Nov 2016 16:22:41 +0100 Message-ID: <20161110152241.GF2078@8bytes.org> References: <1478258646-3117-1-git-send-email-eric.auger@redhat.com> <1478258646-3117-3-git-send-email-eric.auger@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, marc.zyngier-5wv7dgnIgG8@public.gmane.org, punit.agrawal-5wv7dgnIgG8@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org To: Eric Auger Return-path: Content-Disposition: inline In-Reply-To: <1478258646-3117-3-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: kvm.vger.kernel.org On Fri, Nov 04, 2016 at 11:24:00AM +0000, Eric Auger wrote: > Fix the size check within start_pfn and limit_pfn. > > Signed-off-by: Eric Auger > > --- > > the issue was observed when playing with 1 page iova domain with > higher iova reserved. > --- > drivers/iommu/iova.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c > index e23001b..ee29dbf 100644 > --- a/drivers/iommu/iova.c > +++ b/drivers/iommu/iova.c > @@ -147,7 +147,7 @@ static int __alloc_and_insert_iova_range(struct iova_domain *iovad, > if (!curr) { > if (size_aligned) > pad_size = iova_get_pad_size(size, limit_pfn); > - if ((iovad->start_pfn + size + pad_size) > limit_pfn) { > + if ((iovad->start_pfn + size + pad_size - 1) > limit_pfn) { A >= check is more readable here. Joerg