From owner-svn-src-stable@freebsd.org Fri Nov 10 12:28:45 2017 Return-Path: Delivered-To: svn-src-stable@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 1D2B0E6CD32; Fri, 10 Nov 2017 12:28:45 +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 mx1.freebsd.org (Postfix) with ESMTPS id DBCF271565; Fri, 10 Nov 2017 12:28:44 +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 vAACShP4075477; Fri, 10 Nov 2017 12:28:43 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vAACShgh075476; Fri, 10 Nov 2017 12:28:43 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201711101228.vAACShgh075476@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 10 Nov 2017 12:28:43 +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: r325642 - stable/11/sys/kern X-SVN-Group: stable-11 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/11/sys/kern X-SVN-Commit-Revision: 325642 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Nov 2017 12:28:45 -0000 Author: kib Date: Fri Nov 10 12:28:43 2017 New Revision: 325642 URL: https://svnweb.freebsd.org/changeset/base/325642 Log: MFC r325567: Zero whole struct ptrace_lwpinfo to not leak kernel stack data. Security: CVE-2017-1086 Modified: stable/11/sys/kern/sys_process.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/sys_process.c ============================================================================== --- stable/11/sys/kern/sys_process.c Fri Nov 10 12:07:56 2017 (r325641) +++ stable/11/sys/kern/sys_process.c Fri Nov 10 12:28:43 2017 (r325642) @@ -504,6 +504,7 @@ ptrace_lwpinfo_to32(const struct ptrace_lwpinfo *pl, struct ptrace_lwpinfo32 *pl32) { + bzero(pl32, sizeof(*pl32)); pl32->pl_lwpid = pl->pl_lwpid; pl32->pl_event = pl->pl_event; pl32->pl_flags = pl->pl_flags; @@ -1316,6 +1317,7 @@ kern_ptrace(struct thread *td, int req, pid_t pid, voi } else #endif pl = addr; + bzero(pl, sizeof(*pl)); pl->pl_lwpid = td2->td_tid; pl->pl_event = PL_EVENT_NONE; pl->pl_flags = 0; @@ -1336,8 +1338,6 @@ kern_ptrace(struct thread *td, int req, pid_t pid, voi pl->pl_siginfo = td2->td_si; } } - if ((pl->pl_flags & PL_FLAG_SI) == 0) - bzero(&pl->pl_siginfo, sizeof(pl->pl_siginfo)); if (td2->td_dbgflags & TDB_SCE) pl->pl_flags |= PL_FLAG_SCE; else if (td2->td_dbgflags & TDB_SCX)