From owner-svn-src-all@freebsd.org  Tue Mar 27 13:09:35 2018
Return-Path: <owner-svn-src-all@freebsd.org>
Delivered-To: svn-src-all@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id CF401F50ED2;
 Tue, 27 Mar 2018 13:09:35 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org
 [IPv6:2610:1c1:1:606c::19:3])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "mxrelay.nyi.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 81639838A4;
 Tue, 27 Mar 2018 13:09:35 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7C5BD1C754;
 Tue, 27 Mar 2018 13:09:35 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w2RD9ZEo022909;
 Tue, 27 Mar 2018 13:09:35 GMT (envelope-from kib@FreeBSD.org)
Received: (from kib@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id w2RD9ZGC022908;
 Tue, 27 Mar 2018 13:09:35 GMT (envelope-from kib@FreeBSD.org)
Message-Id: <201803271309.w2RD9ZGC022908@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org
 using -f
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Tue, 27 Mar 2018 13:09:35 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject: svn commit: r331614 - stable/11/sys/vm
X-SVN-Group: stable-11
X-SVN-Commit-Author: kib
X-SVN-Commit-Paths: stable/11/sys/vm
X-SVN-Commit-Revision: 331614
X-SVN-Commit-Repository: base
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.25
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 27 Mar 2018 13:09:36 -0000

Author: kib
Date: Tue Mar 27 13:09:35 2018
New Revision: 331614
URL: https://svnweb.freebsd.org/changeset/base/331614

Log:
  MFC r331247:
  Check for wrap-around in vm_phys_alloc_seg_contig().

Modified:
  stable/11/sys/vm/vm_phys.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/vm/vm_phys.c
==============================================================================
--- stable/11/sys/vm/vm_phys.c	Tue Mar 27 11:49:15 2018	(r331613)
+++ stable/11/sys/vm/vm_phys.c	Tue Mar 27 13:09:35 2018	(r331614)
@@ -1396,6 +1396,8 @@ vm_phys_alloc_seg_contig(struct vm_phys_seg *seg, u_lo
 					 */
 					pa = VM_PAGE_TO_PHYS(m_ret);
 					pa_end = pa + size;
+					if (pa_end < pa)
+						continue;
 					for (;;) {
 						pa += 1 << (PAGE_SHIFT +
 						    VM_NFREEORDER - 1);