Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932187AbZGAAtB (ORCPT ); Tue, 30 Jun 2009 20:49:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761338AbZGAAeP (ORCPT ); Tue, 30 Jun 2009 20:34:15 -0400 Received: from kroah.org ([198.145.64.141]:60063 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761375AbZGAAeN (ORCPT ); Tue, 30 Jun 2009 20:34:13 -0400 X-Mailbox-Line: From gregkh@mini.kroah.org Tue Jun 30 17:24:14 2009 Message-Id: <20090701002414.000432799@mini.kroah.org> User-Agent: quilt/0.48-1 Date: Tue, 30 Jun 2009 17:22:57 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Avi Kivity Subject: [patch 008/108] KVM: Prevent overflow in largepages calculation References: <20090701002249.937782934@mini.kroah.org> Content-Disposition: inline; filename=kvm-prevent-overflow-in-largepages-calculation.patch In-Reply-To: <20090701002838.GA7100@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1045 Lines: 27 2.6.30-stable review patch. If anyone has any objections, please let us know. ------------------ From: Avi Kivity commit 09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9 upstream. If userspace specifies a memory slot that is larger than 8 petabytes, it could overflow the largepages variable. Signed-off-by: Avi Kivity Signed-off-by: Greg Kroah-Hartman --- virt/kvm/kvm_main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -920,8 +920,7 @@ int __kvm_set_memory_region(struct kvm * int r; gfn_t base_gfn; unsigned long npages, ugfn; - int largepages; - unsigned long i; + unsigned long largepages, i; struct kvm_memory_slot *memslot; struct kvm_memory_slot old, new; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/