From owner-svn-src-all@freebsd.org Tue Oct 25 17:16:10 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0C494C21362; Tue, 25 Oct 2016 17:16:10 +0000 (UTC) (envelope-from glebius@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 mx1.freebsd.org (Postfix) with ESMTPS id D00921A9A; Tue, 25 Oct 2016 17:16:09 +0000 (UTC) (envelope-from glebius@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u9PHG89j076521; Tue, 25 Oct 2016 17:16:08 GMT (envelope-from glebius@FreeBSD.org) Received: (from glebius@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u9PHG85X076520; Tue, 25 Oct 2016 17:16:08 GMT (envelope-from glebius@FreeBSD.org) Message-Id: <201610251716.u9PHG85X076520@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: glebius set sender to glebius@FreeBSD.org using -f From: Gleb Smirnoff Date: Tue, 25 Oct 2016 17:16:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r307940 - stable/10/sys/amd64/amd64 X-SVN-Group: stable-10 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: 2.1.23 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Oct 2016 17:16:10 -0000 Author: glebius Date: Tue Oct 25 17:16:08 2016 New Revision: 307940 URL: https://svnweb.freebsd.org/changeset/base/307940 Log: Merge r307936: The argument validation in r296956 was not enough to close all possible overflows in sysarch(2). Submitted by: Kun Yang Patch by: kib Security: SA-16:15 Modified: stable/10/sys/amd64/amd64/sys_machdep.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/amd64/amd64/sys_machdep.c ============================================================================== --- stable/10/sys/amd64/amd64/sys_machdep.c Tue Oct 25 17:15:32 2016 (r307939) +++ stable/10/sys/amd64/amd64/sys_machdep.c Tue Oct 25 17:16:08 2016 (r307940) @@ -619,6 +619,8 @@ amd64_set_ldt(td, uap, descs) largest_ld = uap->start + uap->num; if (largest_ld > max_ldt_segment) largest_ld = max_ldt_segment; + if (largest_ld < uap->start) + return (EINVAL); i = largest_ld - uap->start; mtx_lock(&dt_lock); bzero(&((struct user_segment_descriptor *)(pldt->ldt_base)) @@ -631,7 +633,8 @@ amd64_set_ldt(td, uap, descs) /* verify range of descriptors to modify */ largest_ld = uap->start + uap->num; if (uap->start >= max_ldt_segment || - largest_ld > max_ldt_segment) + largest_ld > max_ldt_segment || + largest_ld < uap->start) return (EINVAL); }